Herbicides efficacy for managing weeds in greengram and their residual effect on succeeding mustard Singh S.P.*, Yadav R.S., Bairwa R.C., Kumawat Amit Agricultural Research Station, Swami Keshwanand Rajasthan Agricultural University, Bikaner, Rajasthan, 334 006 *Corresponding author: spbhakar2010@gmail.com
Online published on 27 December, 2017. Abstract A field experiment was conducted at Research Farm of S. K. Rajasthan Agricultural University, Bikaner during Kharif 2014 and 2015 to study the efficacy of pre-and post-emergence herbicides in managing weeds in greengram (Vigna radiata) and herbicides carryover effect on Indian mustard (Brassica juncea) grown during succeeding Rabi seasons of 2014–15 and 2015–16. Ten weed control treatments, viz. pendimethalin 1000 g/ha pre-emergence (PE), imazethapyr 50 and 70 g/ha (early post-emergence; PoE), imazethapyr + pendimethalin (ready mix) 800, 900, and 1000 g/ha pre-emergence (PE), imazethapyr + imazamox 60 and 70 g/ha, two hand weedings at 20 and 40 days after seeding (DAS) and weedy check were evaluated in greengram grown in three replications with randomized block design (RBD). Two hand weedings at 20 and 40 DAS resulted in lowest weed density of broad-leaf and grassy weed, total weed biomass at 60 days after sowing, significantly highest number of branches per plant, pods per plant, seeds per pod and seed and straw yield compared to other treatments. Imazethapyr + pendimethalin 800 g/ha PE was at par with two hand weedings in managing weeds and increasing greengram yield. Application of herbicides did not cause any adverse effect on succeeding mustard in both years. Top Keywords Greengram, Imazethapyr, Mustard, Herbicide residues. Top |