Effect of Pre Plant Incorporation of Herbicidal Mixture on Weed Dynamics in Soybean under Black Soil of Jabalpur Region

Author: Shani Gulaiya, K.K. Jain, Abhinav Rathi, Priya Kochale, Pinki Mehra, Rajkumar Prajapati and Abhishek Sharma

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Abstract

A field experiment was conducted at Breeder Seed Production Farm, Department of Agronomy, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur (M.P.) during Kharif season 2019. The weed associated with crop in experimental field were classified as monocot weeds like Echinochloa colona, Cyperus iria and dicot weeds like Mollugo pentaphylla, Phyllanthus urinaria, Alternenthera philoxeroides. These five species were most dominant, contributing about 100 percent of the total weed flora of monocot and dicot weeds. In weedy check plots the dicot weeds were predominance among the dicot weeds Mollugo pentaphylla was the most dominant weed with maximum relative density (23.14%) followed by Alternenthera philoxeroides (14.89%), whereas monocot weeds contributed (49.99%) to relative density of weeds, However, among the monocot weeds Echinochloa colona marked its presence in more value (26.16%) as compared to Cyperus iria (23.83%). The dry weight of weeds reduction was more pronounced when Diclosulam 0.9% + Pendimethalin 35% SE ready mixture was applied at higher rate i.e. from 20.25 + 787.5 to 45 + 1750 g ha-1. The density and dry weight of weeds were reduced under hand weeding to the maximum extent over herbicidal treatments. The highest weed control efficiency (81.00%) was recorded under application of Diclosulam 0.9% + Pendimethalin 35% SE 45 + 1750 g ha-1 followed by application of Diclosulam 0.9% + Pendimethalin 35% SE at 22.5 + 875 g ha-1 (77.69%). However, the maximum weed control efficiency (95.69%) were observed under hand weeding at 20 and 40 DAS in soybean over herbicidal treatments.

Keywords

Weed flora, soybean, relative density, Echinochloa colona, dicot and monocot weeds, hand weeding, weed control efficiency

Conclusion

Based on the foregoing discussion it can be concluded that the dominant weed flora in the experiment field Echinochloa colona and Mollugo pentaphylla was predominant weed flora in experimental field during experiment. However, other monocots like Cyperus iria and dicots like Alternenthera philoxeroides and Phyllanthus urinaria were also found. Density and dry weight of weeds reduction was more pronounced when Diclosulam 0.9% + Pendimethalin 35% SE ready mixture was applied at higher rate i.e. from 20.25 + 787.5 to 45 + 1750 g ha-1 among all the herbicidal treatments. Thus, farmers can adopt the pre plant ncorporation application of Diclosulam 0.9% + Pendimethalin 35% SE ready mixture as a wise alternative for weed management in soybean crop.

References

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How to cite this article

Shani Gulaiya, K.K. Jain, Abhinav Rathi, Priya Kochale, Pinki Mehra, Rajkumar Prajapati and Abhishek Sharma (2023). Effect of Pre Plant Incorporation of Herbicidal Mixture on Weed Dynamics in Soybean under Black Soil of Jabalpur Region. Biological Forum – An International Journal, 15(9): 1024-1029.