Submitted to: Agricultural and Forest Entomology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 8/13/2003
Publication Date: 11/15/2003
Citation: Landolt, P.J., Smithhisler, C.L., Adams, T., Zack, R.S. 2003. An improved multi-component sex attractant for trapping male western yellowstriped armyworm, Spodoptera praefica (Grote) (Lepidoptera: Noctuidae). Agricultural and Forest Entomology. 5:333-339. Interpretive Summary: New methods and approaches are needed to control insect pests without the use of pesticides that are hazardous to people and the environment. Scientist at the USDA-ARS Yakima Agricultural Research Laboratory are researching attraction responses of insects as part of a program to develop lures, traps and baits for monitoring and controlling pest on vegetable forage and vegetable crops, including potato. The female -produced pheromone of the adult was characterized and a sex attractant was developed based on the pheromone chemistry, This attractant provides an much -improved lure for trapping western yellow- striped armyworm, to monitor its presence and abundance in agricultural crops. Monitoring information is used in making pest management decisions by farmers and agricultural consultants.
Technical Abstract: Chemical analysis of solvent extracts of abdominal glands of female western yellowstriped armyworm moths, Spodoptera praefica (Grote), indicated the presence of (Z)7-dodecenol,(Z)7-dodecenyl acetate, (Z)-9-tetradecenyl acetate and (Z) -11-hexadecenyl acetate. In field tests, traps baited with the 3-component blend comprised of (Z) -7-dodecenyl acetate, (Z)-9-tetradecenyl acetate and (Z)-11 hexadecenyl acetate captured numbers of male S. praefica, indicating indicating sexual attraction. Addition of (Z)-7 dodecenol to that blend did not significantly affect lure attractiveness to males. Omission of (Z) -9- tetradecenyl acetate from the 3 component blend significantly reduced lure attractiveness to males, while omission of (Z)-7 dodecenyl acetate eliminated the capture of males in traps. Omission of (Z)-11 hexadecenyl acetate from the 3 component blend did not affect number of males captured. The 4-component blend that included (Z)-7-dodecenyl alcohol attracted more Autographa california (Speyer) moths, but fewer moths of several other species that were attracte to the partial blends. The combination of (Z)-7-dodecenyl acetate and (Z)-9-tetradecenyl acetate comprises an attractive sex pheromone of female S.praefica and provides an improved attractant for use in trapping males.