摘要
[目的]为了明确60 g/L苯并双环酮SC在不同使用剂量的情况下,防除移栽稻杂草效果、杀草谱、安全性及施用技术等项指标,采用茎叶喷雾施药,定期调查的方法进行田间药效试验。[结果]苯并双环酮杀草谱主要包括莎草科杂草、阔叶杂草。施用时间为在水稻移栽后4~8叶期,推荐剂量为200~250 g a.i./hm2,施药后40 d对阔叶杂草、莎草科杂草株防效达85.1%~95.1%,与吡嘧磺隆联合使用时,防效更好。水稻移栽前使用丁草胺封闭,扩大杀草谱。[结论]正常使用量对水稻生长安全,与人工除草相比,产量差异不大。对阔叶杂草、莎草科杂草防效较好。
In order to clarify the effect,weed spectrum,safety and application of benz-obicyclon 60 g/L SC at different doses,field trials were carried out using methods of stems-leaves spray and regular survey.[Results] The results showed that weed spectrum included broad-leaved and sedge weed,the suitable application time is at 4-8 leaf stage,a dose of 200-250 g a.i./ha,integrated control effect reaches 85.1-95.1% to broad-leaved and sedge weeds after 40 d.The control effect was better with pyrazosulfuron in combination.Using butachlor before transplanting rice can expand weed spectrum.[Conclusions] Normal dosage is safe to rice growth,and there is no evident yield difference compared with manual weeding.Benz-obicyclon showed good control to broad-leaved and sedge weed.
出处
《农药》
CAS
北大核心
2011年第12期915-917,共3页
Agrochemicals
关键词
苯并双环酮
水稻
杂草防效
安全性
benzobicyclon
rice
efficiency of control weed
security
