Informatics Publishing Limited

T. Surulivelu ¹, T. Kumaraswami ¹

Affiliations
1 Central Institute for Cotton Research (Regional Station), Coimbatore 641 003, IN

Abstract

A selective method of application of insecticide viz, 'Skip row coverage' has been employed against sucking pests in cotton. Skip row coverage with monocrotrophos (as alternate row or as alternate pair row) was as effective as full coverage against the leafhopper, Amrasca biguttula biguttula Ishida and the aphid, Aphis gossypii Glov. Deltamethrin, endosulfan and monocrotophos as skip row spray coverage harboured more population of the predator, Chrysoperla carnea (Steph), while monocrotophos, carbaryl and deltamethrin spared the predator, Menochilus sexmaculata (Fab.) by 2 .0 to 2.4, 1.6 to 2.2 and 1.2 to 2.8 times more than full coverage with the respective insecticides.

Keywords

Skip Row Coverage, Insecticides, Cotton, Amrasca biguttula biguttula, Aphis gossypii, Menochilus sexmaculata, Chrysoperla carnea.

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T. Surulivelu ¹, T. Kumaraswami ²

Affiliations
1 Central Institute for Cotton Research Regional Station, Coimbatore-641 003, IN
2 Tamil Nadu Agricultural University, Coimbatore-641003, IN

Abstract

Foliar application of dlmethoate was relatively safe to the predator, Menochilus sexmaculata Fab, and was effective against the leaf hopper Amrasca biguttula biguttula Ishida from 28 to 52 days after sowing. Seed treatment with Carbofuran 40F was the next best and gave protection from the leaf hoppers from germination to 42 days after sowing and was also safe to the predator. Although soil application with aldicarb or carbofuran reduced the abundance of the predator, it was the most effective treatment for the aphid, Aphis gossypii Glov.

Keywords

Cotton, Pesticides, Soil Application, Seed Treatment, Foliar Application, Coccinellid, Jassid, Aphid.

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