Moth scale-derived kairomones used by egg-larval parasitoid Ascogaster quadridentata to locate eggs of its host, Cydia pomonella
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| Authors: | DeLury, NC; Gries, R; Gries, G; Judd, GJR; Khaskin, G |
| Year: | 1999 |
| Journal: | Journal of Chemical Ecology 25: 2419-2431 |
| Title: | Moth scale-derived kairomones used by egg-larval parasitoid Ascogaster quadridentata to locate eggs of its host, Cydia pomonella |
| Abstract: | We determined that location of host (Cydia pomonella) eggs by Ascogaster quadridentata is mediated by kairomones, investigated potential sources of the kairomones and identified a blend of kairomones from the source that was attractive to A. quadridentata. In Y-tube olfactometer bioassays, female A. quadridentata were attracted to Porapak Q-collected Volatiles from female C. pomonella scales and eggs, but not to C. pomonella sex pheromone. Scales of C. pomonella were also attractive to male A. quadridentata. Coupled gas chromatographic-electroantennographic detection analysis of scale volatile extracts revealed numerous compounds that elicited responses from male or female A. quadridentata antennae, including heptanal, octanal, nonanal, decanal, undecan-2-one, dodecanal, pentadecan-2-one, (Z)-6-pentadecen-2-one, (Z)-9-hexadecenal, (Z)-6-heptadecen-2-one, and 3,7,11-trimethyl-2E,6E,10-dodecatrien-1-ol acetate. A synthetic blend of these compounds at quantities and ratios equivalent to Porapak Q scale volatile extract was attractive to female A. quadridentata in a Y-tube olfactometer bioassay. |
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