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Q&A ViewAttendees 4

Plant-Insect Ecosystems

10-Minute Paper

P-IE: Chemical Ecology

Trapping soybean looper, Chrysodeixis includens (Lepidoptera: Noctuidae), in the southeastern USA and implications for pheromone-based research and management

Tuesday, November 2, 2021
4:06 PM – 4:18 PM MT
Location: Colorado Convention Center, Meeting Room 108-110
In-Person

Chrysodeixis includens is an important pest of soybean and other crops in the Americas and has become difficult to manage due to insecticide resistance. Novel strategies, such as pheromone-mediated mating disruption, for its management are needed. Mating disruption relies heavily on measurement of male trap capture suppression to evaluate its efficacy; therefore, having the proper blend of pheromone in a lure and an effective trap is needed. We conducted trials in the United States to evaluate the response of C. includens populations to two commercially available traps and three commercially available pheromone lures. Trap capture rates for universal moth traps were generally greater than the rates for delta traps regardless of lure type. Trap capture rates for both trap types were greater for traps baited with Bio Pseudoplusia and Alpha Scents lures, which contain little to no (Z)-7 dodecenyl esters, than in traps baited with Scentry lures, which are comprised of >7% esters. However, capture rates of the non-target species, Ctenoplusia oxygramma, were less in both trap types when baited with Scentry lures versus Alpha Scents or Bio Pseudoplusia. These data provide evidence that commercial lures for C. includens may differ in their effectiveness to capture male C. includens due to the presence or absence of esters, but that the presence of the esters may also reduce non-target species captures. The importance of minor pheromone components must be considered when developing mating disruption products across geographies.