The studies were undertaken to gather information on the beneficial and adverse effects of repeated application of insecticides on bengalgram and cowpea independent of their insecticidal action. Three rounds of 0.1% sprays of BHC, DDT, Lindane, Aldrin, Dieldrin, Basudin and H. E. T. P. and 0.05% sprays of Parathion (Folidol) and Endrin were applied under pot culture conditions during 1961-62 at Coimbatore and replicated four times. The first round of treatments was given a month after sowing and the subsequent two rounds at intervals of 15 days.
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Tamil Nadu Agricultural University
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Tamil Nadu, India.
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