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Assessing the Effectiveness of Newer Insecticides against Rice Leaf Folder, Cnaphalocrocis medinalis (Crambidae: Lepidoptera)

Author: Anil Kumar S.T., Kiran Kumar G.N., K. Chandrakumara, Moulya M.R., K. Srinivas and R.S. Meena

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Abstract

Leaf folder is one of the major pests of rice which is presently controlled by many insecticides. The present investigation was aimed to study the efficacy of newer insecticides against rice leaf folder. The lowest leaf damage was observed in Emamectin benzoate 5 SG which recorded 1.3% damage, followed by Acephate 50% + Imidacloprid 1.8% SP, Flubendiamide 480SC, thiacloprid 240SC, Spinosad 45SC, Acephate 75SP, Chlorpyriphos 50% + Cypermethrin 5% EC and Fipronil 5SC. After second spray, Emamectin benzoate 5 SG recorded lowest leaf damage (3.85%), which was in line with the Acephate 50% + Imidacloprid 1.8% SP, Acephate75SP, Spinosad 45 SC, Flubendiamide 480SC, Thiacloprid 240SC, Chlorpyriphos 50% + Cypermethrin 5%EC and Fipronil 5SC. While untreated check recorded highest damage as there was no intervention with the insecticide spray.

Keywords

Leaf folder, efficacy, spray, leaf damage, Novel insecticides

Conclusion

The present investigation revealed that all the tested newer insecticides were effective against rice leaf folder management. Among those Emamectin benzoate 5 SG recorded lowest leaf damage (1.25%), which was on par with Acephate 50% + Imidacloprid 1.8% SP, Flubendiamide 480 SC, Thiacloprid 240 SC, Spinosad 45SC, Acephate 75 SP, Chlorpyriphos 50% + Cypermethrin 5% EC, Fipronil 5SC. In fact, the adverse effects of insecticides on biodiversity limit their usage. Hence, there are several botanical insecticides which yield better results and not have adverse effect on the biodiversity.

References

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How to cite this article

Anil Kumar S.T., Kiran Kumar G.N., K. Chandrakumara, Moulya M.R., K. Srinivas and R.S. Meena (2022). Assessing the Effectiveness of Newer Insecticides against Rice Leaf Folder, Cnaphalocrocis medinalis (Crambidae: Lepidoptera). Biological Forum – An International Journal, 14(4): 552-555.