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

This study aims to determine dose requirements ofherbicides for controlling Asphodlus tenuifolius on farmer’s fieldin chickpea during 2005-06 and 2006-07. Five herbicides pendimethalin, s-metolachlor, fenoxaprop-p-ethyl, MCPA andisoproturon with four doses were studied in the trials. MCPAproduced phytotoxic effect on both weed and crop and alsocompletely inhibited crop and weed growth. Isoproturon wasless effective on A. tenuifolius with less phytotoxicity on crop.Best seed yield (1164 and 1150 kg ha-1) was recorded in preemergenceherbicides at high dose as compared to fenoxapropp-ethyl (1088 kg ha-1). Next year (2006-2007) again the sameherbicides were tested while MCPA was replaced by clodinafoppropargyl (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 1109kg 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 postemergence herbicides produced good results as compared to1.5X. Pre emergence herbicides were found to be effective onlyat 1.5X dose.