Susceptibility of Brazilian populations of Rachiplusia nu (Lepidoptera: Noctuidae) to insecticides and determination of diagnostic concentrations for a proactive resistance management program.

Background: The sunflower looper, Rachiplusia nu (Guenée), evolved resistance to the insecticidal protein Cry1Ac expressed in soybean and emerged as an important soybean pest in Brazil, requiring the application of insecticides for their control. Here, we characterized the susceptibility of Brazilian populations of R. nu to several insecticides and developed diagnostic concentrations for a proactive insect resistance management (IRM) program.

Characterizing the differential susceptibility and resistance to insecticides in populations of Chrysodeixis includens and Rachiplusia nu (Lepidoptera: Noctuidae) in Brazil.

Background: Chrysodeixis includens (Walker) and Rachiplusia nu (Guenée) are major Plusiinae pests of soybean in the Southern Cone region of South America. In recent decades, C. includens was the main defoliator of soybean in Brazil, but from 2021 onwards, R.

Dose Effects of Flubendiamide and Thiodicarb against Species Developing on Bt and Non-Bt Soybean.

An increase in species was reported in Bt soybean fields expressing Cry1Ac insecticidal proteins in Brazil, requiring additional management with chemical insecticides. Here, we evaluated the dose effects of flubendiamide and thiodicarb on (Walker, 1858), (Stoll, 1782), (Walker, 1857) and (J. E.

Intra- and Interspecific Variation in the Susceptibility to Insecticides of Stink Bugs (Hemiptera: Pentatomidae) That Attack Soybean and Maize in Southern Brazil.

This study evaluated intra- and interspecific variation regarding the susceptibility to insecticides of key pentatomid pests of soybean (Glycine max L.) and maize (Zea mays L.) crops in Brazil.