Insect pests and natural enemies associated with cabbage in the coastal belt of Orissa.
Weekly surveys were conducted to record the insect pests, predators and parasitoids associated with cabbage in three districts of Orissa, India (Cuttack, Khurda and Nayagarh) during 1999-2000 and 2000-01. Out of the 21 species of insect pests recorded, six species, i.e. Lipaphis erysimi, Myzus persicae, Brevicoryne brassicae, Spodoptera litura, Crocidolomia binotalis [Crocidolomia pavonana] and Plutella xylostella, were intimately associated with the cabbage crop maintaining high population. Twelve species of predators and five species of parasitoids exerted significant repressive pressure on the population growth of the cabbage pests. Among the predatory fauna, Coccinella repanda [Coccinella transversalis], Cheilomenes sexmaculata and Ischiodon scutellaris were found in abundant numbers. Four species of parasitoids, Dolichogenidea sp., Chelonus sp., Cotesia pratapae and Aphidencyrtus aphidivorus were of major importance.