Midwest corn farm. Why It Matters
says John Fietsam, Bayer North American corn systems lead. ”It attacks Southwestern corn borer, black cutworm, western bean cutworm and others too.” The Ripple Effect If the last remaining effective trait against corn earworm fails, it's possible cotton growers could begin spraying as much pesticide as they did in the years before Bt traits were introduced. “While there‘s certainly some validity to the argument that if the VIP trait isn't in corn you might see extended durability in cotton, we saw 20 years of success with Cry1 traits, and we think we can achieve that durability with VIP in corn,” says Nick Storer, Corteva Agriscience global regulatory advocacy leader. Farmers need to employ tactics of insect resistance management (IRM) and integrated pest management (IPM) as appropriate to control this pest. It is generally advisable that farmers spray for pest control when economic thresholds are triggered. ”Best management practices include scouting fields for insect pests, appropriate insecticide applications and crop rotations,” says Tim O'Brien, Syngenta commercial traits manager. “When combined with proper refuge, these can help slow down insect resistance to Bt traits.” More pesticide application puts additional selection pressure on those modes of action, continuing a cycle of resistance.