Der Parasitoidenkomplex des Schwammspinners Lymantria dispar L. (Lep.,Lymantriidae) in Populationen hoher, mittlerer und niederer Dichte im Burgenland

Müncheberg

1995

S. 195-198

Bandaufführung

189237

Investigations on the parasitoid complex of Lymantria dispar L. were carried out in 1992 and 1994 at three mixed oak stands with gypsy moth populations at different levels near Eisenstadt, Burgenland (Austria). Gypsy moth egg masses, larvae and pupae were collected stage specific, reared at the laboratory and checked for parasitoid emergence. At the latency site L. dispar egg masses were exposed. Parasetigena silvestris (Robineau-Desvoidy) (Dipt., Tachinidae) was the dominant parasitoid at the gradation and the progradation site. Blepharipa pratensis (Meigen) (Dipt., Tachinidae) was the major parasitoid of the collected pupae. The rates of total parasitism were low at the gradation site during the culmination of the population but increased in the postculmination year. At the latency site the exposed hosts were parasitized frequently. Glyptapanteles liparidis (Bouche) (Hym., Braconidae) was the dominant species there. Total parasitism was higher than at the other sites. Other frequently recovered larval parasitoids were: Glyptapanteles porthetriae (Muesebeck) (Hym., Braconidae), Phobocampe pulchella Thoms. and Phobocampe unicincta (Gravenhorst) (Hym., Ichneumonidae). Cotesia ocneriae (Ivanov) (Hym., Braconidae) was recovered at the latency site for the first time in Austria. No parasitoids of gypsy moth egg masses were found.