Producers may have additional biological pesticides to add to their arsenal of control methods for pests such as corn earworm and cotton bollworm, said a Texas A&M AgriLife Extension Service entomologist in Amarillo.
A producer’s pesticide options may be limited by product cost, effective classes, pest resistance, and the impact of a pesticide on beneficial populations or possible flaring of other pests, said Dr. Ed Bynum, so they are always looking for something new to use.
Now new products of the same NPV are being marketed as Heligen, Helicovex and Gemstar. These products are specific to larval stages of Helicoverpa, also known as corn earworm, cotton bollworm, tomato fruitworm, soybean podworm and sorghum headworm and Heliothis virescens, aka tobacco budworm.
Numerous NPVs have been identified for different lepidopteran insects, but each NPV is specific to a particular insect host or narrow range of hosts, Bynum said.
There is an NPV marketed as Fawligen that is specific to Spodoptera larvae, which are fall armyworm and beet armyworm. Another NPV product, Loopex, is specific to the cabbage looper, Trichoplusia ni. All of the NPV products will not infect other insects or arthropods, including pests and beneficial predators and parasites.
Bynum said there is no current data on the effectiveness of NPV product applications for control of the above listed pest species with field crops in the Texas High Plains.
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