Journal ID : AMA-17-10-2021-10803
[This article belongs to Volume - 52, Issue - 02]
Total View : 377

Title : Bioefficacy and phytotoxicity of herbicides in urdbean and their residual effect on succeeding transplanted basmati rice

Abstract :

A field experiment was conducted to evaluate the bioefficacy and phytotoxicity of herbicides in urdbean and their residual effect on succeeding transplanted basmati rice. The experiment was laid out in randomized block design with three replications. The major weed flora in summer urdbean were Cyperus spp., Cynodon dactylon, Digitaria sanguinalis, Solanum nigrum, Physalis minima and Phyllanthus niruri. In herbicidal treatments, Imazethapyr + pendimethalin (RM) @1000 g/ha as pre-emergence significantly reduced total weed density and total weed dry weight which was statistically at par with Imazethapyr + imazamox (RM) @ 80 g/ha at 3-4 leaf stage, Imazethapyr @ 80 g/ha at 3-4 leaf stage, Imazethapyr + imazamox (RM) @ 70 g/ha at 3-4 leaf stage and Imazethapyr @ 70 g/ha at 3-4 leaf stage. There was no visual phytotoxic on the urdbean crop. The seedling and plant did not show any abnormality during the crop growth period. Among the herbicidal weed management treatments, significantly highest number of pods/plant and seed yield were recorded with the treatment Imazethapyr + pendimethalin (RM) @1000 g/ha as pre-emergence which was statistically at par with Imazethapyr + imazamox (RM) @ 80 g/ha at 3-4 leaf stage, Imazethapyr @ 80 g/ha at 3-4 leaf stage, Imazethapyr + imazamox (RM) @ 70 g/ha at 3-4 leaf stage and Imazethapyr @ 70 g/ha at 3-4 leaf stage and remain superior over weedy check. There was no toxicity in terms of chlorosis and stunting were observed on succeeding transplanted rice crop at different intervals due to different weed management practices applied on summer urdbean crop. Different weed management treatments applied in urdbean were failed to show any significant effect on plant height and grain yield of succeeding transplanted basmati rice crop during the both years of cropping.

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