随着麦田秋季化除面积的扩大,我县以禾本科杂草为主的稻茬麦田的草害问题已基本得到缓和,但每年仍有部分田块因种种原因药效发挥不好或者漏治,一到春季麦、草竞争剧烈却无药可治。针对这一问题,1988年春进行异丙隆(75％可湿粉,西德)春除试验。该试验田每平方市尺有杂草296株,其中:禾本科占82.5％,牛繁缕占9％,荠菜占4.6％,猪殃殃占2.8％,大巢菜占1.1％。施药时间3月20日,此时小麦生育期临近拔节。结果如下: With the expansion of the field of autumn in autumn, the problem of grassland damage in rice cropping areas dominated by gramineous weeds has basically been alleviated. However, there are still some plots that are ineffective for various reasons, A spring wheat, grass competition is intense but no cure. In response to this problem, in spring 1988, isoproturon (75% wettable powder, West Germany) spring addition test. There are 296 weeds in the test plot per square foot, of which: Poaceae accounted for 82.5%, Niu Fan straws accounted for 9%, shepherd’s purse 4.6%, 2.8% Apis mellifera, 1.1% of the big vetch. Application time March 20, when the wheat growth period near the jointing. The result is as follows: