Effect of early post-emergence herbicide for control of weeds in winter irrigated upland cotton (Gossypium hirsuttlm)
DOI:
https://doi.org/10.59797/ija.v51i4.5040Keywords:
Winter cotton, Early post-emergence, Trifloxysulfuron, Weed density, Weed dry weight, Weed- control efficiencyAbstract
A study was carried out to evaluate the effect of trifloxysulfuron with and without adjuvant against weeds in upland cotton (Gossypium hirsutum L.) during the winter seasons of 2003-04 and 2004-05 at the Tamil Nadu Agricultural University, Coimbatore. Weeds,viz. Tranthema portulacastrum L., Chloris inflata Link; syn. C. barbata Sw. and Cyperus rotundus L., were the dominant weeds of the experimental fieid. Trifloxysulfuron effectively con- trolled T: portulacastrum and C. rotundus. Trifloxysulfuron Q 10 and 20 glha with and without adjuvant provided 85 to 91% weed-control efficiency compared to unweeded control. Among the treatments, the maximum cotton yield of 16.89 and 17.96 qlha was observed in trifloxysulfuron 10 glha + adjuvant during the winter season of 2003-04 and 2004-05 respectively. Minimum seed-cotton yield of 8.97 and 8.76 qlha was obtained in unweeded control in first and second year.References
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