Control of Rice Stem Borer, Leaf Roller and Gali Midge through Water-Surface Application of Granular Insecticides

S. JAYARAJI; N. CHANDRAMOHAN and R. SANKARANARAYANAN

doi:https://doi.org/10.29321/MAJ.10.A03302

Madras Agricultural Journal

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Control of Rice Stem Borer, Leaf Roller and Gali Midge through Water-Surface Application of Granular Insecticides

Author: S. JAYARAJI, N. CHANDRAMOHAN and R. SANKARANARAYANAN,

p-ISSN: 0024-9602, e-ISSN:2582-5321, Vol: 63, Issue: may-jul,

DOI:https://doi.org/10.29321/MAJ.10.A03302

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Abstract

Four granular insecticides, viz. carbofuran, phorate, fenitrothion and ondrin each at three doses of 0.5, 1.5 and 2.5 kg a.../ha were applied on water-surface on 20th and 50th days after planting for controlling the major pests of rice. Carbofuran and phorate were effective in controlling stem borer and gall fly in higher doses, and carbofuran in all the doses controlled the leaf roller better than the other chemicals. Significant increase in grain yield to the extent of 50.2 and 37.9 per cent was also noted due to carbofuran at 2,5 and 1.5 kg a.. doses of application followed by phorate at 1.5 kg a.i./ha application.

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