EFFECT OF NEW INSECTICIDES AGAINST COTTON BOLLWORMS

D.THANGARAJU; S.UTHAMASAMY; A.V.RANGARAJAN and S.JAYARAJ

doi:https://doi.org/10.29321/MAJ.10.A01682

Madras Agricultural Journal

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EFFECT OF NEW INSECTICIDES AGAINST COTTON BOLLWORMS

Author: D.THANGARAJU, S.UTHAMASAMY, A.V.RANGARAJAN and S.JAYARAJ,

p-ISSN: 0024-9602, e-ISSN:2582-5321, Vol: 80, Issue: aug-aug,

DOI:https://doi.org/10.29321/MAJ.10.A01682

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Abstract

In field trials conducted for two years, it was found that two new synthetic pyrethroids viz., cyhalothrin at the rate of 0.025 kg a.i./ha and fluvalinate 0.075 kg a.i./ha were equally effective as fenvalerate 0.075 kg ai./ha against the bollworms on cotton. There was not much difference among the treatments in the yield of seed cotton, though flucythrinate recorded 2033 kg/ha (1985-86) and fenvalerate 1780 kg/ha (1986-87) as against 978 kg/ha in the untreated check respectively.

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