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Department of Entomology, S.V. Agricultural College, ANGRAU, Tirupati-517 502.
An experiment on physical, biological and phytotoxic compatibility of different combinations of two insecticides (chlorantraniliprole @ 0.5 ml L-1 and spinetoram @ 0.5 ml L-1), fungicides (propiconazole @ 1 ml L-1 and azoxystrobin + difenoconazole @ 1 ml L-1) and Bacillus thuringiensis @ 10 ml L-1 were conducted in laboratory, at S. V. Agricultural College, Tirupati, Andhra Pradesh in 2023. All the combinations tested were found to be physically compatible with pH levels ranged from 6.1 to 7.3. The in vitro bio efficacy studies revealed that all the combinations of spinetoram with azoxystrobin + difenoconazole and propiconazole were much effective with cent per cent of larval mortality, than spinetoram alone at 72 HAT. Only one combination, chlorantraniliprole + propiconazole was found to be less effective than the individual insecticide. No phytotoxic symptoms were observed with any of the combinations.
KEYWORDS: Bio efficacy, Maize, Physical compatibility, Phytotoxicity, Spodoptera frugiperda