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Biology of nippolachnus piri infesting pear pyrus communis in west bengal india

Biology of nippolachnus piri infesting pear pyrus communis in west bengal india

Entomon 6(3): 229-232

ISSN/ISBN: 0377-9335

N. piri (Matsumura) is 1 of the important aphid pests occurring on pear (Pyrus communis) in Kalimpong, West Bengal. It occurs throughout the year on pear but the infestation becomes serious during July-Oct. It completes .apprx. 19 generations/yr under laboratory conditions. It passes through 4 nymphal instars before becoming an adult. All stages are prolonged during the cooler period of the year. The nymphal duration ranges from 13-26 days and adult longevity of the apterous morph varies from 10-34 days. The reproductive capacity also exhibits variation.

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