硝磺草酮·莠去津550克/升悬浮剂防除夏玉米田杂草田间药效试验

Efficacy of mesotrione·atrazine 550g/L WG for Control of Weeds in Summer Maize Field

通过硝磺草酮·莠去津550克／升悬浮剂在夏玉米苗2、4、6叶期对田间杂草进行防效试验，结果表明：其对夏玉米田间禾本科杂草和阔叶杂草具有较好的防除效果，且对夏玉米生长安全。在60～120mL／667m。剂量下，药后30d，对禾本科杂草和阔叶杂草的株防效分别为76．1％～100．0％，95．5％～100．0％，鲜重防效为82．6％～100．0％，且2、4叶期施药，对夏玉米产量增产8．4％～27．5％。

Field experiments of mesotrione atrazine 550g/L WG were carried out for control of weeds in maize field at the 2,4,6 leaf stage of maize.The results showed that it had a good control effect of gramineous weeds and broadleaf weeds The stem control effects of gramineous weeds and broadleaf weeds were 76.i%-100.0% and 95.5%-100.0~/o, the fresh weight effects were 82.6%-100.0% with the dosage of 60-120mL/667m2 30 days after application, the increase of production were 8.4%-27.5%. No negative effects on maize growth were found.