Cotton and corn are threatened by growing resistance in the pest Helicoverpa zea (a.k.a. bollworm or corn earworm) to the insecticidal properties of Bt crops. Two researchers identify contributing factors and identify insecticide resistance management practices that could help slow the problem.
Should growers that use Bt crops plant a separate nearby refuge field of non-insecticidal crops, or use a blended mixture of seeds that produce both in the same field?
By Andrew Porterfield The fall armyworm (Spodoptera frugiperda) is a major corn pest in South America, known to devour corn crops from Argentina to the Southeastern United States. Farmers have […]
Add “crop pests developing resistance to control methods faster” to the list concerning potential effects of global warming. Entomologists at the Environmental Protection Agency (EPA) and the University of Maryland […]
By Josh Lancette A new study from North Carolina found that corn growers in the state are not planting as much refuge crop as needed, potentially leading to increased insect […]
By Josh Lancette When using Bt crops, a constant concern is preventing insect pests from becoming resistant. According to a paper published in the Journal of Economic Entomology that contains […]
Bt crops are plants that have been genetically-engineered to produce proteins that are harmless to humans but are toxic to some devastating insect pests. The proteins are produced by genes […]