Efficacy of Different Insecticides against Rice Earhead Bug, Leptocorisa acuta (Thunberg) (Hemiptera : Alydidae)

Author: Rakshith K.P., Jalgaonkar V.N., Mule R.S., Rajemahadik V.A., Kumud V. Naik, Venkata Srinivasa Chari M., Aboli R.P., Dalvi N.S. and Revanth Reddy S.R.K.

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Abstract

The field experiment for the study of “Efficacy of different insecticides against rice earhead bug, Leptocorisa acuta (Thunberg) (Hemiptera : Alydidae)” was carried out at Department of Agronomy, College of Agriculture, Dapoli, Dist. Ratnagiri, during Kharif 2022-23. The efficacy Buprofezin, Deltamethrin, Dinetofuran, Flonicamid, Imidacloprid, Spriromesifen, Sulphoxaflor was evaluated. Flonicamid was found superior and most effective in controlling rice earhead bug. This was followed by Spiromesifen, Buprofezin, Dinetofuran, Deltamethrin, Imidacloprid and Sulphoxaflor. All the treatments were significantly better over control.

Keywords

Rice, Rice earhead bug, Leptocorisa acuta, Efficacy, insecticides.

Conclusion

The data on cumulative mean rice earhead bug population after spraying indicated that all the treatments were recorded significantly less earhead bug population as compared to untreated control. The mean earhead bug population ranged from 0.65 to 1.63 per hill. The studies on the bio-efficacy of various insecticides against rice earhead bug indicated that T4 (Flonicamid 50% WG @ 0.3g) was found to be most effective treatment against rice earhead bug with an incidence of 0.65 earhead bugs/hill at 10 days after spraying. This was followed by T6 (Spiromesifen 22.9% SC @ 0.8ml) which recorded 0.77 earhead bugs/hill. The next best treatments were T1 and T3 (Buprofezin 25% SC @ 2ml and Dinetofuran 20% SG @ 0.3g) were at par with each other which recorded 0.91 and 1.00 eahead bugs/hill, respectively. The next best treatments in descending order were T2, T5 and T7 (Deltamethrin 11% EC @ 0.3ml, Imidacloprid 17.8% SL @ 0.2ml and Sulphoxaflor 24% SC @ 0.8ml) and were at par with each other scoring 1.02, 1.05 and 1.15 earhead bugs/hill, respectively. The maximum infestation 1.63 earhead bugs/hill was noticed in untreated control. The efficacy Buprofezin, Deltamethrin, Dinetofuran, Flonicamid, Imidacloprid, Spriromesifen, Sulphoxaflor was evaluated against rice earhead bug. The least mean population of rice earhead bug 0.65 /hill was observed in the plot treated with Flonicamid. The treatment Flonicamid 50 WG was found superior and most effective in controlling infestation of rice earhead bug

References

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How to cite this article

Rakshith K.P., Jalgaonkar V.N., Mule R.S.¬¬¬, Rajemahadik V.A., Kumud V. Naik, Venkata Srinivasa Chari M., Aboli R.P., Dalvi. N.S. and Revanth Reddy S.R.K. (2024). Efficacy of different insecticides against rice earhead bug, Leptocorisa acuta (Thunberg) (Hemiptera : Alydidae). Biological Forum – An International Journal, 16(1): 07-10.