Mechanische und physiologische Abwehrreaktionen einiger Blattlausarten [Aphididae] gegen Schlupfwespen [Hymenoptera]

It was known from earlier experiments thatRhopalomyzus ascalonicus (Donc.) encapsulated the eggs andRhopalosiphoninus staphyleae (Koch) ssp.tulipaellus Theob. the larvae ofAphelinus semiflavus How., but, on the other hand, the mechanical defence reactions of both aphids against the parasite appeared to be conspicuously weak. These experiments were now… (More)