Author(s):

Naveena JB and Sharanabasappa

Abstract: Investigation on different insecticides against sucking pests of cotton like, aphids and whiteflies were carried out during 2016-17 in farmer field Kommanalu village, Shivamogga. The result raveled that, aphids population was recorded least in dinotefuron 20 SG @ 0.3g/ l (8.69 aphids/ 3 leaves), imidacloprid 17.8 SL @ 0.25 ml/ l (6.99 aphids/ 3 leaves) imidacloprid 70 WG @ 0.25g/ l (2.96 aphids / 3 leaves) and dinotefuron 20 SG @ 0.3g/ l (2.21 aphids/ 3 leaves) were most effective treatments in reducing incidence of aphids on Bt cotton as compared to other chemicals. However, the lowest population of whiteflies was recorded least in imidachloprid 17.8 SL @ 0.25 ml/ l (5.71 whiteflies / 3 leaves), thiamethoxam 25 WG @ 0.25g/ l (3.88 whiteflies /3leaves) and imidachloprid 17.8 SL @ 0.25 ml/ l (1.88 whiteflies / 3 leaves). Were effective chemical against cotton whiteflies.

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