摘要
为比较不同剂型呋虫胺制剂对稻秆潜蝇的防治效果,在多地开展了田间药效试验。结果表明:水稻移栽前喷施20%呋虫胺悬浮剂1 000倍液作为送嫁药可有效防治稻秆潜蝇,保苗效果达93.1%;直播稻田苗期喷施20%呋虫胺悬浮剂1.2和1.5 L/hm^(2)的保苗效果在90%以上;中稻田晒田前撒施3%呋虫胺颗粒剂7.5 kg/hm^(2)防治稻秆潜蝇的效果好,防效达92%以上;当有效成分呋虫胺的用量相同时,颗粒剂撒施的防效显著高于悬浮剂喷雾的防效;同时,相同药剂相同剂量处理晒田前施用的防效均显著高于晒田后施用的防效。综上所述,20%呋虫胺悬浮剂作为送嫁药在秧苗移栽前喷雾或直播稻田苗期喷施可有效防治苗期稻秆潜蝇;中稻田在晒田前撒施3%呋虫胺颗粒剂(7.5 kg/hm^(2))并保水3-5 d可有效防治该虫,从而达到保穗保产的目的。
In order to evaluate the control effects of different dinotefuran formulations on Chlorops oryzae larvae,field trials were conducted at several sites.The results showed that spraying a 1000 times diluent of dinotefuran 20%SC before seedling-transplanting achieved a 93.1%seedling-protecting effect.When sprayed at the dosages of 1.2 L/hm^(2) and 1.5 L/hm^(2) in seedling stage in direct-seeding paddy,dinotefuran 20%SC achieved 91.9%and 93.3%seedling-protecting effect respectively.Through broadcasting before drying milddle rice field,7.5Kg/hm^(2) of dinotefuran 3%GR produced a 92.3%efficacy for panicle-protecting.At the same effective dosage,the efficacy of broadcasting dinotefuran 3%GR was sigificantly higher than that of spraying dinotefuran 20%SC.In the same formulation and dosage,applying before drying the paddy field will get a significantly higher control effect than after drying the paddy field.In summary,spraying dinotefuran 20%SC before transplanting or in the seedling stage in direct-seeding fields can effectively prevent the damages caused by C.oryzae,and broadcasting dinotefuran 3%GR for middle rice(7.5kg/hm^(2))and meanwhile retaining the depth of field water about 3-5 cm for 3-5 days before drying paddy field can control C.oryzae effectively,thus achieving the purpose of maintaining ears and ensuring the yield.
作者
田萍
王建田
张政兵
李新文
丁文兵
贺华良
李有志
潘峰
TIAN Ping;WANG Jian-tian;ZHANG Zheng-bing;LI Xin-wen;DING Wen-bing;HE Hua-liang;LI You-zhi;PAN Feng(College of Plant Protection,Hunan Agricultural University,Changsha 410128,PRC;Agriculture and Rural Bureau of Longhui County,Longhui 422200,PRC;Plant Protection and Inspection Station of Hunan Province,Changsha 410005,PRC;Plant Protection and Inspection Station of Yongshun County,Yongshun 416700,PRC)
出处
《湖南农业科学》
2021年第6期57-60,共4页
Hunan Agricultural Sciences
基金
湖南省教育厅科学研究项目(18A093,20A242)。
关键词
稻秆潜蝇
呋虫胺
剂型
剂量
施用时期
防治效果
Chlorops oryzae
dinotefuran
formulation
dosage
the time period of application
control effect
