Studies on Efficacy and Economics of Herbicide Mixture in Wet Direct -Seeded Rice (Oryza sativa L.)

Author: Mandala Kalyanbabu, Rajesh Shriram Kalasare, Ashirbachan Mahapatra and Dinkar J. Gaikwad

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Abstract

Rice is one of the most important cereal crops grown all over in India. But day by day the growing population has become a challenge which is decreasing the agricultural land and water supplies. Since direct sowing is a convenient process as it requires less water during cropping. But in direct seeded rice, weeds are a serious issue since they thrive all season long and reduce output by roughly 35% when compared to weed-free conditions. Weed management is always been a crucial task for the farmers. But proper weed management helps in better weed control as well as good absorption and translocation of nutrients by plants with less competition. Herbicide use is currently the most popular method for weed infestation control among all available methods since it is seen as the most dependable, simple, time and money-saving solution. But most of the herbicides used in wet seeded rice are selective and weed specific, and thus control only a small portion of the diverse weed flora. Several new pre-mix herbicide products having broad spectrum activity are now available in the markets which could exclude the labour of tank mixing as well as the possibility of non-compatibility. The current study was conducted in kharif season in rice during 2022 at Post Graduate Research Farm, M.S. Swaminathan School of Agriculture. The experiment was laid out in randomized block design with 8 treatments and 3 replications. The treatments consisted of Triafamone + Ethoxysulfuran (67.5 g a.i. ha-1) at 12-14 DAS (T1), Fenoxaprop-p-ethyle + Ethoxysulfuran (50+15 g a.i. ha-1) at 17-18 DAS (T2), Metsulfuran-methyl + chlorimuron-ethyl Bispyribac-sodium (4+25) g a.i. ha-1 (T3), Bispyribac-Na + Ethoxysulfuran (25+15g a.i.ha-1) at 10-12 DAS (T4), Preticlachlor + Bensulfuran-methyle (660g a.i.ha-1) at 4-5 DAS (T5), Bispyribac-Na (30g a.i. ha-1) at 8-10 DAS (T6), weed free (HW at 20, 40 and 60 DAS) (T7) and Weedy check (T8). The results revealed that the maximum growth, yield and weed parameter was significantly higher with the application of pre – emergent mixed herbicide Triafamone + Ethoxysulfuran (67.5 g a.i.ha-1) at 12 -14 DAS to achieve the higher growth and to decrease the weed density through which it helped in high productivity of rice. Therefore, the application of this treatment might be beneficial to the farmers under southern Odisha condition.

Keywords

Herbicide mixture, Weed free, Weedy check, Yield

Conclusion

On the basis of experimental findings, it can be concluded that application of Triafamone + Ethoxysulfuran (67.5 g a.i. ha-1) at 12-14 DAS and following with manual weeding at recommended timings helps in achieving maximum growth in plant. Besides, it increases the weed control efficiency through which it has achieved the higher yield.

References

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How to cite this article

Mandala Kalyanbabu, Rajesh Shriram Kalasare, Ashirbachan Mahapatra and Dinkar J. Gaikwad (2023). Studies on Efficacy and Economics of Herbicide Mixture in Wet Direct -Seeded Rice (Oryza sativa L.). Biological Forum – An International Journal, 15(10): 1351-1354.