摘要
为压低前期虫口基数,筛选对草地贪夜蛾防效较好的种子处理剂,设计并开展此试验。试验结果表明,几种种衣剂对玉米生长安全,在玉米生长前期4个处理对草地贪夜蛾的防效均超过60%。防效最好的为40%溴酰·噻虫嗪FS 450 g/100 kg种子处理,平均保苗率为89.97%,播种后21 d虫口防效为91.21%;其次为50%氯虫苯甲酰胺FS 680 g/100 kg种子处理,保苗率为80.18%,虫口防效为82.1%,但其出苗率与50%氯虫苯甲酰胺FS 530 g/100 kg种子处理相比有所下降。50%氯虫苯甲酰胺FS 530 g/100 kg种子处理出苗率最高,为92.67%,平均保苗率为70.44%,虫口防效为61.54%。35%苯甲·吡虫啉FS 500 g/100 kg种子处理出苗率和保苗率都是几个处理中最低的。在生产上可以推广使用40%溴酰·噻虫嗪FS 450 g/100 kg种子和50%氯虫苯甲酰胺FS 530 g/100 kg种子。
In order to reduce initial population number,field efficacy trials were devised and carried out to explore the control efficacy of corn seed-coating against Spodoptera frugiperda.Results showed that several seed-coating were safe to maize,and the control effects were higher than 60%in the early stage of maize growth.The seed with 40%cyantraniliprole+thiamethoxam FS at the dosage of 450 g/100 kg showed good seedling protecting effect and the controling effect on S.frugiperda,which were 89.97%,91.21%after seeding for 21 d,respectively.The second was seed with 50%chlorantraniliprole FS at the dosage of 680 g/100 kg,seedling protecting effect and the controling effect were 80.18%,82.1%,respectively.But compared to seed with 50%chlorantraniliprole FS at the dosage of 530 g/100 kg,the emergence rate was decreased.The seed treatment with 50%chlorantraniliprole FS 530 g/100 kg showed high emergence rate,which seedling protecting effect and the controling effect were 70.44%,61.54%after seeding for 21 d,respectively.However,35%difenoconazole+imidacloprid FS at the dosage of 500 g/100 kg showed low emergence rate and seedling protecting effect.They could be used at 40%cyantraniliprole+thiamethoxam FS at the dosage of 450 g/100 kg and 50%chlorantraniliprole FS at the dosage of 530 g/100 kg in production.
作者
张欣芳
夏中卫
毛海艳
邵统响
魏颖
张芳
ZHANG Xinfang;XIA Zhongwei;MAO Haiyan;SHAO Tongxiang;WEI Ying;ZHANG Fang(Agricultural Technology Extension Center of Suining Country,Jiangsu Suining 221200,China;Plant Protection and Quarantine Station of Jiangsu Province,Nanjing 210009,China)
出处
《现代农药》
CAS
2021年第2期55-58,共4页
MODERN AGROCHEMICALS
基金
江苏现代农业(特粮特经)产业技术体系绿色防控创新团队(JATS[2019]330)。
关键词
玉米种子处理剂
草地贪夜蛾
防效
corn seed-coating
Spodoptera frugiperda
field efficacy
