Competitive ability of wheat types against wild oats (Avena ludoviciana Dur.) as influenced by sowing date.

摘要

A field experiment was conducted during the 2004/05 winter (rabi) season in Ludhiana, Punjab, India, to assess the suppression potential of wheat cultivars PBW-343, TL-1210 and PDW-274, sown on different dates (25 October, 10 November and 25 November) against wild oat (Avena ludoviciana [Avena sterilis subsp. ludoviciana]) and to evaluate their competing ability against wild oat when supplemented with clodinafop (60 g/ha). The crops sown on 25 October gave maximum plant height, dry matter and tillers had better suppressing effect on Avena ludoviciana. The lowest weed population at harvest and highest effective number of tillers per m2 row length, spike length and grain yield was observed for 25 October-sown crops, wheat cv. PBW-343 and clodinafop-treated crops. The interaction effect between dates of sowing and cultivars was significant..