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Weed Dynamics of Semi-Dry Rice (Oryza sativa) under different Nutrient and Weed Management Practices in Central Telangana Zone

Author: K. Naganjali, K.P. Vani, M. Madhavi, S. Narender Reddy and M.M. Kadasiddappa

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Abstract

A field study was carried out in the Kharif seasons of 2016 and 2017 in Aswaraopet, Telangana State, to assess the appropriate methods for management of nutrients and controlling weeds among different weed management practices under semi-dry system of rice cultivation. The experiment was designed in a split-plot format, implementing various approaches for nutrient and weed management on sandy clay loam soil. It was found that the combination of 75% of the recommended dose of fertilizer (RDF) and 25% of nitrogen from vermicompost resulted in the lowest weed density and weed dry matter production, while simultaneously achieving the highest rice grain yield. In addition, the application of Bispyribac sodium 10 SC (25 g ha-1) as a pre-emergence treatment, followed by Pyrazosulfuron-ethyl 10 WP (25 g ha-1) and 2,4-D 80 WP (0.5 kg ha-1), in combination with hand weeding at 50 days after sowing (DAS), significantly reduced weed density and dry weight, ultimately leading to a higher yield of rice. Nevertheless, the most effective weed control efficiency was observed with the application of Bispyribac sodium 10 SC (25 g ha-1) as pre-emergence treatment, followed by Pyrazosulfuron-ethyl 10 WP (25 g ha-1) and 2,4-D 80 WP (0.5 kg ha-1), along with hand weeding at 50 DAS.

Keywords

Herbicides, Nutrients, Semi-dry rice, Weed, Yield

Conclusion

It can be recommended that higher grain yield was observed with 75% RDF + 25% N through vermicompost and Bispyribac sodium 10 SC 25 g ha-1 fb (Pyrazosulfuron ethyl 10 WP 25 g ha-1 + 2, 4-D 80 WP 0.5 kg a.i ha-1) + HW at 50 DAS recorded lower weed density, weed dry matter and depletion of nutrient by weeds (N, P and K) under semi dry rice cultivation in the Central Telangana Zone.

References

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How to cite this article

K. Naganjali, K.P. Vani, M. Madhavi, S. Narender Reddy and M.M. Kadasiddappa (2023). Weed Dynamics of Semi Dry Rice (Oryza sativa) under different Nutrient and Weed Management Practices in Central Telangana Zone. Biological Forum – An International Journal, 15(10): 1136-1141.