Assessment of Herbicidal Mixtures for Effective Weed Management in Blackgram under Irrigated Conditions of Pudukkottai District

An On Farm Trial was conducted to assess the herbicide for effective weed management in irrigated black gram in Pudukkottai district during the year 2022-2023 through ICAR-Krishi Vighyan Kendra, Vamban, Pudukkottai. Five farmer’s fields were selected in the Mangalakoil village of Karambakudi block. The technological options adopted in the On Farm Trial were TO1: EPOE application of quizalofop ethyl @ 50 g a.i/ha and imazethapyr @ 50 g a.i /ha on 15 – 20 DAS, TO2: Sodium Acifluorfen 16.5% + Clodinafop- Propargyl 8% EC (ready mix) at 1000 ml/ha and Farmers practice: Two hand weeding on 15 and 30 DAS. Herbicide dose was calculated and were applied as per the treatment schedule in the farmer’s field and observation on weed density was taken at periodical intervals. Weed dry weight and weed control efficiency were calculated. Outside the OFT plots, un weeded control plot was maintained for taking observation on weed count and to calculate weed control efficiency. During the cropping period one off campus training at Mankalokoil village was conducted to enrich the knowledge among farmers on the use of early post emergence herbicide for the control on weeds and critical technologies to be followed in blackgram. From the average yield obtained and economics worked out, it was concluded that Early post emergence application of Sodium Acifluorfen 16.5% + Clodinafop- Propargyl 8% EC (ready mix) at 1000 ml/ha is recommended to the farmers of Pudukkottai for the control of broad spectrum of weeds with higher yield and economic returns in blackgram.