Research Article
Shoot Borer, Hypsipyla robusta Moore (Lepidoptera: Pyralidae) Infestation on Chukrasia velutina Wight et Arn. in Hilly Areas of Bangladesh

Hossain M.A., M.M. Hossain, A.K. Azad and M.A. Islam

Pakistan Journal of Biological Sciences, 2004, 7(5), 848-851.

Abstract

The nature and extent of damage of shoot borer, Hypsipyla robusta (Moore) Lepidoptera: Pyralidae was studied in 2-8 years old Chukrasia velutina Wight et Arn. plantations in hilly areas of Chittagong, Bangladesh. A single tree could have attacked several times in the season. About 47% C. velutina trees were found to have attacked at least once in their lifetime. The infestation rate was more pronounced on the hill slopes (56%) than on the valleys (37%). A good number of trees (60%) were found to exhibit recovery trend after the infestation while other trees were with the formation of fork, cork, knot, curve, twist, whorled branching from the point of infestation (Mostly at a height of 2-3 m). It was estimated that about 42% potential biomass production was lost due to the infestation. Apart from that, some trees were found to show an encouraging `resistance` character keeping intact themselves against the infestation that referred an ample scope of propagation and plantation in future for a better inheritance.

ASCI-ID: 1-3136

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