EFFICACY OF ACM – 9 (CLODINAFOP PROPARGYL + METRIBUZIN) ON WEEDS, GROWTH AND YIELD OF WHEAT

EFFICACY OF ACM – 9 (CLODINAFOP PROPARGYL + METRIBUZIN) ON WEEDS, GROWTH AND YIELD OF WHEAT

Pratap Singh*, Navneet Pareek, Abnish Kumar, Kavita Satyawali, Akshita Banga, Neema Bisht and D.B.Singh

Department of Agronomy, G.B. Pant University of Agriculture and Technology, Uttarakhand-263145
[Corresponding author E-mail*: vpratapsingh@rediffmail.com]
Received: 14-08-2015 Accepted: 23-09-2015
Abstract:
A field experiment was conducted during Rabi season in two consecutive years 2010-11 and 2011-12 at N. E. Borlaug Crop Research Centre, G.B. Pant University of Agriculture and Technology, Pantnagar to test the efficacy of clodinafop propargyl and metribuzin applied alone and in combination for the control of mixed weed flora of wheat crop. The predominant weed species in experimental area were Phalaris minor, Polygonum plebenjium, Medicago denticulata, Melilotus indica, Chenopodium album, Coronopus, Rumex and Cyperus rotundus. All weed control treatments significantly reduced the weed density as well as dry accumulation of weeds resulting significant increase in yield of wheat over weedy check in both the years of experimentation. The maximum suppression of density as well as dry matter of weeds and highest weed control efficiency were obtained with the combination of clodinafop propargyl+metribuzin applied as post emergence at higher doses (1000 and 1200 g/ha) and this was also comparable with twice hand weeding. The density of all the weeds decreased with increasing the doses of clodinafop propargyl+metribuzin from 500 to 1200 g/ha. However, highest grain yield of wheat was recorded with combination of clodinafop propargyl+metribuzin applied at 1200 g/ha (4092 kg/ha) during 2010, while in 2011 the highest yield was obtained at its lower dose applied at 1000 g/ha (4163 g/ha). Combination of clodinafop propargyl+metribuzin at 1200 and 1000 g/ha increase the wheat yield 18.2 and 97.4% during 2010 and 2011, respectively, over the weedy check. The grain yield among the combination of clodinafop propargyl+metribuzin at various doses were found at par to each other and even its lower dose (500 g/ha) also yielded comparable grain yield with twice hand weeding at 30 and 60 DAS.

Keywords: efficacy, clodinafop propargyl,  metribuzin, wheat, weed

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