摘要
为明确新型药剂环丙氟虫胺对水稻二化螟、稻纵卷叶螟的防治效果及其安全性,2022~2023年分别用人工喷药和无人机施药开展了20%环丙氟虫胺悬浮剂对二化螟和稻纵卷叶螟的药效试验。结果表明,在二化螟田间枯鞘初现期连续2次(间隔10 d)策略性施用20%环丙氟虫胺悬浮剂300 mL/hm^(2),能起到良好的控制效果,防效>95%。20%环丙氟虫胺悬浮剂300 mL/hm^(2)添加矿物油助剂150 mL/hm^(2)对稻纵卷叶螟卵孵高峰期飞防保叶效果75%~80%(控虫效果62%~89%),具有显著增效效应。无人机飞防稻纵卷叶螟对天敌蜘蛛虫口减退率相对影响较小,药后7~10 d蜘蛛种群可基本恢复。因此,二化螟防控可以初害期连续2次(间隔10 d)施用20%环丙氟虫胺悬浮剂300 mL/hm^(2),稻纵卷叶螟防控需在卵孵高峰同样剂量添加矿物油助剂150 mL/hm^(2)飞防,也可与30%茚虫威水分散粒剂混用飞防稻纵卷叶螟。20%环丙氟虫胺悬浮剂对水稻(甬优1540)具有较好的安全性。
To access the control effect and safety of the new pesticide cyproflanilide against Chilo suppressalis and Cnaphalocrocis medinalis,efficacy trials of 20%cyproflanilide suspension concentrate(SC)were conducted from 2022 to 2023 using manual spraying and unmanned aerial vehicle(UAV)application method.The results showed that the strategically applying of 20%cyproflanilide SC at a rate of 300 mL/hm^(2)twice(with a 10-day interval)during the initial stage of sheath wilting for Chilo suppressalis achieved excellent control,with a control effect exceeding 95%.Additionally,adding 150 mL/hm^(2)of mineral oil adjuvant to 20%cyproflanilide SC at 300 mL/hm^(2)during the peak egg hatching period of Cnaphalocrocis medinalis resulted in a leaf protection effect of 75%~80%(insect control effect of 62%~89%),indicating a significant synergistic effect.UAV application for the control of Cnaphalocrocis medinalis had a relatively smaller impact on the reduction of natural enemy spider populations,which generally recovered within 7~10 days after application.Therefore,for the control of Chilo suppressalis,20%cyproflanilide SC should be applied at 300 mL/hm^(2)twice(with a 10-day interval)at the initial damage stage,For Cnaphalocrocis medinalis,the same dosage with the addition of mineral oil adjuvant at 150 mL/hm^(2)can be used for aerial application during the peak egg hatching period.Alternatively,it can be mixed with 30%indoxacarb water-dispersible granules for aerial application against Cnaphalocrocis medinalis.The 20%cyproflanilideSC demonstrates good safety forrice(Yongyou1540).
作者
陈红
孙肖雨
梁梦琦
明珂
Chen Hong;Sun Xiaoyu;Liang Mengqi;Ming Ke(Linhai City Agricultural Technology Extension Center,Linhai Zhejiang 317000,China;Zhejiang Province Plant Protection Quarantine and Pesticide Management Station,Hangzhou Zhejiang 310009,China;Taizhou Academy of Agricultural Sciences,Taizhou Zhejiang 318000,China;Taizhou Municipal Bureau of Agriculture and Rural Affairs,Taizhou Zhejiang 318000,China)
出处
《农药科学与管理》
CAS
2024年第10期53-59,共7页
Pesticide Science and Administration
关键词
环丙氟虫胺
二化螟
稻纵卷叶螟
蜘蛛
防控效应
cyproflanilide
chilo suppressalis
cnaphalocrocis medinalis
spider mites
control effect
