几种土壤处理除草剂防除桑园杂草试验

[目的]为了有效地抑制桑园杂草。[方法]用土壤处理除草剂50%乙草胺乳油、72%都尔乳油、50%敌草隆可湿性粉剂、25%绿黄隆可湿性粉剂对夏伐后裸露的桑园土壤进行均匀喷雾,调查4种除草剂的防治效果及对桑树、蚕的安全性。[结果]在试验的浓度下,用药60 d后,敌草隆总草的株防效最高,为92.8%,都尔、乙草胺、绿黄隆总草的株防效分别是85.9%、56.4%、21.7%。都尔、乙草胺、绿黄隆用药60 d后均未对蚕和桑树造成药害,且都尔和乙草胺提高了桑叶产量和茧层率,而敌草隆在雨水过多的年份容易对桑树产生药害。[结论]夏伐桑园以禾本科杂草为主,应选择乙草胺、都尔、敌草隆,而阔叶杂草多的桑园可选择敌草隆和绿黄隆。

Experiment on Controlling Weeds in Research Mulberry Garden with Several Kinds of Soil-applied Herbicides

[Objective] The aim was to control weeds in mulberry garden effectively.[Method] The soil-applied herbicides 50 % Acetochlor EC,72 % Dual EC,50 % Diuron WP and 25 % Chlorosulfuron WP were sprayed evenly on the bare soil in the mulberry garden after summer cutting.The controlling effect and safety to mulberry tree and silkworm of 4 kinds of herbicides were investigated.[Result] Under the experimental concentration,the controlling effect per plant on gross weeds of Diuron after spraying for 60 d was highest,being 92.8 %,and that of Dual,Acetochlor and Chlorosulfuron were 85.9 %,56.4 % and 21.7 % respectively.Dual,Acetochlor and Chlorosulfuron all didn't cause the injury to silkworm and mulberry tree after spraying for 60 d,and Dual and Acetochlor increased mulberry leaf yield and cocoon layer ratio.But Diuron was easy to produce injury to mulberry tree in the years with too much rain.[Conclusion] Acetochlor,Dual and Diuron should be chosen in the summer cutting mulberry garden with gramineae weeds as the majority and Diuron and Chlorosulfuron could be selected to use in the mulberry garden with more broad-leaf weed.