August 2009
Variation of resistance to endosulfan in tea mosquito bug, Helopeltis theivora waterhouse (heteroptera: miridae) in the tea plantation of the Sub-Himalayan Dooars, northern west Bengal, India
The tea mosquito bug, Helopeltis theivora Waterhouse, from the Dooars tea plantations, North Bengal, India, was tested for susceptibility change and resistance development to endosulfan. Six different H. theivora populations collected from six subdistricts of the Dooars and their responses to endosulfan were investigated by probit analysis and compared with those of a susceptible reference...
August 2009
Population dynamics of the leaf curl aphid, Brachycaudus helichrysi (Kalt.) and its natural enemies on subtropical peach, Prunus persica cv. Flordasun
Population dynamics of leaf curling aphid, Brachycaudus helichrysi (Kalt.) and natural enemies associated with the pest were studied. The initial occurrence of the alate forms of B. helichyrsi on peach was noticed as the first alates (1.33/10 leaves) in the 3rd week of October, 2004. In the aphid colonies, alates appeared (2.33 alates/10 leaves) in the 3rd week of February and...
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