Managing Spodoptera Species (Lepidoptera: Noctuidae) Found in Brazilian Soybean Fields with Bt Soybean and Insecticides

Genetically modified (GM) soybeans expressing Cry1A.105/Cry2Ab2/Cry1Ac (event MON 87701 × 89788 87751 87708) and Cry1Ac 89788) from Bacillus thuringiensis Berliner (Bt) are valuable technologies for managing key lepidopteran pests of soybean in South America, but do not provide stand-alone protection against Spodoptera species. Here, we evaluated the use these Bt their integration with insecticides provided reasonable levels S. cosmioides, albula, eridania. However, frugiperda had higher survival on this soybean, showed low lethality all species evaluated. larvae that survived non-Bt comparable susceptibility to flubendiamide thiodicarb diet-overlay bioassays. Regardless plant type, field doses were effective controlling surviving larvae. We conclude is cosmioides also has control eridania, frugiperda. poor Nonetheless, both controlled by thiodicarb. Thus, integrated tactics would management fields America.