Vol. 11, Issue 7 (2022)

Author(s):
Deepak Kumar, Anil Kumar, R Puniya, Vikas Sharma, Manish Sharma and RK Salgotra

Abstract:
Pot experiment was conducted during rabi season of 2019-20 and 2020-21. The pot screening bioassay experiments conducted during Rabi season of 2019-20 and 2020-2021 at research farm Division of Agronomy, SKUAST-Jammu, main campus Chatha which were laid out in completely randomized design with six treatments and four replications for each twenty-five P. minor biotypes. The P. minor biotypes were evaluated against five recommended herbicides (isoproturon, sulfosulfuron, clodinafop, fenoxaprop, and pinoxaden) with their graded doses (0, ^1/4X, ^1/2X, X (Recommended dose), ²X and ⁴X) i.e. isoproturon (0, 187.50, 375, 750, 1500 and 3000 g/ha.), sulfosulfuron (0, 6.25, 12.5, 25, 50 and 100 g/ha.), clodinafop (0, 15, 30, 60, 120 and 240 g/ha.), fenoxaprop (0, 25, 50, 100, 200 and 400 g/ha.) and pinoxaden (0, 10, 20, 40, 80, 160 g/ha.). Sunderbani, Rajouri biotype (33.413” N, 74.284” E, 580 m) was taken as susceptible. Out of 25 biotypes 03 were found resistant which were characterized by morphologically using different parameters and found that morphologically resistant biotypes were higher in plant height, number of tillers, spike length, spike width, leaf blade length, leaf blade width and test weight compared to susceptible biotype of P. minor although, seed colour was observed dark brown in susceptible and resistant biotypes.