R. K. KALYAN, S. RAMESH BABU, D. P. SAINI, URMILA AND G. S. AMETA

A field experiment was conducted at Agricultural Research Station– Banswara (Rajasthan) during kharif–2009 and
2010 to determine the relative efficacy of different doses of tolfenpyrad 15 EC against jassids and whiteflies on cotton along with other new molecules. Eight treatments viz. tolfenpyrad 15 EC @ 100 a.i./ha, tolfenpyrad 15 EC @125 a.i./ha, tolfenpyrad 15 EC @150 a.i./ha, tolfenpyrad 15 EC @ 300 a.i./ha (only for phytotoxicity), imidacloprid 17.8 SL @ 22.5 a.i./ha, acetamiprid 20 SP @ 20 a.i./ha, thiamethoxam 25 WG @ 25 a.i./ha and untreated control were evaluated. Tolfenpyrad 15 EC at doses of 100, 125 and 150 a.i./ha were effective in controlling the population of jassids and whiteflies on cotton. Among the doses tested, tolfenpyrad 15 EC @ 150 and 125 a.i./ha were superior to acetamiprid 20 SP, imidacloprid 17. 8 SL and thiamethoxam 25 WG in controlling population of the pests and gave significantly higher yield; besides, tolfenpyrad 15 EC @ 300 a.i./ha did not produce any phytotoxicity symptoms on the treated crop.