Effect of Mungbean Bud Necrosis Disease on Growth and Yield Parameters of Mungbean in Protected and Unprotected conditions

Author: Afreen Begum, Aswathanarayana, D.S., Yenjerappa, S.T., Govindappa, M.R. and Sreenivas A.G.

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Abstract

Mungbean [(Vigna radiata (L.) Wilczek] is the important pulse crop after chickpea and pigeonpea in India which is called as “Queen of pulses”, has prone to be infected by bud necrosis disease. In recent years the incidence of disease gradually increasing in mungbean growing areas of Karnataka. Effect of mungbean bud necrosis disease on growth and yield parameters was studied during Kharif 2021 at research plot and MARS, UAS, Raichur, Karnataka. The study reveals that, in first DOS (25th June 2021), highest (64.79%) yield loss was recorded in the plants infected at 25 DAS. Complete yield loss was observed in plants infected at 25 DAS in 2nd DAS (1st July). Similarly same trend was noticed in plants infected at 25, 33, 40 and 47 DAS in 3rd DOS (9th July). Whereas 100 percent yield loss recorded in plants infected at 25 & 33 DOS during 4th DOS (23rd July). While lowest per cent yield loss was recorded in 75 DAS in all four DOS. Mungbean bud necrosis disease was reduced to maximum extent by treating the seeds with imidacloprid 78FS at 10 ml/kg followed by three sprays with fipronil 5SC at 1ml/l and improved growth parameters with maximization of yield by avoiding 100 per cent yield loss.

Keywords

Yield loss, Pod weight, Imidacloprid, Fipronil, Thrips

Conclusion

In all the four dates of sowing, the growth and yield parameters such as plant height, number of branches per plant, number of nodules per plant, number of pods per plant, pod weight and yield per plant were maximum in healthy plants, followed by in plants where disease started at 75, 68, 61, 54, 47, 40 and 33 DAS, these parameters were minimum in plants where disease appeared at 25 DAS. As age of the plants increases, disease incidence also increases and at 75 DAS highest disease was noticed, since early infected plants can serves as source of inoculums in the plot and helps for subsequent spread by thrips vectors. The yield loss was gradually decreased as the crop stage of infection increased from first appearance of symptoms at 25 DAS (64.79, 100, 100 & 100 %) to 75 DAS (8.45, 56.52, 75.00 & 37.04 %) respectively in all four dates of sowing. Hence, yield loss was more when the mungbean infected at early stage compare to infection at adult plant stage. Mungbean bud necrosis disease was reduced to maximum extent by treating the seeds with imidacloprid 78FS at 10 ml/kg followed by three sprays with fipronil 5SC at 1 ml/l and improved growth parameters with maximization of yield by avoiding 100 per cent yield loss. This treatment is significantly superior to other treatments.

References

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How to cite this article

Afreen Begum, Aswathanarayana, D.S., Yenjerappa, S.T., Govindappa, M.R. and Sreenivas A.G. (2022). Effect of Mungbean Bud Necrosis Disease on Growth and Yield Parameters of Mungbean in Protected and Unprotected conditions. Biological Forum – An International Journal, 14(4): 742-751.