Behavioral and Ontogenic Significances of psylla pyri,Parasitoid Prionomitus mitratus under Laboratory conditions ,revealed that the adult female identify noneparasitized fifth instar nymph of her host by antennae. After several attempts,she rids her host and insert her oviposition in the dorsum of its abdomen. This enable her to feed from hemolymph of her victim, the nymph becomes partilly Paralized. Then she search suitable location of host body by her tarsi and then insert her ovopositor under wing pad for egg laying.Each nymphcaries only one parasitoid and it becomes partilly swolien and rather gentel in its behavior.The parasitized nythph will be attached to leaf surface or underneath barks,by certain larval secretion when the latter is full grown.
It uses the brownish host exuvium as shelter
Anatomic studies show that the parasitoid larva feeds on hemolymph in first instar,and live free in body cavity.
The second instar larva feeds in fat tissues around alimentary canal and full grown larva in all internal organs which cause death of the nymph and its attachment to substrate.
Larval respiration takes place by two longitudinal tubes attached to the posterior spiral of its host. Its body surface is covered with a stomocal gland. secretion called (Game).
The head of full grown larva inside of host body is located caved.
While the host looks swollen and light brown in color ,which is easily distinguished from healthy ones.
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