What do grasshopper look like

What do grasshopper look like

The name Grasshopper describes a number of insects that fall under the scientific “suborder” Caelifera, which is in the order Orthoptera. Within this suborder there are over 11,000 species of grasshopper. That’s a lot of types of grasshoppers!

Like all insects the grasshopper has six legs, a head, thorax, and abdomen. It also has an exoskeleton which is a hard outer surface that protects its softer insides. They have two pairs of wings. The back wings are larger while the front wings are small and fairly hard. Their back legs are large helping them to jump.

They are normally brown in color, but they can vary in color including yellowish brown, reddish brown, and light green. Some are even striped.

These insects live all around the world except where it is too cold like the north and south poles. They have adapted to most every habitat including deserts, forests, and grasslands.

What do they eat?

Grasshoppers eat plants, primarily leaves, grasses, and cereal crops. A lot of grasshoppers can eat a lot of food and can cause serious problems for farmers by eating all of their crops.

How do Grasshoppers make noise?

Male grasshoppers will make a singing sound by rubbing a hind leg against one of their hard forewings. The rough leg causes the wing to vibrate and make a sound, almost like a bow playing a violin.

How are they different from Crickets?

Grasshoppers and Crickets are similar insects, both being of the order Orthoptera, but they are different and actually are in different scientific suborders. The main differences may be hard to see:

  • Grasshoppers have shorter antennae than crickets.
  • Grasshoppers make sounds by rubbing their forelegs against their wings, while crickets rub their wings together.
  • Grasshoppers hear with their abdomen, while crickets listen with their legs.
  • Grasshoppers are diurnal (active during the day). Crickets are nocturnal (active during the night).
  • Grasshoppers only eat plants, while crickets will eat other animals and are omnivorous.

What are locusts?

Locusts are a type of grasshopper. They typically live alone, but are famous for forming giant swarms that can swoop down and destroy massive areas of crops.

Fun Facts about Grasshoppers

  • A lot of people around the world eat grasshoppers. They are a good source of protein.
  • They lay eggs that hatch into nymphs. As the nymphs grow into full size adults they will molt many times.
  • The villains in the movie A Bug’s Life by Pixar are grasshoppers.
  • They have many predators including birds, sp >

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Control Grasshopper Garden Damage

Grasshoppers cause damage to gardens across the U.S. With about 600 different species in the U.S., grasshoppers are common across the country. About 30 of these species are considered to be garden pests and damaging to plants. Thus, the purpose of this article is to answer the often-asked question: How to kill grasshoppers by natural and organic means or with chemicals?

But just a quick note before we talk about grasshopper control—these insects also can benefit the environment because their excrement provides nutrients to fertilize plants. The grasshoppers themselves are also food for birds, lizards, spiders, and other arthropods and insects.

Damage from Grasshoppers

But grasshoppers also cause damage. Because they are herbivores, they feed on grasses and the leaves and stems of plants; so when large numbers of certain grasshopper species infest farms or garden areas, they can cause extensive plant damage and loss. In fact, in peak years, grasshopper infestations have been known to destroy or consume entire crop fields.

Although grasshoppers will feed on many different plants, they often prefer—and cause the most damage to—small grains, corn, alfalfa, soybeans, cotton, rice, clover, grasses, and tobacco. They may also eat lettuce, carrots, beans, sweet corn, and onions. Grasshoppers are less likely to feed on plants such as squash, peas, and tomatoes leaves. The more grasshoppers there are in any one place. However, the more likely they are to feed on a variety of plants besides the ones they most prefer.

Grasshoppers are most likely to cause damage in sub-humid, semi-arid areas in the middle of the U.S.—from Montana and Minnesota to New Mexico and Texas.

Grasshopper Identification

Adult grasshoppers are reddish brown to olive green, depending on species. They may be as long as 1-3/4 inches, with narrow bodies. These grasshoppers have distinctively long, angled back legs, enabling them to be strong jumpers. They have protruding heads dominated by large eyes and chewing mouthparts. Adult grasshoppers have wings and can fly.

Young grasshoppers are smaller than adults and are wingless. When first hatched, these nymphs will be white. As they grow, they will take on the color of the adults of their species, and wings begin to appear as small pads. Grasshoppers will start being seen in early spring, with the greatest numbers generally occurring in mid-summer. Also, grasshoppers populations are likely to be highest when the weather is hot and dry.

Natural and Organic Control of Grasshoppers

Because grasshoppers are very mobile, they are also very difficult to control. The best way to control grasshopper damage is to prevent the growth of populations:

  • Till the ground in mid- to late summer to eliminate areas in which females would lay their eggs—which overwinter in the soil and hatch in the spring.
  • Till the ground in late fall and early spring to destroy eggs that were laid the previous summer.
  • Get rid of weeds even in areas that don’t have plants to reduce the availability of food for newly hatched nymphs.
  • For natural animal control, encourage grasshopper predators such as birds in and around garden areas.
  • Cover grasshopper-preferred plants with cheesecloth to protect them.

Chemical Control of Grasshoppers

When necessary, chemical bait and spray pesticides that are labeled for grasshopper control can also be used, reading and following all label directions. According to Colorado State University Extension, however, baits and sprays need to be applied to developing stages of grasshoppers and concentrated at sites where egg laying occurs, as the ability to control grasshoppers declines as they develop and migrate.

So when these treatments are used to kill grasshoppers, they should be focused on young grasshoppers and breeding sites during spring and early summer, depending on the geographic area.

The university also notes that adding canola oil to an insecticide spray can improve control by making the treated plants more attractive to the grasshoppers.

www.thespruce.com

Critter Catalog

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Find grasshoppers information at

grasshoppers

What do they look like?

Grasshoppers are medium to large insects. Adult length is 1 to 7 cm, depending on the species. Like their relatives the katydids and crickets, they have chewing mouthparts, two pairs of wings, one narrow and tough, the other wide and flexible, and long hind legs for jumping. They are different from these groups in having short antennae that don’t reach very far back on their bodies.

Grasshoppers usually have large eyes, and are colored to blend into their environment, usually a combination of brown, gray or green. In some species the males have bright colors on their wings that they use to attract females. A few species eat toxic plants, and keep the toxins in their bodies for protection. They are brightly colored to warn predators that they taste bad.

Female grasshoppers are larger than the males, and have sharp points at the end of their abdomen that they to help lay eggs underground. Male grasshoppers sometimes have special structures on their wings that they can rub their hind legs on or rub together to make sounds.

  • Other Physical Features
  • ectothermic
  • bilateral symmetry
  • Sexual Dimorphism
  • female larger
  • male more colorful
  • Range length 1.0 to 7.0 cm 0.39 to 2.76 in

Where do they live?

Grasshoppers are found on all continents except Antarctica. There are over 10,000 species of grasshoppers known, about 50 of which are found in Michigan.

What kind of habitat do they need?

Most grasshoppers prefer dry open habitats with lots of grass and other low plants, though some species live in forests or jungles. Many of the grassland species invade farmer’s fields too.

How do they grow?

Grasshoppers all hatch from eggs, and as they grow they go through incomplete metamorphosis. This means that each stage looks a lot like the adult, but adds a few changes each time the young grasshopper sheds its skin. Grasshoppers usually shed 5 or 6 times. After the last time, they are adults and can reproduce. Most species also get wings when they are adults.

How long do they live?

Most grasshoppers can only survive the winter as an egg; the adults all die when it gets cold. In warm climates which don’t have freezing winters, grasshoppers can probably live longer, maybe for several years. Most die long before that though, from disease or predators or drought.

How do they behave?

Grasshoppers are most active during the day, but also feed at night. They don’t have nests or territories, and some species go on long migrations to find new supplies of food. Most species are solitary, and only come together to mate, but the migratory species sometimes gather in huge groups of millions or even billions of individuals.

How do they communicate with each other?

Grasshoppers mainly use sound and sight to communicate, though like animals, scent and touch are important during mating. In some species males vibrate their wings or rub their wings with their legs to make sounds that attract females.

What do they eat?

Grasshoppers are herbivores, they eat plants. They mostly eat leaves, but also flowers, stems and seeds. Sometimes they also scavenge dead insects for extra protein.

What eats them and how do they avo >Grasshoppers jump or fly away, and then hide if they can. Some species eat toxic plants and keep the toxins in their bodies to discourage predators.

What roles do they have in the ecosystem?

Grasshoppers can be important herbivores. There are sometimes so many, eating so much, that they change the richness and abundance of plant species where they live.

Do they cause problems?

Some grasshopper species are important pests of agriculture. They eat the plants that farmers grow in their fields. This is not usually a big problem in North America, but it has been in the past, and is still a major problem in Africa and Asia.

  • Ways that these animals might be a problem for humans
  • crop pest

How do they interact with us?

Grasshoppers are an important food for other animals. Some species eat weed plants that are bad for cattle and horses.

Are they endangered?

No grasshoppers are known to be endangered.

  • IUCN Red List [Link] Not Evaluated

Contributors

George Hammond (author), Animal Diversity Web.

www.biokids.umich.edu

The Prairie Ecologist

Essays, photos, and discussion about prairie ecology, restoration, and management

The Diversity, Beauty, and Secret Lives of Grasshoppers

I know I say this about a lot of different insects, but grasshoppers are truly amazing creatures. Grasshoppers have a reputation as voracious consumers of crops and forage grasses, and that reputation is well-earned. However, the pest tag is far too often and broadly applied. There are something like 400 species of grasshoppers in the western United States, and only about 20 species are categorized pests. In Nebraska, we have 108 grasshopper species, with only a handful that ever cause economic damage, and that damage occurs sporadically – mainly in years when those species have population booms.

The differential grasshopper is one of only a few grasshopper species that can cause economic damage to farmers, ranchers, and gardeners. It’s a native species that has adapted very well to the way we’ve altered its world.

Unfortunately, the “Grasshoppers Destroy Crops” headline tends to swamp the many and much more interesting grasshoppers stories we should be talking about. Let’s start with the numbers I’ve already presented. THERE ARE 400 SPECIES OF GRASSHOPPERS IN THE WESTERN UNITED STATES AND 108 SPECIES IN NEBRASKA ALONE! That doesn’t include katydids or crickets, by the way, just grasshoppers. I’m guessing most of you had no idea there were that many kinds of grasshoppers. Am I right?

I’m including a half dozen grasshopper photos in this post to show off just a taste of the beauty and diversity of grasshoppers in prairies. If you want to read more about this, you can read an article I wrote for the August/September issue of NEBRASKAland Magazine. While you could be forgiven for thinking there are two kinds of grasshoppers in the world – green and brown – you would be very wrong. There are grasshoppers with much more color and pattern variation than many species of birds, but nobody makes movies about people circling the globe to see more grasshopper species than anyone else, do they? Many band-winged grasshoppers show off gorgeous red or yellow wings as they fly, wings that rival those of butterflies, but you don’t hear about historically-prominent British Prime Ministers collecting grasshoppers, do you?

The painted grasshopper (Dactylotum bicolor) rivals any bird for beauty in color and pattern.

Now let’s discuss grasshoppers’ diet, which can include far more than just grasses. Some grasshopper species feed high up in the canopy of prairie vegetation, while others stay on the ground. Many have a very wide diet, including both grasses and wildflowers, but others are much more specialized, including grasshoppers that feed almost completely on one or a few wildflower species. Grasshoppers are often seen feeding on the pollen of flowers, especially sunflowers, providing further evidence that they are much more than just grass eaters. Most grasshopper species prefer the newest, most tender leaves of plants, but some – especially those that live mostly on the ground – make their living off of older leaves, including some dropped by their brethren living above them. Regardless of what they like to eat, grasshoppers have very sensitive organs on the tips of their antennae that help them determine the forage quality of a leaf before they eat it.

The cudweed grasshopper (Hypochlora alba) is named for its favorite food plant – cudweed sagewort, aka white sage (Ambrosia ludoviciana), on which it is supremely well camouflaged.

When you think about animals that have sophisticated communication systems, you probably think about creatures like apes, whales, and even prairie dogs, right? You might be surprised to learn that grasshoppers have their own complex methods of communication as well. Every grasshopper species produces its own unique set of sounds, most of them created by rubbing their hind legs against their abdomen. In addition, some employ what’s called “crepitation” – a loud clacking sound made by snapping their hind wings while flying.

The huge and flightless plains lubber (Brachystola magna) is as gorgeous as it is large.

Grasshoppers can also communicate visually. They can do this by rubbing their legs against their wings, flashing their wings, and making a variety of motions with their legs. Those visual signals can help them attract mates, defend breeding territories and feeding areas, and ward off unwanted suitors. I’m not saying we should make documentaries about people trying to teach grasshoppers how to communicate with American Sign Language, but I’m not NOT saying it either…

This bandwing grasshopper (Oedepodinae) is about as well camouflaged as you could hope for against its sandy background. When it flies, though, it displays very colorful wings (color and pattern varies by species).

If you’re someone who doesn’t care about the beauty, diversity, or communication abilities of grasshoppers, maybe their utilitarian value will make an impression. As a major consumer of vegetation in prairies, grasshoppers play a huge role in nutrient cycling, a role that becomes even more important in prairies without large vertebrate grazers. Perhaps most importantly, though, grasshoppers are a crucial food source for many other animals, including birds and other wildlife species you (hopefully?) enjoy having around. They are large and packed with nutrients, as well as abundant and fairly easy to catch. In addition, while they aren’t a particularly popular food item among people here in North America, grasshoppers are an important source of protein for humans in other parts of the globe.

When grasshoppers start to emerge next spring, please take a little extra time to notice and appreciate them. See how many different colors and shapes of grasshoppers you can find in your neighborhood prairies (remembering that if their antennae are as long as their body or more, they are katydids, not grasshoppers.) Look for the grasshoppers with big colorful wings as they clatter noisily away from your feet. And if you’re a person of financial means, and are interested in making a movie about grasshopper watchers or people trying to teach grasshoppers how to talk to humans, call me. I know people who know people.

How can you not like and admire the green fool grasshopper (Acrolophitus hertipes), with its raised back ridge, bright red antennae and charming face?

prairieecologist.com

What do grasshopper look like

This grasshopper is well known in the southeastern USA, and elsewhere, due to its large size and widespread use in biology classrooms for dissection exercises. Also, it can be of economic importance in Florida. It is one of a few species of grasshoppers in Florida that occurs in large enough numbers to cause serious damage to citrus, vegetable crops, and landscape ornamentals. Unfortunately, the scientific community uses two different scientific names for the same species, and Romalea microptera (Palisot de Beauvois) is also called Romalea guttata (Houttuyn). Technically, the latter is probably the correct name (Kevan 1980), but because the former designation was used for many years, this proposed ‘correction’ has introduced unnecessary confusion (Cohn 1999), so most scientists continue to call it Romalea microptera.

The eastern lubber is quite clumsy and slow in movement and mostly travels by walking and crawling feebly over the substrate. The “lubber” designation is interesting because it aptly describes this grasshopper. “Lubber” is derived from an old English word “lobre” which means lazy or clumsy. This term has come to mean a big, clumsy, and stupid person, also known as a lout or lummox. In modern times, it is normally used only by seafarers, who term novices “landlubbers”. Eastern lubber is one of only four species in the family Romaleidae found north of Mexico, but there are many other species in South America (Rehn and Grant 1961), and many are winged and agile, so although some other species in this family may be called lubbers, the “lubber” designation is not appropriate for the entire family.

Distribution (Back to Top)

The eastern lubber grasshopper is limited to the southeastern region of the United States. It is found from the North Carolina south through South Carolina, Georgia and Florida, and west through Alabama, Mississippi, and Louisiana to central Texas (Capinera et al. 2004).


Figure 1. Distribution of Romalea microptera, the eastern lubber grasshopper.

Description (Back to Top)

Eastern lubber grasshopper is surely the most distinctive grasshopper species found in the southeastern USA. Adults are colorful, but the color pattern varies. Often the adult eastern lubber is mostly yellow or tawny, with black on the distal portion of the antennae, on the pronotum, and on the abdominal segments. The forewings extend two-thirds to three-fourths the length of the abdomen. The hind wings are short and incapable of providing lift for flight. The forewings tend to be pink or rose in color centrally whereas the hind wings are entirely rose in color. Darker forms of this species also exist, wherein the yellow color becomes the minor rather than the major color component, and in northern Florida a predominantly black form is sometimes found. Adults attain a large size, males measuring 43-55 mm in length and females often measuring 50-70 mm, sometimes 90 mm. Not only is this large, heavy-bodied grasshopper unable to fly, but is poor at leaping as well, so mostly it is observed walking. However, it is a good climber, and often climbs trees to feed on juvenile foliage at the tips of branches.

Both sexes stridulate (make noise) by rubbing the forewing against the hind wing. When alarmed, lubbers will spread their wings, hiss, and secrete foul-smelling froth from their spiracles. They can expel a fine spray of toxic chemicals for a distance of 15 cm. The chemical discharge from the tracheal system is believed to be an anti-predator defense, and to consist of chemicals both synthesized and sequestered from the diet. The variation in toxins assimilated from the diet make it difficult for predators to adapt to the toxins (Chapman and Joern 1990). Many vertebrate, but not invertebrate, predators are affected (Jones et al. 1987, 1989; Whitman et al. 1992). Their bright color pattern is believed to be a warning to vertebrate predators that lubbers are not palatable. Their tendency to aggregate and to climb vegetation, especially at night, is a component of their defensive behavior.

Eggs. The eggs of lubber grasshoppers are yellowish or brown in color. They are elongate elliptical in shape and measure about 9.5 mm in length and 2.5 mm in width. They are laid in neatly arranged clusters, or pods, which consist of rows of eggs positioned parallel to one another, and held together by a secretion. Normally there are 30-50 eggs in each pod. Ovipositing females are reported to prefer mixed broadleaf tree-pine habitats with intermediate soil moisture levels, avoiding both lowland, moist, compact soil and upland, dry, sandy soil (Watson 1941, Kuitert and Connin 1953). The female deposits the pod in the soil at a depth of 3-5 cm and closes the oviposition hole with a frothy secretion or plug. The plug allows the young grasshoppers easy access to the soil surface when they hatch. Egg pods tend to be clustered, with females preferentially ovipositing where eggs have already been deposited (Stauffer et al. 1998). According to Hunter-Jones (1967), females each produce 3-5 egg clusters in structures called pods. The pod is not much more than tightly packed eggs surrounded by rigid, frothy material, with most of the froth deposited at the tip of the pod closest to the surface. The froth allows an easy exit for the young hoppers as they can readily wiggle through this as they hatch. The interval between egg pod production by a female is about 2 weeks. Hunter-Jones reported egg production of 30-80 eggs per pod, averaging about 60 eggs per pod. Egg production was greater under solitary than crowded conditions. On the other hand, under field conditions Stauffer and Whitman (2007) reported egg production of 25-50 eggs per pod, with only 1-3 pods per female. Thus, egg production in the laboratory was greater than in the field. The eggs require a cool period (e.g., 20°C for 3 months) but then will hatch when exposed to warmer temperatures. Typically, egg hatch occurs in the morning.

Nymphs. The immature eastern lubber grasshopper differs dramatically in appearance from the adults (Capinera et al. 1999, 2001). Their color pattern is so different from the adult stage that the nymphs commonly are mistaken for a different species than the adult form. Nymphs (immature grasshoppers) typically are almost completely black, but with a distinctive yellow, orange, or red stripe located dorsally (though occasionally they are reddish brown). The hopper’s face, edge of the pronotum, and abdominal segments also may contain reddish accents. Often the reddish accents change to yellow over the course of development. When they first molt, the young hoppers may be brownish, but they soon darken to black.

As they mature, the nymphs change slightly in appearance; the instar can be determined by examination of the developing wings. Normally there are 5 instars, though occasionally 6 instars occur. The early instars can be distinguished by a combination of body size, the number of antennal segments, and the form of the developing wings. The nymphs measure about 10-12, 16-20, 22-25, 30-40, and 35-45 mm in length during instars 1-5, respectively. Antennal segments, which can be difficult to distinguish even with magnification, number 12, 14-16, 16-18, 20, and 20 segments per antenna during instars 1-5, respectively. The shapes of the plates immediately behind the pronotum (the future wings) change slightly with each molt. During the first instar the ventral surface is broadly rounded; during the second instar the ventral edges begin to narrow slightly and point slightly posteriorly, and also acquire slight indication of venation; during the third instar the ventral edges of the plates are markedly elongate, point strongly posteriorly, and the veins are pronounced. At the molt to the fourth instar the orientation of the small, developing wings shifts from pointing downward to pointing upward and posteriorly. In instar 4 the small forewings and hind wings are discrete and do not overlap, though the forewings may be completely or partly hidden beneath the pronotum. In instar 5, the slightly larger wings overlap, appearing to be but a single pair of wings. Even in the fifth instar, however, the wing buds do not cover the tympanum. In adults, however, the wings overlap and cover the tympanum, extending posteriorly to cover 3-4 abdominal segments.

Young nymphs are highly gregarious, and remain gregarious through most of the nymphal period, though the intensity dissipates with time. Especially at night, they tend to aggregate, and may climb vegetation to rest for the evening.

Figure 2. Young lubber, Romalea microptera (Beauvois), instar one. The segments above the second and third legs bear wing buds, though at this stage they are hardly visible. Photograph by Lyle J. Buss, University of Florida.

Figure 3. Young lubber, Romalea microptera (Beauvois), instar two. The beginnings of the wing veins can be seen now. Photograph by Lyle J. Buss, University of Florida.

Figure 4. Young lubber, Romalea microptera (Beauvois), instar three. Now you can better see the developing veins and a slight backward (posterior) extension of the wing buds. Photograph by Lyle J. Buss, University of Florida.

Figure 5. Young lubber, Romalea microptera (Beauvois), instar four. Now you can see something that actually looks like a wing, although it is quite small. Note that it is pointed upward (dorsally). Also note its length relative to the oval, reddish-colored tympanum on the first abdominal segment. Photograph by Lyle J. Buss, University of Florida.

Figure 6. Young lubber, Romalea microptera (Beauvois), instar five. The wing is longer now, extending further posteriorly relative to the tympanum. Next it will molt to the adult, though you cannot tell from the nymph what color form will be assumed by the adult. Photograph by John Capinera, University of Florida.

Figure 7. Lubber nymph Romalea microptera (Beauvois), molting, leaving behind its old (darker) body covering. Photograph by Lyle J. Buss, University of Florida.

Adults. Adult males and females are usually 6.0 and 8.0 cm. long, respectively. The body is quite robust while the legs remain relatively slender. The general color of adults is dull yellow with varying degrees of black spots and markings. The front pair of wings (tegmina) are yellow with numerous scattered black dots, while the hind wings when exposed reveal a bright red/rose coloration with a black border. The color of adult lubbers also varies throughout most of the insect’s range. One phase is nearly entirely black (melanic) with a few marks of yellowish. The adults of this melanic phase seem to resemble the nymph, but only in color. Individuals in the same geographic area may be yellowish, melanic, or somewhere in between. However, despite their different appearances, these different-appearing grasshoppers are the same species and will mate successfully.

Figure 8. Adult eastern lubber grasshopper, Romalea microptera (Beauvois), light color phase. Photograph by John Capinera, University of Florida.

The color of adult lubbers also varies throughout most of the insect’s range. One phase is nearly entirely black with a few marks of yellowish tawny. The adults of this phase seem to resemble the nymph. However, the different phases are indeed the same species.

Figure 9. Adult eastern lubber grasshopper, Romalea microptera (Beauvois), intermediate color phase. Photograph by John Capinera, University of Florida.

Figure 10. Adult eastern lubber grasshopper, Romalea microptera (Beauvois), dark color phase. Photograph by John Capinera, University of Florida.

Figure 11. Black color form of adult eastern lubber grasshopper, Romalea microptera (Beauvois). Photograph by Lyle J. Buss, University of Florida.

Life Cycle (Back to Top)

There is one generation per year, with the egg stage overwintering. Apparently there is not an obligatory diapause (required period of dormancy) in the egg stage; they simply have a long period of development (about 200 days) when held at low temperatures (Hunter-Jones 1967). These grasshoppers are long-lived, and either nymphs or adults are present throughout most of the year in the southern portions of Florida. In northern Florida and along the Gulf Coast they may be found from March-April to about October-November. In Florida, the highest number of adults can be observed during the months of July and August. Eggs are produced about a month after emergence of the adults. Duration of the egg stage is 6-8 months.

After mating, females will begin laying eggs during the summer months. The male usually guards the ovipositing female, sometimes for more than a day. The timing of oviposition is highly variable, but ovipositing females select open, sunny areas of higher elevation, then use the tip of the abdomen to dig a small hole into a suitable patch of soil. Usually at a shallow depth, but sometimes up to a depth of about 5 cm, she will deposit her eggs within a light foamy froth. These eggs will remain in the soil through late fall and winter and then begin hatching in Spring. The young grasshoppers crawl up out of the soil upon hatching and congregate near suitable food sources. Lubbers are often found in damp or wet habitats, but seek drier sites for egg-laying.

Figure 12. Mating adults of two color forms. Photograph by Lyle J. Buss, University of Florida.

Populations cycle up and down, possibly due to the action of parasites. The tachinid fly Anisia serotina (Reinhard) attains high levels of parasitism, sometimes 60-90% (Lamb et al. 1999). We have also found the sarcophagids Blaesoxipha opifera (Coquillett) and Blaesoxipha hunter (Hough) parasitizing this grasshopper, sometimes at high incidences of parasitism (unpublished; identified by G.A. Dahlem, Northern Kentucky University). Pathogens known from Romalea microptera include Boliviana floridensis (Stauffer and Whitman 2007) and Encephalitozoon romaleae (Lange et al. 2009).

Overall, the natural enemies of lubber grasshoppers are poorly documented. Vertebrate predators such as birds and lizards learn to avoid these insects due to the production of toxic secretions by the adult hoppers, though this is not absolute (Chapman and Joern 1990). Naïve vertebrates often gag, regurgitate, and sometimes die following consumption of lubbers (Yousef and Whitman 1992). However, loggerhead shrikes, Lanius ludovicianus Linnaeus, capture and cache lubbers by impaling them on thorns and the barbs of barbed wire fence. After 1-2 days the toxins degrade and the dead lubbers become edible to the shrikes (Yousef and Whitman 1992). In addition to parasitic flies, nematodes have been reported from lubbers, and it is possible to infect lubbers experimentally with the grasshopper-infecting nematode Mermis nigrescens.

Figure 13. One of the species of parasitic flies (Blaesoxipha hunteri) that affects lubbers. The larvae develop within the nymphs, killing their hosts when they emerge. Photograph by Lyle J. Buss, University of Florida.

Habitat and Hosts (Back to Top)

Eastern lubber grasshopper has a broad host range. At least 100 species from 38 plant families containing shrubs, herbs, broadleaf weeds, and grasses are reportedly eaten (Whitman 1988), though their mouthparts are best adapted for feeding on forbs (broad-leaf plants), not grasses (Squitier and Capinera 2002). Among the plants observed to be eaten are pokeweed, Phytolaca americana; tread-softly, Cnidoscolus stimmulosus; pickerel weed, Pontederia cordata; lizard’s tail, Saururus sp.; sedge, Cyperus; and arrowhead, Sagittaria spp. Though its preferred habitat seems to be low, wet areas in pastures and woods and along ditches, lubbers disperse long distances during the nymphal period. They are gregarious and flightless, their migrations sometimes bringing large numbers into contact with crops where they damage vegetables, some field crops (peanuts, cowpeas, corn), fruit trees (citrus, figs, peach), and ornamental plants (Kuitert and Connin 1953).

The nature of polyphagous insects it to accept at least small amounts of many plants, a strategy that assures they will not starve. However, not all plants are accepted equally. For example, although lubbers display broad preference among vegetable crops, some plants such as pea, lettuce, kale, beans, and cabbage are relatively preferred whereas eggplant, tomato, pepper, celery, okra, fennel, and sweet corn are less preferred (Capinera 2014). They commonly defoliate amaryllis, Amazon lily, crinum, narcissus, and related plants (family Amaryllidaceae) in flower gardens. Among ornamental plants, they also will feed readily on oleander, butterfly weed, peregrina, Mexican petunia, and lantana (Capinera 2014). Preferred weeds include painted leaf, Poinsettia cyathophora; tread softly, Cnidoscolus stimulosus; chamber bitter, Phyllanthus urinaria; Florida beggarweed, Desmodium tortuosum; Old-world diamond-flower, Oldenlandia corymbosa; Florida pusley, Richardia scabra; and smooth crabgrass, Digitaria ischaemum (Capinera 2014).

Damage (Back to Top)

Lubber grasshoppers are defoliators, consuming the leaf tissue of numerous plants. They climb readily, and because they are gregarious they can completely strip foliage from plants. More commonly, however, they will eat irregular holes in vegetation and then move on to another leaf or plant. Lubber grasshoppers are not as damaging as their size might suggest; they consume less food than smaller grasshoppers (Griffiths and Thompson 1952). Damage is commonly associated with areas that support weeds or semi-aquatic plants such as irrigation and drainage ditches, end edges of ponds. Grasshoppers developing initially in such areas will disperse to crops and residential areas, where they cause damage. Thus, as is the case with many grasshoppers, monitoring and treatment of areas where nymphal development occurs is recommended to prevent damage to economically important plants. Also helpful is to keep vegetation mowed, as short vegetation is less supportive of grasshoppers.

Management (Back to Top)

Management of these insects tends to rely on capture (physical removal) when only a few hoppers are present. When there are too many to be controlled by hand-picking, insecticides can be applied. Insecticides can be applied to the foliage or directly to the grasshopper. However, due to their large size and ability to detoxify natural toxins associated with food plants, they often prove difficult to kill, especially by spraying the foliage. Insecticides that will kill lubber grasshoppers include carbaryl, bifenthrin, cyhalothrin, permethrin, esfenvalerate, and spinosad (note: these are the technical names of insecticides, not the trade names; these names appear in the ‘ingredients’ section of the label). Spinosad is particularly interesting because it is a biologically based, relatively safe product; unfortunately, it is rather slow acting on grasshoppers, so it may take a few days to see results of treatment. Insecticide treatment is more effective for young grasshoppers, which may necessitate scouting for hoppers in weedy areas, and treatment of them before they move into gardens and crops. An alternative is to treat the margins of cropland, perhaps the initial 1-20 meters, so that as hoppers disperse through the crop from the edges they encounter treated vegetation and perish after sampling it. Because they are dispersive, and may continue to invade an area even after it is treated with insecticide, it can be difficult to provide protection to plants without diligent monitoring and retreatment.

If insecticides are used, be sure to apply them according to the directions on the label of the container. Especially if insecticides are applied to food crops or near water, it is important to follow directions. Most of the insecticides listed above are toxic to fish.

Insecticide-containing baits are sometimes formulated for grasshopper control; normally bran is the substrate to which the insecticide is applied, and it is sprinkled on the soil surface near the plants being protected. Lubbers will accept such baits, and insects are readily killed if they ingest the toxicant and bait. However, this tactic works better when the bait is applied to the vicinity of less preferred plants, as the hoppers will tend to eat the favored host plants in preference to the treated bait (Barbara and Capinera 2003, Capinera 2014). Treatment of field margins with baits can help to reduce crop damage from immature and flightless hoppers such as lubbers, though treatment of field margins is less effective with grasshopper species that are strong fliers such as Schistocerca americana (Drury).

Figure 14. Young nymphs of the eastern lubber grasshopper, Romalea microptera (Beauvois), clustered on a citrus reset (young citrus tree). Photograph by John Capinera, University of Florida.

Selected References (Back to Top)

  • Barbara, KA, Capinera JL. 2003. Development of a toxic bait for control of eastern lubber grasshopper (Orthoptera: Acrididae). Journal of Economic Entomology 96: 584-591.
  • Blatchley WS. 1920. Orthoptera of Northeastern America. Nature Publishing Company. Indianapolis, Indiana. p. 304-307.
  • Capinera JL. 2014. Host plant selection by Romalea microptera (Orthoptera: Romaleidae). Florida Entomologist 97: 38-49.
  • Capinera JL, Scherer CW, Squitier JM. 1999. Grasshoppers of Florida. http://entomology.ifas.ufl.edu/ghopper/ghopper.html
  • Capinera JL, Scherer CW, Squitier JM. 2001. Grasshoppers of Florida. University Press of Florida. 143 pp.
  • Capinera JL, Scott RD, and Walker TJ. 2004. Field guide to the grasshoppers, katydids, and crickets of the United States. Cornell University Press, Ithaca. 249 pp.
  • Chapman RF, Joern A. (eds.) 1990. Biology of Grasshoppers. John Wiley , New York.
  • Cohn TJ. 1999. Current controversies: nomenclatorial stability and the law of priority. Metaleptea 19: 8-9.
  • Griffiths JT, Thompson WL. 1952. Grasshoppers in citrus groves. University of Florida Agricultural Experiment Station Bulletin no. 496.
  • Helfer JR. 1953. How to Know the Grasshoppers, Cockroaches and Their Allies. WM.C. Brown Company Publishers. Dubuque, Iowa. p. 100-101.
  • Hunter-Jones, P. 1967. The life-history of the eastern lubber grasshopper, Romalea microptera (Beauvois), (Orthoptera: Acrididae) under laboratory conditions. Proceedings of the Royal Entomological Society, London (A) 42: 18-24.
  • Johny J, Whitman DW. 2005. Description and laboratory biology ofВ Boliviana floridensisn. sp (Apicomplexa: Eugregarinida) parasitizing the eastern lobster grasshopper,В Romalea micropteraВ (Ortoptera: Romalidae) from Florida, USA. Comparative Parasitology 72: 150-156, doi:В 10.1654/4164.
  • Jones CG, Hess TA, Whitman DW, Silk PJ, Blum MS. 1987. Effects of diet breadth on autogenous chemical defense of a generalist grasshopper. Journal of Chemical Ecology 13: 283-297.
  • Jones CG, Whitman DW, Compton SJ, Silk PJ, Blum MS. 1989. Reduction in diet breadth results in sequestration of plant chemicals and increases efficacy of chemical defense in a generalist grasshopper. Journal of Chemical Ecology 15: 1811-1822.
  • Kevan DK McE. 1080. Romalea guttata (Houttuyn), name change for well-known “eastern lubber grasshopper” (Orthoptera: Romaleidae). Entomological News 91: 139-140.
  • Kuitert LC, Connin RV. 1953. Grasshoppers and their control. University of Florida Agricultural Experiment Station Bulletin no. 516.
  • Lamb MA, Otto DJ, Whitman DW. 1999. Parasitism of eastern lubber grasshopper by Anisia serotina (Diptera: Tachinidae) in Florida. Florida Entomologist 82: 365-371.
  • Lange CE, Johny S, Baker MD, Whitman DW, Solter LF. 2009. A new Encephalitozoon species (Microsporida) isolated from the lubber grasshopper, Romalea microptera (Beauvois) (Orthoptera: Romaleidae). Journal of Parasitology 95: 976-986.
  • Rehn JAG, Grant Jr HJ. 1961. A Monograph of the Orthoptera of North America (North of Mexico). Monographs of the Academy of Natural Sciences of Philadelphia. No. 12. Vol. 1. p.231-240. Wickersham Printing Company. Lancaster, Pennsylvania.
  • Squitier JM, Capinera JL. 2002. Host selection by grasshoppers (Orthoptera: Acrididae) inhabiting semi-aquatic environments. Florida Entomologist 85: 336-340.
  • Stauffer TW, Hegrenes SG, Whitman, DW. 1998. A laboratory study of oviposition site preference in the lubber grasshopper, Romalea guttata (Houttuyn). Journal of Orthoptera Research 7: 217-221.
  • Stauffer TW, Whitman DW. 2007. Divergent oviposition behaviors in a desert vs a marsh grasshopper. Journal of Orthoptera Research 16: 103-114.
  • Watson JR. 1941. Migrations and food preferences of the lubberly locust. Florida Entomologist 24: 40-42.
  • Whitman DW. 1988. Allelochemical interactions among plants, herbivores, and their predators, pp. 11-64 In Barbosa P and Letournearu D (eds.) Novel Aspects of Insect-Plant Interactions. J. Wiley, New York.
  • Whitman DW, Billen JPJ, Alsop D, Blum MS. 1991. Anatomy, ultrastruicture, and functional morphology of the metathoracic tracheal defensive glands of the grasshopper Romalea guttata. Canadian Journal of Zoology 69: 2100-2108.
  • Whitman DW, Jones CG, Blum MS. 1992. Defensive secretion in lubber grasshoppers (Orthoptera: Romalidae): influence of age, sex, diet, and discharge frequency. Annals of the Entomological Society of America 85: 96-102.
  • Yousef R, Whitman D. 1992. Predator exaptations and defensive adaptations in evolutionary balance: no defence is perfect. Evolutionary Ecology 6: 527-536.

Authors: John Capinera and Clay Scherer, University of Florida
Photographs: John Capinera and Lyle J. Buss, University of Florida
Web Design: Don Wasik, Jane Medley
Publication Number: EENY-6
Publication Date: October 1996. Latest revision: November 2016.

An Equal Opportunity Institution
Featured Creatures Editor and Coordinator: Jennifer L. Gillett-Kaufman, University of Florida

entnemdept.ufl.edu

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