65%硝磺草酮·氯氟吡氧乙酸异辛酯·莠去津可湿性粉剂防除玉米田杂草药效试验

Control effect of mesotrione·fluroxypyr-meptyl·atrazine 65% WP against weeds in cornfield

[目的]明确65%硝磺草酮·氯氟吡氧乙酸异辛酯·莠去津可湿性粉剂对玉米田杂草的防治效果、最佳田间使用剂量及对玉米的安全性。[方法]采用茎叶喷雾施药处理,定期调查的方法进行田间药效试验。[结果]65%硝磺草酮·氯氟吡氧乙酸异辛酯·莠去津可湿性粉剂在1155~2310 g a.i./hm^(2)的用量下,效果显著优于对照药剂,且对应有效成分用量少于对照药剂;未见对玉米产生明显药害。综合用药成本及效果考虑,推荐使用量为1155~1320 g a.i./hm^(2)。[结论]65%硝磺草酮·氯氟吡氧乙酸异辛酯·莠去津可湿性粉剂能够有效防除玉米田杂草并对玉米具有较好的安全性。

[Aims] The study aims to confirm the control effect, optimum dosage and security of mesotrione·fluroxypyr-meptyl·atrazine 65% WP in cornfield. [Methods] Field trials were carried out by using methods of inter-row directed stems-leaves spraying and regular survey. [Results] At the dosage of 1155-2310 g a.i./ha, the effect of mesotrione·fluroxypyr-meptyl·atrazine 65% WP was significantly better than that of the control agent, and the dosage of the corresponding active ingredient was less than that of the control agent. There was no obvious damage to corn.Considering the cost and control effect, the recommended dosage is 1155-1320 g a.i./ha. [Conclusions] Mesotrione·fluroxypyr-meptyl·atrazine 65% WP showed good control to weeds in cornfield and was safe on corn growth.