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Attractiveness of Harlequin Bug, Murgantia histrionica, Aggregation Pheromone: Field Response to Isomers, Ratios, and Dose

Donald C. Weber, Guillermo Cabrera Walsh, Anthony S. DiMeglio, Michael M. Athanas, Tracy C. Leskey, Ashot Khrimian
Journal of chemical ecology 2014 v.40 no.11-12 pp. 1251-1259
Murgantia histrionica, dose response, insect attractants, trapping, aggregation pheromones, host plants, males, plant-insect relations, synthetic hormones, bioassays, pests, nymphs, stereoisomers, structure-activity relationships, trap crops, imagos, application rate, females, North America
A two-component pheromone, (3S,6S,7R,10S)- and (3S,6S,7R,10R)-10,11-epoxy-1-isabolen-3-ol (murgantiol), present in emissions from adult male harlequin bugs, Murgantia histrionica, is most attractive in field bioassays to adults and nymphs in the naturally occurring ratio of ca. 1.4:1. Each of the two individual synthetic stereoisomers is highly attractive to male and female adults and nymphs, but is more attractive in combination and when deployed with a harlequin bug host plant. Blends of 8 stereoisomers also are highly attractive, suggesting that isomers not found in the natural pheromone are not repellent. Deployment of an inexpensive non-stereospecific synthetic pheromone holds promise for efficient trapping and/or use in trap-crops for this important pest in North America.