Vol. 7, Issue 3 (2019)
Evaluation of post emergence herbicide bentazon in potato crop
Author(s): SP Singh, S Rawal, VK Dua, S Roy and SK Sharma
Abstract: The field study was carried out during crop season of 2013-14 and 2014-15 to evaluate the weed control efficacy of herbicide bentazon in comparison to weed free and weedy check treatments in west central region of the country. Prominent weeds were Chenopodium murale, Chenopodium album, Celosia argentia and monocot grasses like Echinochloa crusgallis. No phyto- toxic symptoms were observed on potato plants after bentazon application. Growth parameters, yield attributes and yields were not influenced by its spray. Weed control index & efficiency, and herbicide efficiency index improved significantly with post- emergence application of bentazon. Bentazon (1.0 l ha-1) attained plant height (47.5 cm), compound leaf (69.0) and shoot no. (4.3) comparable to weed free plots. Total tuber number (491000 ha-1) and yield (32.2 t ha-1) was also statistically similar at this dose as compared to weed free treatment. Weed density (34.3 m2), weed dry weight (13.9 g m2) and weed control index (91) was also comparable to weed free treatment. Likewise herbicide efficiency index (3) was also comparable to weed free (7) and bentazon @ 1.5 l ha-1 (5). Application of Bentazon @ 1.0 l ha-1 effectively reduced weed count, weed fresh weight as well as weeds dry weight. Reduction in weed count was 78%, weed fresh weight 92% and weed dry weight 91% compared to weedy check. Increase in tuber yield under this treatment was to the tune of 26.5% over weedy check.NPK uptake of bentazon (1.0 l ha-1) vis a vis weed free and bentazon @ 1.5 l ha-1 was statistically at par. Overall performance of this post emergence herbicide suggested that bentazon @ 1.0 l ha-1 was very effective for control of weeds in potato crop when applied at 3-4 leaf stage.
Pages: 2816-2820 | 765 Views 318 Downloads
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How to cite this article:
SP Singh, S Rawal, VK Dua, S Roy, SK Sharma. Evaluation of post emergence herbicide bentazon in potato crop. Int J Chem Stud 2019;7(3):2816-2820.
