Efficacy of pesticides against rice plant hoppers, and insecticide and fungicide compatibility

Insecticides viz., spinetoram (6%)+ methoxyfenozide (30%) 36EC @ 0.75 ml/l, triflumezopyrim 106SC @0.48 ml/l; fungicide, hexaconazole 5SC @ 2.0 ml/l, tricyclazole 75WP @ 0.6 ml/l, and their combinations viz., spinetoram (6%) + methoxyfenozide (30%) + hexaconazole @ 0.75+2.0 ml/l, spinetoram (6%) + methoxyfenozide (30%) + tricyclazole @ 0.75+0.6 ml/l, triflumezopyrim+hexaconazole @ 0.48+2.0g/l and triflumezopyrim+ tricyclazole @ 0.48+0.6 g/l along with an untreated check were evaluated against rice BPH on Pusa Basmati 1121 during kharif 2017 and Pusa Basmati 1637 during 2018. Brown planthopper (BPH) Nilaparvata lugens (Stal.) appeared in outbreak numbers in the experiments at 90 days after transplanting (DAT), while incidence of other insect pests and diseases viz., stem borer, leaf folder, sheath blight and blast remained very low. Amongst pesticides, triflumezopyrim+ tricyclazole (2017) and triflumezopyrim (2018) were observed to be the most effective treatment against BPH followed by triflumezopyrim+ hexaconazole. The efficacy of the combination products against BPH depicted that the fungicides did not affect the effectiveness of the insecticide. The fungicides, tricyclozole and hexaconazole were thus compatible with triflumezopyrim.