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International Journal of Zoological Research
Year: 2011  |  Volume: 7  |  Issue: 3  |  Page No.: 286 - 292

Diverse Response of Growth Stages of Brassica Varieties to Lipaphis erysimi Kaltenbach (Homoptera: Aphididae)

S.M.H. Jahan and M.A. Rahman    

Abstract: The study was conducted to know the diverse response on growth stages of mustard varieties to mustard aphids. Among ten mustard varieties, the maximum aphid population was recorded on Tori-7 at flowering stage but the population reached to the peak in BS-5 variety. Pod formation stage was more vulnerable for aphid infestation and increased population. Aphid infestation received higher at pod formation stage than flowering stage and consequently produced lower yield. Moreover, experiment indicated that aphid infestation were severe in 2007 as compared to 2006 in respect of percent infestation and number of aphids per plant under study.

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