Coupled gas chromatographic–electroantennographic detection analysis of scale volatile extracts revealed numerous compounds that elicited responses from male or female A. pomonella were also attractive to male A. quadridentata were attracted to Porapak Q-collected volatiles from female C. In Y-tube olfactometer bioassays, female A. 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.
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