Evaluation of certain Newer insecticides in Management of Whitefly (Bemisia tabaci): A Vector of Yellow Mosaic Disease (YMD) in Blackgram (Vigna mungo L.)

Author: C. Raghu Prasad, K.V. Hari Prasad, G.S. Panduranga and L. Geethanjali

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Abstract

A field experiment was conducted at dryland farm, S.V. Agricultural College, Tirupati during rabi 2020-21 to evaluate the efficacy of nine insecticides i.e. Thiocloprid 21.7 SC @ 1.0 ml l-1, Thiomethoxam 25 WG @ 0.2g l-1, Spiromesifen 240 SC @ 1.0 ml l-1 Acetamiprid 20 SP @ 0.25g l-1 Buprofezin 25 SC @ 1.5ml l-1, Pymetrozine 50 WG @ 0.6 g l-1, Spinoteram 11.7 SC @ 1.0 ml l-1, Diafenthiuron 50 WP @ 1.25 g l-1 and Flonicamid 50 WG @ 0.30 g l-1 against whitefly. The results revealed that diafenthiuron 50 WP @ 1.25 g l-1 was found to be most effective in reducing the whitefly population (75.23%) and YMD incidence (13.51%) followed by spiromesifen 240 SC @ 1.0 ml l-1 (65.19% and 17.17%) and Thiomethoxam 25 WG @ 0.2g l-1 (54.64% and 21.27%) while thiocloprid 21.7 SC @ 1.0 ml l-1 (20.21% and 48.88%) and spinoteram 11.7 SC @ 1.0 ml l-1 (25.16% and 43.91%) showed least efficacy in reducing whitefly population and YMD incidence

Keywords

Bemisia tabaci, MYMV, Management, newer insecticides, vigna mungo

Conclusion

The study recommends two applications of diafenthiuron 50 WP or thiomethoxam 25 WG: the first at 20-30 DAS (vegetative stage) and the second at 35-45 DAS (flowering stage) for effective management for YMD and to improve yields

References

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How to cite this article

C. Raghu Prasad, K.V. Hari Prasad, G.S. Panduranga and L. Geethanjali (2024). Evaluation of certain Newer insecticides in Management of Whitefly (Bemisia tabaci): A Vector of Yellow Mosaic Disease (YMD) in Blackgram (Vigna mungo L.). Biological Forum – An International Journal, 16(7): 83-87.