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Q&A ViewAttendees 5

Physiology, Biochemistry, and Toxicology

10-Minute Paper

PBT: Biochemistry and Entomophagy

Field-evolved resistance of the fall armyworm (Spodoptera frugiperda) (J.E. Smith) (Lepidoptera: Noctuidae) from Puerto Rico to pyrethroids: The role of broad detoxification enzymes

Monday, November 1, 2021
2:42 PM – 2:54 PM MT
Location: Colorado Convention Center, Meeting Room 403-404
In-Person
The fall armyworm (FAW) (Spodoptera frugiperda J.E. Smith) is a global pest causing severe crop damage in the Americas, Asia, Africa, and Oceania continents. Its extensive polyphagia, migratory ability, multiple generations per year, and intense pesticide selection pressure had resulted in the resistance to 40 active ingredients from among eight different modes of action (www.pesticideresistance.org). Characterizing the field-evolved resistance to pesticide and the mechanism of resistance is crucial for implementing an adequate IRM plan to prevent economic impacts. We had detected field evolved resistance of FAW to pyrethroids (esfenvalerate) in Puerto Rico using overlay-diet bioassays with resistance ratios (RR50) 59-fold and 102-fold (RR90) compared to a susceptible population. These resistance levels had resulted in “practical resistance.” In this talk, we discuss the FAW field-evolved resistance and the role of detoxification enzymes (P450s, esterases, glutathione transferases, and ABC transporters) in the resistance of fall armyworm from Puerto Rico to esfenvalerate. These results have practical implications for IRM in Puerto Rico and globally.