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Bioefficacy, Phytotoxicity and Economics of Post-emergence Herbicides in Moth Bean (Vigna aconitifolia) in Hot Arid Regions

DOI: 10.18805/LR-4776    | Article Id: LR-4776 | Page : 1488-1492
Citation :- Bioefficacy, Phytotoxicity and Economics of Post-emergence Herbicides in Moth Bean (Vigna aconitifolia) in Hot Arid Regions.Legume Research.2021.(44):1488-1492
N.K. Jat, D.V. Singh nandagro09@gmail.com
Address : ICAR-Central Arid Zone Research Institute, Jodhpur-342 003, Rajasthan, India.
Submitted Date : 27-08-2021
Accepted Date : 26-10-2021

Abstract

Background: Weed infestation is the major cause of yield loss to Kharif pulses in arid regions. Post-emergence herbicide application is a promising weed management option for pulses in these areas. Therefore, the current study was aimed to find an effective and economic post-emergence herbicide molecule for weed control in moth bean.
Methods: A field experiment was conducted during 2017-2019 with different herbicides, hand weeding, weed-free and unweededs in Kharif mung bean in a randomized complete block design with three replications. 
Result: Among the herbicide treatments, post-emergence application of propaquizafop + imazethapyr @ 125 g a.i. ha-1 being statistically at par with clodinafop-propargyl + sodium acifluorfen @ 312.5 g a.i. ha-1 and hand weeding recorded the highest reduction in total weed dry matter (73.9%), highest weed control efficiency (73.8%) and lowest weed persistence index (1.03) compared to the unweeded. The reduction in seed yield in unweeded compared to weed-free and hand weeding was 50.8% and 42.1%, respectively. As the imazethapyr-containing herbicides caused crop phytotoxicity, significantly higher crop dry weight (513 g m-2), seed yield (5.53 q ha-1), stover yield (18.0 q ha-1), gross returns and net benefits of moth bean were recorded with clodinafop-propargyl + sodium acifluorfen (312.5 g a.i. ha-1) over other herbicide treatments. Clodinafop-propargyl + sodium acifluorfen (@312.5 g a.i. ha-1) registered the minimum value of weed index (20) and highest values of herbicide efficiency index (3.9) and crop resistance index (4.70).

Keywords

Herbicide phytotoxicity Imazethapyr Weed persistence Weed interference Weed index

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