15%硝磺草酮悬浮剂防治夏玉米田杂草药效试验研究

Research on Effect of 15% Mesotrione SC on Controlling Weeds in Summer Corn Field

以玉米品种强盛31号为试材,进行了15%硝磺草酮悬浮剂对玉米田杂草的田间防效试验,并明确了其对玉米生长的安全性。结果表明:15%硝磺草酮悬浮剂对夏玉米田杂草有较好的防除效果,药后30 d,15%硝磺草酮悬浮剂用量为135.0～270.0 g/hm2时,对玉米田杂草的总株防效均>83%、总鲜重防效均>94%,除草效果显著,且持效期较长;15%硝磺草酮悬浮剂使用剂量在112.5～270.0 g/hm2范围内对玉米生长安全,对玉米产量影响不大。建议在阔叶杂草2～4叶期、禾本科杂草5叶期前,使用15%硝磺草酮悬浮剂135.0～157.5 g/hm2对玉米田杂草进行防治。

Using corn variety Qiangsheng No. 31 as the experimental material, the effect of 15% mesotrione SC on controlling weeds in summer corn field was studied, and the security on corn growth was made clear. The results showed that 15% mesotrione SC had better effects on controlling weeds in summer corn field. After spraying the herbicide with dosage of 135.0 -270.0 g/hm2 30 d, the total number of weed control effect was more than 83% and the total fresh weight control effect was above 94%, 15% mesotrione SC had significant and long persistence control effects on controlling weeds. The corn was safety and production was not affected spraying 15% mesotrione SC with dosage of 112.5 - 270. 0 g/hm2. Finally 15% mesotrione SC with dosages of 135.0 - 157.5g/hm2 were suggested to controlling weeds in summer corn field in the 2 -4 leaves of broadleaf weeds and grass weeds before the 5 leaves stage.