20%毒莠定水剂防除春麦田阔叶杂草

Broadleaf Weed Control in Spring Wheat with Picloram 20% AS

为有效地防除春小麦田阔叶杂草,用20%毒莠定水剂进行了田间药效试验,结果表明,适宜剂量为900ml/hm2,在小麦3～4叶期使用,防除阔叶杂草效果达80%以上,对多年生难除杂草大剌儿菜、苣荬菜等具有较好的控制效果。对小麦安全,灭草后增产显著。

Field experiments were conducted in spring wheat to determine the efficacy of picloram 20% AS. Picloram at900 ml/ha applied at the 3- to 4-leaf stage provided >80% control. Relatively good efficacy was achieved with difficult-to-control perennial weeds such as Cephalanoplos setosum and Sonchus brachyotus. Picloram did not injure wheat andsignificant yield increases were obtained following control of weeds.