Vol. 10, Issue 12 (2021)

Author(s):
Mahendra Pratap Singh, Jai Dev Sharma, Amit Kumar, Pradeep Kumar Kanaujiya and Ankit Kumar

Abstract:
The experiment was conducted at Agronomy Research Farm of N.D. University of Agriculture and Technology, Acharya Narendra Nagar (Kumarganj), Ayodhya (U.P.) during Kharif season of 2015-16, to study the Effect of pre and post emergences herbicide on phytotoxicity, management of weeds and weed dynamics in blackgram (Vigna mungo L.). Twelve weed management treatments comprised viz., Imazethapyr 70 g ha^-1 PRE, Imazethapyr 80 g ha^-1 PRE, Imazethapyr 70 g ha^-1 POE (3-4 leaf stage of weeds), Imazethapyr 80 g ha^-1 POE (3-4 leaf stage of weeds), Imazethapyr + imazamox (RM) 70 g ha^-1 PRE, Imazethapyr + imazamox (RM) 80 g ha^-1 PRE, Imazethapyr + imazamox (RM) 70 g ha^-1 POE (3-4 leaf stage of weeds), Imazethapyr + imazamox (RM) 80 g ha^-1 POE (3-4 leaf stage of weeds), Pendimethalin 1000 g ha^-1 PRE, Imazethapyr + Pendimethalin (RM) 1000 g ha^-1 PRE, Hoeing (20&40 DAS), Weedy check. Results revealed that pre-emergence application of imazethapyr + pendimethalin 1000 g ha^-1 proved superior over rest of the treatments with respect to weed density of blackgram followed by imazethapyr + imazamox (RM) 80 g ha^-1, imazethapyr + imazamox (RM) 70 g ha^-1 and pendimethalin 1000 g ha^-1. Post emergence application of imazethapyr + imazamox (RM) 80 g ha^-1 was produced significantly more grin yield as compared to rest of the treatments.