2种增效剂对春玉米田除草剂的减量增效作用

为了明确2种增效剂对除草剂的减量效应,为除草剂科学减施及增效剂安全使用提供数据基础,2019年在西北荒漠绿洲生态区春玉米田,以38.5％硝·精·莠去津CS和26.7％噻隆·异噁酮SC作为茎叶处理剂,测定了激健和辉丰2种增效剂在不同施药剂量下的除草效果.结果 表明:在38.5％硝·精·莠去津CS 2310 mL/hm和2...

Decrement and synergistic effect of two synergist on herbicides in spring corn field

The effect of reducing herbicide with synergist as the data basis for the herbicide reduction application was clarified in the study. The influence of two synergists Jijian and Huifeng on herbicide at different dosages were tested in the field where mesotrione·dexamethasone·atrazine 38.5% CS and thiencarbazone methyl·isoxaflutole 26.7% SC were used as the herbicides for the treatment of stems and leaves in the spring corn area of northwest desert oasis ecological zone in 2019. The results showed that mesotrione·dexamethasone·atrazine 38.5% CS was better than thiencarbazone methyl·isoxaflutole 26.7% SC when applied alone under the recommended dosage level (2 310 mL/hm2 and 120.15 mL/hm2) or on the basis of this level reducing 15% dosage and 30% dosage. When the dosage of mesotrione·dexamethasone·atrazine and thiazsulfuron·methly·isoxone were reduced by 15% (30%) and synergists Jijian and Huifeng were separately added, two synergists both had significant synergy on mesotrione·dexamethasone·atrazine 38.5% CS and thiencarbazone methyl·isoxaflutole 26.7% SC (P<0.05). Under the same herbicide dosage, Jijian was better than Huifeng and the effect was the worst when just using single herbicide. The herbicidal effect of 30% dosage reduction was lower than that of 15% reduction. Therefore, mesotrione·dexamethasone·atrazine 38.5% CS can be chosen for the stem and leaf treatment in the spring corn field in the zone, and its applied dosage 1 617-1 963.50 mL/hm2 were recommended with synergist Jijian at the dosage 120.15 mL/hm2.