Effect of Crop and Herbicide Rotations on Weed Dynamics with Special Reference to Asphodelus tenuifolius in Mustard in Arid Region of Rajastban

Crop rotation of illustard-wheat-wheat-mustard was most effeclive in arresting populalton of Asphodelus tenuifolius with similar effect on weed dry weight. As a result, it improved yield attributes and seed yield of mustard by 667 kg ha⁻¹ compared with continuous mustard rotation. The herbicidal control (tluchloralin at 1.0 kg ha⁻¹ in mustard and 2, 4-D at 0.5 kg ha⁻¹ in wheat) in mustard-wheat-wheat-mustard rotation controlled A. tenuifolius and total weeds effecltvely and thus significantly enhanced the seed yield of mustard. On the contrary, use of tluchloralin alone without any herbicide rotation in continuous mustard did not control A. tenuifolius effectively and thereby, reduced the seed yield of mustard compared to all other rotations.