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Student 10-Minute Presentation

Physiology, Biochemistry, and Toxicology

Student

Student Competition

Grad 10-min Competition: PBT, Chemical Ecology and Toxicology

Insecticide susceptibility of Helicoverpa zea (Lepidoptera: Noctuidae) on a continental scale in the U.S. and implications for IPM and pest invasive survey programs

Monday, November 11, 2024
11:30 AM – 11:42 AM MST
Location: Phoenix Convention Center, 126 B, PCC
Oral Presentation Student Competition
Helicoverpa zea, commonly known as corn earworm presents significant economic challenges to various crops across the U.S. Their feeding on a wide range of hosts impacts major crops like cotton, corn, soybean, and vegetables causing losses due to direct damage and control costs. The occurrence of invasive H. armigera in South and Central America has been documented raising concerns about its potential spread and establishment in new regions. In addition, the possible introgression between H. armigera with the native H. zea poses an imminent threat to agricultural productivity and sustainability. The use of insecticides, including pyrethroids, is still widely adopted to manage H. zea. In a scenario with introgressions with H. armigera, there is an expected increase of resistant alleles in populations of H. zea to insecticides. This resistance threatens the effectiveness of management tactics in IPM programs. The objective of this study was to provide an overview of current susceptibility of H. zea to pyrethroids on a continental scale, including populations from overwintering regions from the Cotton Belt and north-summer populations in the Corn Belt. The results will be discussed considering their contribution to IPM and IRM strategies for effective management and mitigation further spread of resistance.