Beobachtungen bei einer Massenvermehrung des Eichenerdflohs, Altica quercetorum Foud. (Coleopt., Chrysomelidae) 1992 bis 1995 in Serbien

2000

S. 127-128

10 Lit. Ang.

Unselbständiges Werk

200070036

Four about 10 years the oak flea beetle, Altica quercetorum Foud. has shown outbreaks at numerous localities in Central and South Serbia. Our observations revealed that the pest preferred mixed stands of sessile and Turkey oaks under nearer preference of the first named oak. Defoliation was caused by the adult insects in early spring, followed by leaf skeletonizing by larvae. In September that adults of the new generations started their secondary feeding. Also a threefold defoliation partly took place during the mass occurrence, in the course of one vegetation period. Outbreaks of this size are new for Serbia. Our researches between 1992 and 1995 deal with the bionomy, gradation and economic importance. The following predators and parasitoids were recorded: Zicrona coerulea L. (Hem., Pentatomidae), Oenopia impustulata L. (Col, Coccinellidae), Microctonus sp. (Hym., Braconidae), Mesochorus palus Schw. (Hym., Ichneumonidae), and Medina luctuosa Meig. (Dipt., Tachinidae).