Entomology

Impact of Cover Crop Planting and Termination Dates on Arthropod Activity in the Following Corn

Relative to fallow-cash crop rotations, the addition of a cover crop can contribute to greater plant diversity and has the potential to conserve predatory arthropods. The transition of arthropods from a cover crop to a subsequent cash crop depends on …

Characterizing the sublethal effects of SmartStax PRO dietary exposure on life history traits of 1the western corn rootworm, Diabrotica virgifera virgifera LeConte

The western corn rootworm (WCR), Diabrotica virgifera virgifera LeConte, is an economically important pest of field corn (Zea mays L.) across the United States (U.S.) Corn Belt. Repeated use of transgenic hybrids expressing Bacillus thuringiensis …

Impact of the Timing and Use of an Insecticide on Arthropods in Cover-Crop-Corn Systems

Cover crops provide a habitat for pests and beneficial arthropods. Unexpected pest pressure in a cover-crop-to-corn system can occur and result in increased use of insecticides. Eight site-years of on-farm field studies were conducted in 2019, 2020, …

Evidence of western corn rootworm (Diabrotica virgifera virgifera LeConte) field‐evolved resistance to Cry3Bb1 + Cry34/35Ab1 maize in Nebraska

BACKGROUND: Western corn rootworm (WCR; *Diabrotica virgifera virgifera*) field evolved resistance to transgenic maize expressing the Cry3Bb1 protein derived from *Bacillus thuringiensis* (Bt) has been confirmed across the United States Corn Belt. …

Cardenolide, Potassium, and Pyrethroid Insecticide Combinations Reduce Growth and Survival of Monarch Butterfly Caterpillars (Lepidoptera: Nymphalidae)

The monarch butterfly, Danaus plexippus L., has evolved to be insensitive to milkweed cardenolides via genetic modifications of Na+/K+-ATPase. There is concern for insecticide exposures near agriculture, with little information on monarch caterpillar …

Characterizing the Relationship Between Western Corn Rootworm (Coleoptera - Chrysomelidae) Larval Survival on Cry3Bb1-Expressing Corn and Larval Development Metrics

The western corn rootworm, Diabrotica virgifera virgifera LeConte (Coleoptera - Chrysomelidae), is a significant pest of field corn, Zea mays L. (Poales - Poaceae), across the United States Corn Belt. Widespread adoption and continuous use of corn …

Effects of intraguild interactions on Anticarsia gemmatalis and Chrysodeixis includens larval fitness and behavior in soybean

BACKGROUND Crop pest management requires an understanding of the complex interactions among species that potentially impact crop yield. In soybean, the velvetbean caterpillar, Anticarsia gemmatalis (Hübner), and the soybean looper, Chrysodeixis …

Western Bean Cutworm Flight Pattern

Final Structural Equation Modeling project using Latent Growth Curves to explore the flight patterns of Western Bean Cutworms in Nebraska.