Field experiments were conducted during kharif 2012 and 2013 at Agricultural Research Station, Ragolu,Srikakulam district, Andhra Pradesh to assess the efficacy and compatibility of five insecticides and twofungicides at recommended concentrations. The evaluation was done as a tank mix in various insecticideand fungicide combinations for their efficacy against sheath blight, stem borer, leaf folder and brown planthopper, for the purpose of reducing the application cost in the event of simultaneous occurrence of both pestand disease during any stage of crop growth period. Among different combinations tested during kharif2012, Flubendamide @0.25mL/L in combination with Trifloxystrobin 25% + Tebuconazole 50% (Nativo 75%)0.4g/L recorded less sheath blight incidence (27.33%) and less pest incidence i.e., leaf folder (2.0% leafdamage) followed by Chlorpyriphos @2.5mL/L + Propiconazole @2.0mL/L (30.13%, 7.92%) andChlorantriniliprole @0.3mL/L + Propiconazole @1.0mL/L (32.42%, 8.13%) and Flubendamide @ 0.25mL/L+ Propiconazole @1.0mL/L (35.17%, 1.59%) compared to other combinations and untreated control. Duringkharif 2013 also, Flubendamide @0.25mL/L in combination with Trifloxystrobin 25% + Tebuconazole 50%(Nativo 75%) 0.4g/L recorded less sheath blight incidence (29.01%) with significant reduction of brownplant hopper (2.0/hill) and stem borer as white ears (2.8%) followed by Chlorantriniliprole @0.3mL/L +Trifloxystrobin 25% + Tebuconazole 50% (Nativo 75%) 0.4g/L with 29.36% sheath blight and 4.19% deadhearts and 2.4% white ears. Chlorpyriphos @2.5mL/L + Trifloxystrobin 25% + Tebuconazole 50% (Nativo75%) 0.4g/L followed by Profenophos @2mL/L + Propiconazole @1mL/L were the safest combinations fornatural enemies in rice ecosystem. All the combinations recorded significantly higher yields compared tountreated control.
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