[DOWNLOAD] "Impact of Dry Weather on Infestation Rate of Aphids (Homoptera: Aphididae: Adelgidae) on Highland Conifers in Azad Jammu and Kashmir (Report)" by Pakistan Journal of Zoology # eBook PDF Kindle ePub Free

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eBook details

• Title: Impact of Dry Weather on Infestation Rate of Aphids (Homoptera: Aphididae: Adelgidae) on Highland Conifers in Azad Jammu and Kashmir (Report)
• Author : Pakistan Journal of Zoology
• Release Date : January 29, 2012
• Genre: Life Sciences,Books,Science & Nature,
• Pages : * pages
• Size : 203 KB

Description

Byline: Muhammad Rahim Khan, Idris Bin Ghani, Muhammad Rafique Khan, Alia Hayat and Abdul Ghaffar Khan Abstract.- An unusual high infestation of Aphids and Adelgids has been a big challenge for the last 5-10 years in Himalayan highland conifers. The highest attack rate has been observed during the early winter from mid of November and continues until the end of January. The principle aim of the study conducted was to identify the aphid pest species and to find out the factors that contribute in the severe infestation of aphids/adelgids during dry winter and the species variation from six natural forests sites. The interaction between aphids and their host trees were thoroughly studied and there was no apparent indication of genetic variation among the conifer trees. Uniform attack rate was seen on the trees those were under severe water stress. The pine trees from same study site were not attacked at all or less attacked was due to the severity of physiological drought.

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