The effect of cruciferous vegetables on occurrence of Cecidomyiidae, Coccinellidae and Chrysopidae predators in colonies of cabbage aphid (Brevicoryne brassicae L.)
2005
Jankowska, B. (Krakow Agricultural University (Poland). Dept. of Plant Protection), E-mail: [email protected]
In 1993-97 the occurrence of cabbage aphid (Brevicoryne brassicae L.) and predators from Cecidomyiidae, Coccinellidae and Chrysopidae was observed on the nine different late cabbage vegetables, Savoy cabbage cv. Vertus, white cabbage cv. Amager, red cabbage cv. Langendijker, brussel sprouts cv. Maczuga, cauliflower cv. Pionier, blue kohlrabi cv. Maslowa, white kohlrabi cv. Delikates, kale cv. Zielony Kedzierzawy and broccoli cv. Piast. Among the examined predators only the cecidomyiid - Aphidoletes aphidimyza Rond. (Cecidomyiidae) played an important role in reducing the number of cabbage aphids. The cruciferous species had no impact on the density of A. aphidimyza population, and females laying eggs. The size of aphid colonies on cabbage leaves played the most important role
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