P. K. SINGH, RAJESH SINGH AND S. K. SINGH*
Krishi Vigyan Kendra, Khadigram, Jamui-811 313 (Bihar), India
*(e-mail : email@example.com)
(Received : January 17, 2017; Accepted : March 18, 2017)
A field experiment was conducted at KVK, Khadigram of Jamui district in Bihar during rabi seasons of 2013-14 and 2014-15 to study the effect of different herbicides on weed control and yield of wheat. The experiment consisting of 13 treatments was replicated thrice. The experiment was laid out in RBD. The wheat variety used was PBW-502 at a seed rate of 125 kg/ha. Weed density and weed dry weight at 30 and 60 DAS showed significant variation with respect to herbicide treatments. Minimum weed infestation was observed in treatment W12 (Sulfosulfuron 25 g/ha+metsulfuron methyl 4 g/ha) which recorded weed density of 54.87 and 8.46 at 30 and 60 DAS followed by treatment W8 (Clodinafop-propargyl 60 g/ha+Carfentrazone ethyl 20 g/ha). Pooled data also revealed minimum weed dry matter 7.86 and 4.63 g recorded in treatment W12 at 30 and 60 DAS followed by treatment W8, which was found to be at par with treatment W12 at 30 DAS. Maximum weed control efficiency was also observed in treatment W12 which recorded WCE of 39.94 and 49.07% at 30 and 60 DAS followed by treatment W8. Among growth parameters, maximum pooled values for plant height and number of tillers were observed in treatment W12 followed by treatment W8. Yield attributing characters viz., number of effective tillers running row/meter and number of grains/spike also differed significantly with respect to herbicide treatments. Grain and straw yields also differed significantly among herbicidal treatments. Maximum grain and straw yield was recorded as 3.8 and 5.69 t/ha, respectively, under treatment W12 closely followed by treatment W8. All tank mix applications of herbicide showed maximum weed control efficiency and maximum values for grain and straw yield than single application of herbicide.
Key words :Herbicide, sulfosulfuron, metsulfuron, clodinafop, carfentrazone