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Pakistan Journal of Biological Sciences
Year: 2003  |  Volume: 6  |  Issue: 1  |  Page No.: 57 - 60

Extent of Leaf Damage in Guava Twigs of Different Strata and Different Leaf Position of Twig by Spiraling Whitefly, Aleurodicus dispersus of Twig by Spiraling Whitefly, Aleurodicus dispersus

M.M. Rashid, M.Z. Alam, M. Mofazzel Hossain, M. Ibrahim and M.H. Kabir    

Abstract: The present study was carried out to investigate indirect damage of guava leaf in the form of wax and honeydew covering by the spiraling whitefly (Aleurodicus dispersus) was investigated in a guava orchard, Mymensingh, Bangladesh. Extent of leaf damage in twigs of different strata indicated that the upper most twigs had minimum wax and honeydew-covered leaves than the other twigs of guava plants. The results of the study on variation of leaf damage in different leaf position of twig showed that at early attacking stage the mean percentage of wax and honeydew covered leaves, was significantly higher in upper leaf position than in the middle and the lower leaf position and had the lowest level of whitefly infestation in the lower leaf position of the guava twigs. Results showed that with the build up of population in the month of December and January, wax and honeydew covered leaves were more in middle leaf position. The lower wax and honeydew covering in upper position were recorded in the later months due to rain and rapid growth of new flush, which remained non-infested.

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