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Survival in the laboratory of Mastrus ridens Horstmann (Hymenoptera: Ichneumonidae) reared on larvae of Cydia pomonella (Linnaeus) (Lepidoptera: Tortricidae) and five species of non-target Tortricidae was compared. Clutch size (numbers of eggs per host larva) and survival were higher on codling moth than on non-target species, and most adults reared from non-target larvae were smaller. F2 generation...
The host-acceptance and oviposition behaviours of Mastrus ridens Horstmann (Hymenoptera: Ichneumonidae) on cocooned codling moth (Cydia pomonella (Linnaeus) (Lepidoptera: Tortricidae) and non-target tortricid larvae were characterised. Acceptance appeared to result from analysis of kairomones in the silken cocoon and not from the size or movement of the larva within. No larva of three non-target species...
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