Journal of Biological Control

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Studies conducted on the natural enemies of Pieris brassicae (Linnaeus) in the mid-hill region of Himachal Pradesh, revealed that mortality caused by hymenopteran parasitoids,  Cotesia glomeratus (Linnaeus) and Hypersota ebeninus Gravenhorst ranged between 3.9-23.6% with its peak during mid April, while the mortality due to bacterial pathogens viz., Bacillus sp. and Serratia marcescens Bizio varied between 1.2-23.7%. Predators like Episyrphus balteatus (de Geer), Coccinella septempunctata Linnaeus and Polistes hebreus (Fabricius) though active, their role in suppressing the population of P. brassicac was negligible. The role of meteorological factors in the dynamics of natural enemies is also discussed.

Keywords

Abiotic Factor, Parasitoids, Pathogens, Pieris brassicae, Predators, Seasonal Activity.
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