摘要
为进一步探明多杀霉素对玉米安全性、对草地贪夜蛾的防效、持效期及田间用法用量,筛选出防控玉米草地贪夜蛾的高效、安全、环境友好的药剂。选用20%多杀霉素悬浮剂150 mL/hm^(2)、225 mL/hm^(2)、300 mL/hm^(2),5%甲维盐微乳剂300 mL/hm^(2),15%茚虫威悬浮剂225 mL/hm^(2),200 g/L氯虫苯甲酰胺悬浮剂225 mL/hm^(2)开展田间小区药效试验。结果表明:多杀霉素悬浮剂对玉米安全、对草地贪夜蛾具有较好的防治效果,随着每公顷用量的增加,防效和持效期增加,较为突出的是多杀霉素225、300 g/hm^(2)处理,第1、2次药后1~3 d,防效均在90%以上;药后14 d时,防效均在75%以上,保苗效果均在80%以上。此外,第2次药后21 d,防效仍在70%以上,保苗效果在60%以上,2个处理下草地贪夜蛾对玉米的为害指数在13.18~14.30之间,危害等级控制在2级以内,玉米受损程度轻发生。在实际生产中推荐选用20%多杀霉素悬浮剂225 mL/hm^(2)用量防治玉米草地贪夜蛾即可,在玉米苗期,可喷雾施药1次;在喇叭口期,可采用药土法拌沙撒施1次。
In order to further explore the safety of spinosyn in maize,the control effect,duration,field usage and dosage on Spodoptera frugiperda,and to screen out effective,safe and environmentally friendly agents for controlling Spodoptera frugiperda,Spinosyn 20%SC 150 mL/hm^(2),225 mL/hm^(2),300 mL/hm^(2),emamectin benzoate 5%ME 300 mL/hm^(2),indoxacarb 15%SC 225 mL/hm^(2),chlorantraniliprole 200 g/L SC 225 mL/hm^(2),were used to carry out the field plot efficacy test.The result showed that spinosyn 20%SC was safe to maize and had a good control effect on Spodoptera frugiperda.With the increase of the dosage per hectare,the control effect and duration increased.The control effect of spinosad 225 g/hm^(2)and 300 g/hm^(2)was more prominent,and the control effect was more than 90% after 1-3 days of the first and second times,the control effect was above 75%after 14 days,and the seedling protection effect was still above 80%after 14 days.In addition,21 days after the second dose,the control effect was still over 70%,and the seedling protection effect was more than 60%.The harm index of Spodoptera frugiperda to corn under the two treatments was 13.18-14.30,the harm level was controlled within level 2,and the damage degree of corn occurred lightly.It is recommended to use spinosyn 20%SC for controlling Spodoptera frugiperda of maize,with the dosage of 225 mL/hm^(2).In the corn seedling stage,it can be sprayed once,and in the corn trumpet stage,it can be used to mix sand and spread it once.
作者
谢显彪
孟继枝
沈云峰
尹晓青
王振勇
姜吉维
陈星建
鲁凤书
杨丽萍
赵国安
XIE Xianbiao;MENG Jizhi;SHEN Yunfeng;YIN Xiaoqing;WANG Zhenyong;JIANG Jiwei;CHEN Xingjian;LU Fengshu;YANG Liping;ZHAO Guoan(Plant Protection and Inspection Station of Baoshan,Yunnan province,Baoshan 678000,Yunnan,China;Agri-environmental Protection and Monitoring Station of Baoshan,Yunnan province,Baoshan 678000,Yunnan,China;Science and Technology Information Research Institute of Baoshan,Yunnan province,Baoshan 678000,Yunnan,China)
出处
《农学学报》
2024年第7期18-23,共6页
Journal of Agriculture
基金
国家重点研发计划课题“草地贪夜蛾区域性绿色防控技术集成与示范”(2021YFD1400705)
云南省重大科技专项计划“云南农业跨境重大病虫草害关键防控技术研究与推广”(202102AE090003)。
