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Five commonly used insecticides (contact and systemic), two fungicides and one micronutrient in twenty nine combinations were tested for its physical, chemical compatibility, phytotoxicity and bio efficacy on sunflower crop at Regional Agricultural Research Station, Nandyal during rabi, 2013-14. All the agro chemicals tested were physically and chemically compatible. Among the 29 combinations, phytotoxicity symptoms were observed in imidacloprid 17.8 % SL + triazophos 40%EC ; imidacloprid 17.8 % SL + monocrotophos 36%SL ; imidacloprid 17.8 % SL + flubendiamide 480 SC; triazophos 40%EC + (carbandazim + mancozeb); and triazophos + wettable sulphur with a scale of 6,7,1,1 and 1, respectively. The bio efficacy studies revealed that among all the treatments, triazophos 40% EC+ monocrotophos 36 % SL (90.8%) , monocrotophos 36 %SL + flubendiamide 480 SC (58.9%) and rynaxypyr 20 SC + wettable sulphur (62.0%) have registered highest per cent reduction of jassids, whiteflies and leaf damage due to lepidopteran pest complex, respectively over control. Further, the combination of triazophos 40 EC + rynaxypyr 20 SC was effective against jassids and lepidopteran pests and also recorded higher yield (1931 kg/ha).
Keywords: Sunflower, Carbandazim, Mancozeb, Triazophos, Lepidopteran.