Evaluation of efficacy of Newer Molecules against spiraling Whitefly Aleurodicus dispersus (Russel) in Guava, Psidium guajava L.

Author: Suvarna Patil, Arunkumar B., Raghunatha R., Maheshwarappa H.P., Aswathanarayana Reddy, R.B. Hirekurubar and Mastiholli A.B.

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Abstract

The Spiralling whitefly, Aleurodicus dispersus Russell, is a polyphagous pest native to the Caribbean region and Central America has turned out to be cosmopolitan in distribution as well creating devastation to the farming community. The field experiment was conducted on different biorational and insecticides against spiralling whitefly (Aleurodicus disperses Russel) in guava at Regional Horticultural Research and Extension Centre, Dharwad, Karnataka during 2018-19 and 2019-20. All the treatments were significantly superior over untreated check. The results indicated that the less population of spiralling whitefly was reported in Thiamethoxam 25 WG @ 0.2g/L treated plot (3.82 spiralling whiteflies/three leaves) followed by Acetamiprid 20 SP @ 0.2g/L. Overall, chemical control by Thiamethoxam 25 WG was the most effective against whiteflies populations in Guavain both seasons.

Keywords

Guava, Whiteflies, Pest management, New molecules, Botanicals.

Conclusion

The present study revealed the effectiveness of various biorational insecticides against spiralling white fly. Thiamethoxam 25 WG @ 0.2 g/L proved to be the highly effective treatment among all the treatments tested for the control of spiralling white fly with highest yield per hectare and Benefit:Cost ratio followed by Acetamiprid 20 SP @ 0.2 g/L and Difenthiuron 50 WP @ 0.5 g/L.

References

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How to cite this article

Suvarna Patil, Arunkumar B., Raghunatha R., Maheshwarappa H.P., Aswathanarayana Reddy, R.B. Hirekurubar and Mastiholli A.B. (2023). Evaluation of efficacy of Newer Molecules against spiraling Whitefly Aleurodicus dispersus (Russel) in Guava, Psidium guajava L.. Biological Forum – An International Journal, 15(9): 311-314.