D3102: Beet armyworm in peanut: Pest origin, predominance of occurrence, and insecticide susceptibility

Monday, November 11, 2024

9:00 AM – 5:00 PM MST

Location: Phoenix Convention Center, Exhibit Hall 6, PCC

Presenting Author(s)

JT

Joao Gabriel Tardin de Moraes

University of Florida
Jay, Florida

Co-Author(s)

SP

Silvana V. Paula-Moraes

PhD Entomology AG- WFREC-JAY
University of Florida
Jay, Florida
EG

Eliseu José Guedes Pereira

Universidade Federal de Vicosa
Vicosa, Minas Gerais, Brazil
Isaac L. Esquivel

Assistant Professor
North Florida Research and Education Center
Quincy, Florida
ES

Eduardo S. Soares

Adjunct Assistant Professor
University of Florida
Pensacola, Florida

Research-driven knowledge is needed to develop IPM and insect resistance management tactics for beet armyworm (BAW), a pest with increasing occurrence in peanut. In 2020, resistance of beet armyworm to chlorantraniliprole was first reported in populations collected in the Florida Panhandle. This region is expected to be an overwintering zone and interbreeding region possibly receiving migratory populations. The objective of this study was to estimate the occurrence of beet armyworm based on an inventory of lepidopteran pests associated with the peanut, the current susceptibility to insecticide chlorantraniliprole, and estimate of the origin of populations based on hydrogen isotopic signatures. The species inventory was performed in samples collected in commercial fields in the Florida Panhandle, in at least three equidistant points randomly selected and sampled in each field with ground cloth. The larvae species and number were recorded. The insecticide susceptibility was estimated using concentration-mortality bioassays, using with field and laboratory susceptible populations. Moths recovered from sex pheromone traps with BAW lure were submitted to stable hydrogen isotopic ratio (δ2H) in wing tissue to infer migratory patterns and estimate the native origins of this species. The results will be discussed considering the contributions to IPM and insect resistance of this species in producing regions of peanut in the southeastern U.S.