Folia Horticulturae

Current issue content   Search      

Species composition of ladybirds (Col., Coccinellidae) on hazelnut plantations

Magdalena Gantner, Bożenna Ja¶kiewicz

Department of Entomology
Agricultural University
Króla Leszczyńskiego 7, 20-069 Lublin, Poland

During the years 1994-1996 studies on species composition and the number of Coccinellidae were carried out on an intensively protected hazel plantation and on an unprotected one. On both localities, 14 species of ladybirds were found, the most numerous being Propylea quatuordecimpunctata (L.) and Coccinella septempunctata L. Throughout the vegetative season, coccinellids occurred in 2 or 3 peaks in number, while at the same time the maximum number of aphids feeding on hazel leaves occurred once. Ladybirds, especially Propylea quatuordecimpunctata (L.) and Coccinella septempunctata L., play a significant role in controlling the number of hazel aphids in early spring. If the population of these pests is low, it does not seem justified to use insecticides. On the other hand, in the years that favour the growth of aphids, the threshold of harm may be surpassed and chemical treatments must be applied.

Gantner M., Ja¶kiewicz B., 2001. Species composition of ladybirds (Col., Coccinellidae) on hazelnut plantations. Folia Horticulturae 13/1: 91-100.