HERBICIDES AND THEIR DOSES EFFECTS ON WILD ONION (Asphodelus tenuifolius Cav.) IN CHICKPEA.

This study aims to determine dose requirements of herbicides for controlling Asphodlus tenuifolius on farmer's field in chickpea during 2005-06 and 2006-07. Five herbicides pendimethalin, s-metolachlor, fenoxaprop-p-ethyl, MCPA and isoproturon with four doses were studied in the trials. MCPA produced phytotoxic effect on both weed and crop and also completely inhibited crop and weed growth. Isoproturon was less effective on A. tenuifolius with less phytotoxicity on crop. Best seed yield (1164 and 1150 kg ha^-1) was recorded in preemergence herbicides at high dose as compared to fenoxapropp- ethyl (1088 kg ha^-1). Next year (2006-2007) again the same herbicides were tested while MCPA was replaced by clodinafop propargyl (post-emergence) due to its phytotoxicity on crop. Almost similar results were recorded with the only difference of herbicides clodinafop propargyl. The highest seed yield of 1109 kg ha^-1 was recorded each for pendimethalin and s-metolachlor while it was statistically similar with the yield of fenoxaprop-pethyl (1107 kg ha^-1). Lower 0.5x and 1.0X doses of post emergence herbicides produced good results as compared to 1.5X. Pre emergence herbicides were found to be effective only at 1.5X dose. [ABSTRACT FROM AUTHOR]