二甲戊灵·丙炔氟草胺对大蒜田杂草的田间防效及安全性评价

Efficacy of Pendimethalin·Flumioxazin against Weeds in Garlic Field

[目的]为明确45%二甲戊灵·丙炔氟草胺微囊悬浮-悬浮剂对大蒜田杂草的田间防治效果。[方法]采用大蒜播后苗前土壤喷雾处理,分别于2018、2019年开展了45%二甲戊灵·丙炔氟草胺微囊悬浮-悬浮剂的田间小区试验。[结果]45%二甲戊灵·丙炔氟草胺微囊悬浮-悬浮剂789.75~1046.25 g a.i./hm^(2)对大蒜田禾本科杂草、阔叶杂草均有较好的土壤封闭除草效果,药后45 d,总草株防效为96.2%~99.7%,鲜质量防效为96.5%~99.9%,杂草防效显著高于对照药剂单剂330 g/L二甲戊灵乳油742.5 g a.i./hm^(2)处理和50%丙炔氟草胺可湿性粉剂45 g a.i./hm^(2)。[结论]45%二甲戊灵·丙炔氟草胺微囊悬浮-悬浮剂可作为防治大蒜田杂草的新型高效安全低用量药剂,田间推荐于大蒜播后出苗前使用,使用剂量为789.75~1046.25 g a.i./hm^(2)。

[Aims]This study aims to evaluate the efficacy of a new herbicide pendimethalin·flumioxazin 45%ZC against weeds in garlic field.[Methods]Field trials were conducted in 2018 and 2019 by methods of the soil spray treatment before seedling emergence.[Results]The pendimethalin·flumioxazin 45%ZC had a good control efficacy to the grassy weeds and the broadleaf weeds in garlic field at 789.75-1046.25 g a.i./ha.The plant quantity effect and the fresh weight effect were 96.2-99.7 and 96.5-99.9%respectively 45 days after treatment,it had significantly better control effects than the treatment of pendimethalin 330 g/L EC 742.5 g a.i./ha and the treatment of flumioxazin 50%WP 45 g a.i./ha.[Conclusions]The pendimethalin·flumioxazin 45%ZC can be used as a new high efficacy and low dosage pesticide for control of weeds in garlic field.Field trials were conducted by methods of the soil spray treatment before seedling emergence,the recommended dosages was 789.75-1046.25 g a.i./ha.