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Pakistan Journal of Biological Sciences

Year: 2003  |  Volume: 6  |  Issue: 24  |  Page No.: 2050 - 2053

Seasonal Aboundance and Control of Spiraling Whitefly, Aleurodicus dispersus Russel on guava

M.M. Rashid, M. Mofazzel Hossain, M.Z. Alam, M. Ibrahim and M.K.A. Bhuiyan

Abstract

Experiments on seasonal abundance of spiraling whitefly, Aleurodicus dispersus on guava and its control were conducted. The seasonal distribution of spiraling whitefly indicated that winter months December, January and February were major peak period of infestation. Adult whitefly started to infest the guava plants in September and increased to maximum in January. Whitefly infestation decreased to zero from April and continued to August. The change in the level of infestation was due to difference in environmental temperature and rainfall. Field trials were conducted to test the efficacy of some common insecticides against the whitefly. Although all the chemicals reduced the population of different stages of whitefly, the overall effect was found to be better with systemic insecticides. Dimethoate was found most effective in controlling spiralling whitefly of guava followed by spray treatment with, phosphamidon, cypermethrin, malathinon. Diclorvos was comparatively less effective insecticide. Study on biological control of whitefly showed that a coccinelid predator Axinocymnus puttarudriahi Kapur and Manshi (Coleoptera: Coccinellidae) was effective in controling the whitefly without associated ant.

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