Plant volatiles enhance behavioral responses of grapevine moth males, Lobesia botrana to sex pheromone.
Plant volatiles play an important role in the lives of phytophagous insects, by guiding them to oviposition, feeding and mating sites. We tested the effects of different host-plant volatiles on attraction of Lobesia botrana males to the female-produced sex pheromone, in a wind tunnel. Addition of volatile emissions from grapevines or individual plant volatiles to pheromone increased the behavioral responses of L. botrana males over those to pheromone alone. At a low release rate (under-dosed) of pheromone, addition of (E)-β-caryophyllene, (Z)-3-hexenyl acetate, 1-hexanol, or 1-octen-3-ol increased all behavioral responses, from activation to pheromone source contact, while addition of (E)-4,8-dimethyl-1,3,7-nonatriene, (E)-β-farnesene, (Z)-3-hexenol, or methyl salicylate affected only the initial behavioral responses. Dose-response experiments suggested an optimal release ratio of 1:1000 (sex pheromone: host plant volatile). Our results highlight the role of plant volatiles in the sensory ecology of L. botrana.
Institute of Biology, Faculty of Sciences, University of Neuchâtel, Neuchâtel, Switzerland.
Martin
M
von Arx
Daniela
D
Schmidt-Büsser
Patrick M
PM
Guerin
D000818:Animals; D004305:Dose-Response Relationship, Drug; D004357:Drug Synergism; D005260:Female; D008297:Male; D009036:Moths / Q000187:drug effects*; D012724:Sex Attractants / Q000494:pharmacology*; D012726:Sexual Behavior, Animal / Q000187:drug effects*; D027843:Vitis / Q000737:chemistry*; D055549:Volatile Organic Compounds / Q000494:pharmacology*
D012724:Sex Attractants; D055549:Volatile Organic Compounds