Socio-Economic Benefits, Impact Areas, Benefits — Safety of Biotechnology Database

Socio-Economic Benefits

For the purpose of the database, socio-economic benefits refer to benefits offered to a community as a whole through the use of GM crops, and can include long-term impacts on the prevailing economic conditions, on levels of education, on the family unit or on employment levels.

Currently available GM crops provide real economic benefits in the form of lower production costs, improved yields and simplified crop management. They offer growers peace of mind and can free their time and that of their families so they can choose to spend it on activities other than crop production.

The database contains 272 papers and supporting references that have been identified as having information on Socio-Economic Benefits Benefits of Biotechnology.

Use this link to find papers in the database relating to Socio-Economic Benefits

The experience of the first 20 years of commercialization has confirmed that the early promise of crop biotechnology has been fulfilled. Biotech crops have delivered substantial agronomic, environmental, economic, health and social benefits to farmers and, increasingly, to society at large. The rapid adoption of biotech crops, during the initial 20 years of commercialization, reflects the substantial multiple benefits realized by both large and small farmers in industrial and developing countries, which have grown biotech crops commercially. Small farmers in developing countries generally tend to benefit most from biotech crops because insect and disease protected crops provide new and previously unavailable tools for these farmers to protect their crops. Additionally, pest problems are often a greater risk to plants in developing countries and can result in greater yield reductions if left uncontrolled.

The four major biotech crops — soybeans, maize, cotton, and canola — in decreasing area, were the most adopted biotech crops by the 26 countries as reported in the 2018 ISAAA Brief 54. Based on the 2017 FAO global crop area for individual crops, 78% of soybeans, 76% of cotton, 30% of maize, and 29% of canola were biotech crops in 2018.

Biotech crops however have expanded beyond the big four (maize, soybeans, cotton, and canola) to give more choices for many of the world’s consumers and food producers. These biotech crops include alfalfa, sugar beets, papaya, squash, eggplant, potatoes, and apples, all of which are already in the market.

Various trait combinations have also been also approved including high oleic acid canola, isoxaflutole herbicide tolerant (HT) cotton, stacked herbicide tolerant and high oleic acid soybean, HT and salt tolerant soybean, IR sugarcane, and biotech maize with various IR/HT combinations in stack.

The stacked traits with insect resistance and herbicide tolerance increased by 4% and covered 42% of the global area, a testimony to farmers’ adherence to smart agriculture with no till and reduced insecticide use. Herbicide tolerance in soybeans, canola, maize, alfalfa, and cotton has consistently been the dominant trait, which in 2018 covered 46% of the global area – a decrease of 1% compared to 2017.

How to Control Dust at a Construction Site

Dust control measures apply to any construction site where there is the potential for air and water pollution from dust traveling across the landscape or through the air. Dust control includes practices used to reduce or prevent the surface and air transport of dust during construction. The EPA’s recommendations are to clean and impact the least possible areas if they are not going to be worked. However, we all know that sometimes due to scheduled activities, the clearing and grubbing of the entire site is done all at once, although this might be different on large-scale projects.


This is the most used alternative, due to its low cost of implementation and excellent results. Water should be applied at least three times a day or more, depending on the atmospheric conditions. Also, you should be aware of the quantity of water applied and prevent excess water that can cause erosion problems. A water tanker is driven on-site spraying water over the affected areas preventing dust from airborne.

Mulch and Vegetation

Mulch and vegetation may be applied to protect exposed soil from both wind and water erosion. Although this method is «green» friendly, watering your vegetation can become a headache if not coordinated properly as it might bring erosion problems as well. When applied, this technique can reduce wind erosion by up to 80%. Hydro-seeding is one of the dust control methods preferred by construction projects. However, one important thing, depending on where this is located, seeds can be attractive to birds and wildlife, and you could end up losing about 50% of your seeds due to the birds.


Tillage is a control measure performed with chisel type plows on exposed soils. Tillage shall begin on the windward side of the site. Tillage is only applicable to flat areas. Roughening the soil can reduce soil losses by approximately 80% in some situations. Tilling should leave six-inch (minimum) furrows, preferably perpendicular to the prevailing wind direction, to gain the greatest reduction in wind erosion, thus maximizing dust control methods.

Polymers as Dust Control

This can be an effective practice for areas that do not receive vehicle traffic. Dry applied polymers must be initially watered for activation to be effective for dust control. This method bonds the individual soil particles together, and when it dries, it forms a flexible «crust» that strengthens the surface of the soil. It has been determined that the effectiveness of this solution ranges from 70-90%.

Tackifiers and Soil Stabilizers

This dust control method can create a fiber-to-seed-to-soil bond (without hardening) that reduces the need for re-seeding and minimizes soil erosion. During a wetting event, the polymer material absorbs water, which allows the tackifier to go back into solution. Upon drying, there is a new seal over the soil solving the dust control problem on construction sites.


Chloride retains moisture for prolonged periods helping you fighting against dust and erosion problems. The unique property of chlorides helps to hold down dust and stabilize unpaved road surfaces, creating smooth-riding roads that last.


A board fence, wind fence, sediment fence, or similar barrier can control air currents and blow soil. All of these fences are normally constructed of wood. Perennial grass and stands of existing trees may also serve as wind barriers. Barriers prevent erosion by obstructing the wind near the ground and preventing the soil from blowing off-site. Barriers shall be placed at right angles to prevailing wind currents at intervals of about 15 times the barrier height. Solid board fences, snow fences, burlap fences, crate walls, bales of hay and similar material can be used to control air currents and blown soil.


Stone can be an effective dust deterrent for construction roads and entrances or as a mulch in areas where vegetation cannot be established. In areas of high wind, small stones are not as effective as eight-inch stones.

Sweep Equipment

Normally used in highways or paved roads, sweep equipment can be used to clean debris and dust from paved or roadways. I am not a huge fan of this method, as sometimes it seems that more dust is being released into the air rather than sweep or vacuum. However, it is another tool available for you.

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Start feeding Farnam ® SimpliFly ® Feed-Thru Fly Control early in the spring before flies begin to appear and continue feeding throughout the summer and into the fall until cold weather restricts fly activity. This product contains an insect growth regulator which prevents the development of house flies and stable flies in the manure of treated horses, but is not effective against existing adult flies.

In some cases, supplemental fly control measures may be needed in and around paddocks and buildings to control adult house and stable flies which can breed in other decaying vegetable matter or silage on premises, or that migrate in from other areas.

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Beetroot shield — the development of the pest haze and methods of control

First found in North America near Boston, Massachusetts in 1917, European corn borer, Ostrinia nubilalis (Hübner), now has spread as far west as the Rocky Mountains in both Canada and the United States, and south to the Gulf Coast states. European corn borer is thought to have originated in Europe, where it is widespread. It also occurs in northern Africa. The North American European corn borer population is thought to have resulted from multiple introductions from more than one area of Europe. Thus, there are at least two, and possibly more, strains present. This species occurs infrequently in Florida.

Life Cycle and Description (Back to Top)

The number of generations varies from one to four, with only one generation occurring in northern New England and Minnesota and in northern areas of Canada, whereas three to four generations occur in Virginia and other southern locations. In many areas generation number varies depending on weather, and there is considerable adaptation for local climate conditions even within strains. European corn borer overwinters in the larval stage, with pupation and emergence of adults in early spring. Diapause apparently is induced by exposure of last instar larvae to long days, but there also is a genetic component. Moth flights and oviposition usually occur during June-July and August-September in areas with one to two generations annually. In southern locations with three generations, moth flights and oviposition typically occur in May, late June, and August. In locations with four generations, adults are active in April, June, July, and August-September.

Egg: Eggs are deposited in irregular clusters of about 15 to 20. The eggs are oval, flattened, and creamy white in color, usually with an iridescent appearance. The eggs darken to a beige or orangish tan color with age. Eggs normally are deposited on the underside of leaves, and overlap like shingles on a roof or fish scales. Eggs measure about 1.0 mm in length and 0.75 m in width. The developmental threshold for eggs is about 15°C. Eggs hatch in four to nine days.

Figure 1. Eggs, soon after being laid, of the European corn borer, Ostrinia nubilalis (Hübner). Photograph by USDA.

Larva: Larvae tend to be light brown or pinkish gray in color dorsally, with a brown to black head capsule and a yellowish brown thoracic plate. The body is marked with round dark spots on each body segment. The developmental threshold for larvae is about 11°C. Larvae normally display six instars. Head capsule widths are about 0.30, 0.46, 0.68, 1.03, 1.66, and 2.19 mm in instars 1 through 6, respectively. Mean body lengths during the six instars are about 1.6, 2.6, 4.7, 12.5, 14.5, and 19.9 mm, respectively. Young larvae tend to feed initially within the whorl, especially on the tassel. When the tassel emerges from the whorl, larvae disperse downward where they burrow into the stalk and the ear. Mortality tends to be high during the first few days of life, but once larvae establish a feeding site within the plant survival rates improve. Larvae in the final instar overwinter within a tunnel in the stalk of corn, or in the stem of another suitable host. Duration of the instars varies with temperature. Under field conditions development time was estimated at 9.0, 7.8, 6.0, 8.8, 8.5, and 12.3 days for instars 1 through 6, respectively, for a mean total development period of about 50 days, but this varies considerable from year to year according to weather conditions.

Figure 2. Mature larva of the European corn borer, Ostrinia nubilalis (Hübner). Photograph by John L. Capinera, University of Florida.

Pupa: Pupae usually occur in April or May, and then later in the year if more than one generation occurs. The pupa is normally yellowish brown in color. The pupa measures 13 to 14 mm in length and 2 to 2.5 mm in width in males and 16 to 17 mm in length and 3.5 to 4 mm in width in females. The tip of the abdomen bears five to eight recurved spines that are used to anchor the pupa to its cocoon. The pupa is ordinarily, but not always, enveloped in a thin cocoon formed within the larval tunnel. Duration of the pupal stage under field conditions is usually about 12 days. The developmental threshold for pupae is about 13°C.

Adult: The moths are fairly small, with males measuring 20 to 26 mm in wingspan, and females 25 to 34 mm. Female moths are pale yellow to light brown in color, with both the forewing and hind wing crossed by dark zigzag lines and bearing pale, often yellowish, patches. The male is darker in color, usually pale brown or grayish brown, but also with dark zigzag lines and yellowish patches. Moths are most active during the first three to five hours of darkness. The sex pheromone has been identified as 11-tetradecenyl acetate, but eastern and western strains differ in production of Z and E isomers. The preoviposition period averages about 3.5 days. Duration of oviposition is about 14 days, with oviposition averaging 20 to 50 eggs per day. The female often deposits 400 to 600 eggs during her life span. Total adult longevity is normally 18 to 24 days.

Figure 3. Adult male European corn borer, Ostrinia nubilalis (Hübner), pinned specimen. Photograph by John L. Capinera, University of Florida.

Figure 4. Adult female European corn borer, Ostrinia nubilalis (Hübner). Photograph by John L. Capinera, University of Florida

Host Plants (Back to Top)

European corn borer has a very wide host range, attacking practically all robust herbaceous plants with a stem large enough for the larvae to enter. However, the eastern strain accounts for most of the wide host range, the western strain feeding primarily on corn. Vegetables other than corn tend to be infested if they are abundant before corn is available, or late in the season when senescent corn becomes unattractive for oviposition; snap and lima beans, pepper, and potato are especially damaged. In North Carolina, for example, potato is more attractive than corn at peak emergence of the first moth flight, and more heavily damaged. Other crops sometimes attacked include buckwheat, grain corn, hop, oat, millet, and soybean, and such flowers as aster, cosmos, dahlia, gladiolus, hollyhock, and zinnia. Some of the common weeds infested include barnyardgrass, Echinochoa crus-galli; beggarticks, Bidens spp.; cocklebur, Xanthium spp.; dock, Rumex spp.; jimsonweed, Datura spp.; panic grass, Panicum spp.; pigweed, Amaranthus spp.; smartweed, Polygonum spp.; and others. A good list of host plants is given by Caffrey and Worthley (1927).

Natural Enemies (Back to Top)

Native predators and parasites exert some effect on European corn borer populations, but imported parasitoids seem to be more important. Among the native predators that affect the eggs and young larvae are the insidious flower bug, Orius insidious (Say) (Hemiptera: Anthocoridae); green lacewings, Chrysoperla spp. (Neuroptera: Chrysopidae); and several ladybird beetles (Coleoptera: Coccinellidae). Insect predators often eliminate 10 to 20% of corn borer eggs. Avian predators such as downy woodpecker, Dendrocopos pubescent (Linnaeus); hairy woodpecker, Dendrocopos villosus (Linnaeus); and yellow shafted flicker, Colaptes auratus (Linnaeus) have been known to eliminate 20 to 30% of overwintering larvae.

Exotic parasitoids numbering about 24 species have been imported and released to augment native parasitoids. About six species have successfully established. Among the potentially important species is Lydella thompsoni Herting (Diptera: Tachinidae), which may kill up to 30 % of second-generation borers in some areas, but has disappeared or gone into periods of low abundance in other areas. Other exotic parasitoids that sometimes account for more than trivial levels of parasitism are Eriborus terebrans Gravenhorst (Hymenoptera: Ichneumonidae), Simpiesis viridula (Hymenoptera: Eulophidae), and Macrocentris grandii Goidanich (Hymenoptera: Braconidae). A comprehensive review of biological control agents imported in the first half of the 1900s was published by Baker et al. (1949).

Several microbial disease agents are known from corn borer populations. The common fungi Beauveria bassiana and Metarhizium anisopliae are sometimes observed, especially in overwintering larvae. The most important pathogen seems to be the microsporidian Nosema pyrausta, which often attains 30% infection of larvae and sometimes 80 to 95% infection. It creates chronic, debilitating infections that reduce longevity and fecundity of adults, and reduces survival of larvae that are under environmental stress.

Life table studies conducted on corn borer populations in Quebec with a single annual generation perhaps provide insight into the relative importance of mortality factors (Hudon and LeRoux 1986c). These workers demonstrated that egg mortality (about 15%) was low, stable and due mostly to predators and parasites. Similarly, mortality of young larvae, due principally to dispersal, dislodgement, and plant resistance to feeding was fairly low (about 15%) but more variable. Mortality of large larvae during the autumn (about 22%) and following spring (about 42%) was due to a number of factors including frost, disease and parasitoids, but parasitism levels were low. Pupal mortality (about 10%) was low and stable among generations. The factor that best accounted for population trends was survival of adults. Dispersal of moths and disruption of moth emergence by heavy rainfall are thought to account for high and variable mortality (68 to 98%, with a mean of 95%), which largely determines population size of the subsequent generation. Overall generation mortality levels were high, averaging 98.7%.


There are many reports that weather influences European corn borer survival. Heavy precipitation during egg hatch, for example, is sometimes given as an important mortality factor. Low humidity, low nighttime temperatures, and heavy rain and wind are detrimental to moth survival and oviposition. However, during a 10-year, 3-state study, Sparks et al. (1967) reported no consistent relationship between weather and survival.


This is a very serious pest of both sweet corn and grain corn, and before the availability of modern insecticides this insect caused very marked reductions in corn production. Young larvae feed on tassels, whorl and leaf sheath tissue; they also mine midribs and eat pollen that collects behind the leaf sheath. Sometimes they feed on silk, kernels, and cobs, or enter the stalk. Older larvae tend to burrow into the stalk and sometimes the base of the corn ear, or into the ear cob or kernels. Feeding by older larvae is usually considered to be most damaging, but tunneling by even young larvae can result in broken tassels. The presence of one to two larvae within a corn stalk is tolerable, but the presence of any larvae within the ear of sweet corn is considered intolerable by commercial growers, and is their major concern. European corn borer is considered to be the most important sweet corn pest in northern production areas, and second-generation borers are the principal source of ear damage. Heavily tunneled stalks of grain corn suffer from lodging, reducing the capacity for machine harvesting. Lodging is not a serious threat to sweet corn. Boring by corn borers also allows several fungi to affect corn plants.

In crops other than corn, the pattern of damage is variable. European corn borer larvae damage both the stem and fruit of beans, pepper, and cowpea. In celery, potato, rhubarb, Swiss chard, and tomato, it is usually the stem tissue that is damaged. In beet, spinach, and rhubarb, leaf tissue may be injured. Entry of borers into plant tissue facilitates entry of plant pathogens. The incidence of potato blackleg caused by the bacterium Erwinia carotovora atroseptica, for example, is higher in potato fields with stems heavily infested by corn borers. Direct damage by corn borers to potato vines, however, results in negligible yield loss.

Management (Back to Top)

Sampling. Moths can be sampled with blacklight and pheromone traps, and catches by these traps are correlated. Pheromones attract only males, whereas both sexes are captured in traps with a blacklight. Blacklight traps tend to be more reliable, but light traps can capture large numbers of other insects, necessitating a great deal of sorting. Pheromone-baited water pan traps seem to be the most efficient method of adult monitoring. Trap catches are usually used to initiate intensive in-field scouting for egg masses, as moth catches are only roughly correlated with density.

Techniques other than adult capture can be used to estimate borer phenology. Plant phenology can be used to predict corn borer development. Thermal summations are also highly predictive. Moths seek shelter during the daylight hours in dense grass and weeds near corn fields. Flushing moths from such habitats gives an estimate of population densities. Eggs can be sampled by visual examination, but this is a very time-consuming effort.

Insecticides. Liquid formulations of insecticide are commonly applied to protect against damage to corn, particularly from the period of early tassel formation until the corn silks are dry. Recommendations vary from a single application prior to silking, to weekly applications. Liquid applications are usually made to coincide with egg hatch in an effort to prevent infestation. If corn borers are present in a field, however, the critical treatment time is just before the tassels emerge, or at tassel emergence from the whorl. This plant growth period is significant because the larvae are active at this time and more likely to contact insecticide. A popular alternative to liquid insecticides is the use of granular formulations, which can be dropped into the whorl for effective control of first generation larvae because this is where young larvae tend to congregate. Insecticide is more persistent when applied in a granular formulation. In grain corn, insecticide applications for suppression of second generation corn borers can be made outside the corn fields in areas of thick grass, or action sites, where adults tend to aggregate. This approach has not been assessed for sweet corn. For borer suppression on potato, a single application of insecticide timed to coinide with the presence of first instar larvae provides optimal yield.

Cultural practices. Destruction of stalks, the overwintering site of larvae, has long been recognized as an important element of corn borer management. Disking is not adequate; plowing to a depth of 20 cm is necessary for destruction of larvae. Mowing of stalks close to the soil surface eliminates greater than 75% of larvae, and is especially effective when combined with plowing. Minimum tillage procedures, which leave considerable crop residue on the surface, enhance borer survival.

Early planted corn is taller and attractive to ovipositing female moths, so late planting has been recommended, but this is useful mostly in areas with only a single generation per year. If a second generation occurs, such late planted corn is heavily damaged.

Host plant resistance. Extensive breeding research has been conducted, and resistance has been incorporated into grain corn, especially against corn borer populations with only a single annual generation. A principal factor in seedling resistance to young larvae is a chemical known as DIMBOA, which functions as a repellent and feeding deterrent. It has proven difficult to incorporate the known resistance factors into sweet corn without degradation of quality.

Bt corn has become popular in recent years. This is genetically modified corn in which genetic material from a toxin produced by the bacterium Bacillus thuringiensis var. kurstaki is inserted into corn. The expression of the genetic material makes the plant toxic to corn borers and related insects, but not to other animals. Widespread planting of Bt corn has greatly reduced the abundance of European corn borer (Burkness et al. 2001, Hutchinson et al. 2010).

Pepper cultivars differ in their susceptibility to corn borer. Hot pepper cultivars are most resistant, and most green bell peppers are susceptible.

Biological control. Biological control has been attempted repeatedly in sweet corn and other vegetables susceptible to European corn borer attack. Bacillus thuringiensis products can be as effective as many chemical insecticides, but often prove to be less effective than some. Most single-factor approaches, with the exception of newer formulations of Bacillus thuringiensis, have proven to be erratic. Release of native Trichogramma spp. (Hymenoptera: Trichogrammatidae), for example, provides variable and moderate levels of suppression.

Selected References (Back to Top)

  • Baker WA, Bradley WG, Clark CA. 1949. Biological control of the European corn borer in the United States. USDA Technical Bulletin 983. 185 pp.
  • Beck SD. 1987. Developmental and seasonal biology of Ostrinia nubilalis. In Russell GE (ed.). Agricultural Zoology Reviews, Vol. 2. Intercept, Wimborne, Dorset.
  • Burkness, E.C., W.D. Hutchinson, P.C. Bolin, D.R. Bartels, D.F. Warnock, and D.W. Davis. 2001. Field efficacy of sweet corn hybrids expressing a Bacillus thuringiensis toxin for management of Ostrinia nubilalis (Lepidoptera: Crambidae) and Helicoverpa zea (Lepidoptera: Noctuidae). Journal of Economic Entomology 94: 197-203.
  • Caffrey DJ, Worthley LH. 1927. A progress report on the investigations of the European corn borer. USDA Bulletin 1476. 154 pp.
  • Capinera JL. 2001. Handbook of Vegetable Pests. Academic Press, San Diego. 729 pp.
  • Hudon M, LeRoux EJ. 1986a. Biology and population dynamics of the European corn borer (Ostrinia nubilalis) with special reference to sweet corn in Quebec. I. Systematics, morphology, geographical distribution, host range, economic importance. Phytoprotection 67: 39-54.
  • Hudon M, LeRoux EJ. 1986b. Biology and population dynamics of the European corn borer (Ostrinia nubilalis) with special reference to sweet corn in Quebec. II. Bionomics. Phytoprotection 67: 81-92.
  • Hudon M, LeRoux EJ. 1986c. Biology and population dynamics of the European corn borer (Ostrinia nubilalis) with special reference to sweet corn in Quebec. III. Population dynamics and spatial distribution. Phytoprotection 67: 93-115.
  • Hudon M, LeRoux EJ, Harcourt DG. 1989. Seventy years of European corn borer (Ostrinia nubilalis) research in North America. In Russell GE. (ed.). Agricultural Zoology Reviews. Vol. 3. Intercept, Wimborne, Dorset, UK.
  • Hutchinson, W.D., E.C. Burkness, P.D. Mitchell, R.D. Moon, T,W Leslie, S.J. Fleischer, M. Abrhahamson, K.L. Hamilton, K.L.Steffey, M.E. Gray, R.L. Hellmich, L.V. Kaster, T.E. Hunt, R.J. Wright, K. Pecinosvsky, T.L. Rabaey, B.R. Flood, and E.S. Raun. 2010. Areawide suppression of European corn borer with Bt maize reaps savings to non-Bt maize growers. Science 330 :222-225.
  • Nault BA, Kennedy GG. 1996a. Timing insecticide applications for managing European corn borer (Lepidoptera: Pyralidae) infestations in potato. Crop Protection 15: 465-471.
  • Nault BA, Kennedy GG. 1996b. Sequential sampling plans for use in timing insecticide applications for control of European corn borer (Lepidoptera: Pyralidae) in potato. Journal of Economic Entomology 89: 1468-1476.
  • Nault BA, Kennedy GG. 1996c. Evaluation of Colorado potato beetle (Coleoptera: Chrysomelidae) defoliation with concomitant European corn borer (Lepidoptera: Pyralidae) damage on potato yield. Journal of Economic Entomology 89: 475-480.
  • Rice ME, Pilcher CD. 1998. Potential benefits and limitations of transgenic Bt corn for management of the European corn borer. American Entomologist 44: 75-78.
  • Sparks AN, Chiang HC, Triplehorn CA, Guthrie WD, Brindley TA. 1967. Some factors influencing populations of the European corn borer, Ostrinia nubilalis (Hübner) in the north central states: resistance of corn, time of planting and weather conditions Part II, 1958- 1962. Iowa Agricultural Experiment Station Research Bulletin 559. 103 pp.

Author: John L. Capinera, Entomology and Nematology Department, University of Florida
Photographs: John L. Capinera, University of Florida; Jim Kalisch, Tom Hunt and Tom Clark, University of Nebraska — Lincoln; and USDA
Web Design: Don Wasik, Jane Medley
Publication Number: EENY-156
Publication Date: September 2000. Reviewed: February 2014. Latest Revision: June 2017.

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