40%三甲苯草酮WDG防除春小麦田野燕麦效果及安全性试验

Effect and Safety of 40% Tralkoxydim WDG Against Oat inSpring Wheat Field

为了更好防治青海省春小麦田野燕麦杂草,对40%三甲苯草酮WDG防除春小麦田野燕麦的效果、适宜用量及对春小麦的安全性进行田间小区试验。设40%三甲苯草酮WDG 975.00g/hm^(2)(T1)、1087.50g/hm^(2)(T2)、1200.00g/hm^(2)(T3)、2175.00g/hm^(2)(T4)不同处理兑水300L/hm^(2),于野燕麦3叶1心至4叶1心期,春小麦三3叶至5叶期茎叶喷雾处理。结果表明,40%三甲苯草酮WDG对野燕麦株防效和鲜重防效达70%以上,推荐使用有效含量480g/hm^(2)(商品用量1200g/hm^(2)),于春小麦3叶至5叶1心期,野燕麦3叶1心—4叶1心期茎叶喷雾,施用后作物安全且增产8.58%以上。40%三甲苯草酮WDG安全性好、防效高、持效期长,本研究为该药剂在小麦田的应用和后期推广提供了数据支撑,具有实际应用价值。

In order to better control wild oat weeds in spring wheat field in Qinghai province,field plot experiments were carried out on the effect,appropriate dosage and safety of 40%tralkoxydim WDG in the control of oat in the field of spring wheat.40%tralkoxydim WDG 975.00g/hm^(2)(T1),1087.50g/hm^(2)(T2),1200.00g/hm^(2)(T3)and 2175.00g/hm^(2)(T4)were mixed with water 300L/hm^(2) respectively,and were sprayed on the stem and leaf of wild oats at 3-leaf and 1-heart to 4-leaf and 1-heart stage,and spring wheat at 3-leaf to 5-leaf stage.The results showed that the control effect of 40%tralkoxydim WDG on wild oat plant and fresh weight was more than 70%.The effective content of 40%tralkoxydim WDG recommended to using was 480g/hm^(2)(the commercial dosage was 1200g/hm^(2)),sprayed on the stem and leaf of spring wheat at 3-leaf to 5-leaf stage,and on wild oats at 3-leaf and 1-heart stage to 4-leaf and 1-heart stage,and after application,the crop was safe,and the yield increased by 8.58%.40%trimethyloxalone WDG has good safety,high control effect and long duration.This study provides data support for the application and later promotion of this agent in wheat field,which has practical application value.