噻虫嗪与螺虫乙酯混用对柑橘矢尖蚧和全爪螨的田间防治效果  

Control Efficacy of Thiamethoxam Mixed with Spirotetramat Against Arrowhead Scale and Citrus Red Mite Under Field Conditions

作　　者：赵明平 王相琴 王培[2] 符伟[2] 唐涛[2] ZHAO Ming-ping;WANG Xiang-qin;WANG Pei;FU Wei;TANG Tao(Bureau of Agriculture and Rural Affairs of Jianghua Yao Autonomous County,Yongzhou 425500,PRC;Hunan Institute of Plant Protection,Hunan Academy of Agricultural Sciences,Changsha 410125,PRC)

机构地区：[1]江华瑶族自治县农业农村局,湖南永州425500 [2]湖南省农业科学院植物保护研究所,湖南长沙410125

出　　处：《湖南农业科学》2023年第7期73-76,81,共5页Hunan Agricultural Sciences

基　　金：湖南省重点研发计划(2022NK2052);湖南省农业科技创新资金(2022CX66)。

摘　　要：为了筛选出能有效控制柑橘矢尖蚧和全爪螨的二元复配剂,采用田间小区试验研究了40%噻虫嗪·螺虫乙酯SC与其相应的2种单剂(21%噻虫嗪SC和22.4%螺虫乙酯SC)、生产上常用的100 g/L联苯菊酯EC和15%唑虫酰胺SC对柑橘矢尖蚧和全爪螨的防治效果。结果表明:40%噻虫嗪·螺虫乙酯SC对柑橘矢尖蚧的防治效果好,兼治柑橘全爪螨且持效期长,药后7~30 d对矢尖蚧的防治效果为92.44%~98.02%,药后3~30 d对全爪螨的防治效果为60.57%~84.86%;22.4%螺虫乙酯SC60 mg/kg对柑橘矢尖蚧和全爪螨高效,药后7~30 d对矢尖蚧的防治效果为85.45%~91.37%,药后3~30 d对全爪螨的防治效果为78.56%~95.12%;21%噻虫嗪SC 60 mg/kg和15%唑虫酰胺SC 50 mg/kg对柑橘矢尖蚧的防治效果一般而对全爪螨的防治效果较差,药后7~30 d对矢尖蚧的防治效果分别为62.73%~79.52%和49.90%~75.97%,药后3~30 d对全爪螨的防治效果分别为16.46%~53.09%和29.95%~70.11%;100 g/L联苯菊酯SC 30 mg/kg对矢尖蚧有一定效果、对全爪螨的效果较好,药后7~30 d对矢尖蚧的防治效果为23.35%~62.95%,药后3~30 d对全爪螨的防治效果为74.19%~88.74%。因此,在柑橘生产实践中,当矢尖蚧发生达到防治指标而全爪螨发生较轻时,只需喷施1次40%噻虫嗪·螺虫乙酯SC 80 mg/kg;若矢尖蚧和全爪螨发生均达到防治指标时,还应喷施1次22.4%螺虫乙酯SC 60 mg/kg。Field plot experiments were conducted to evaluate control efficacy of thiamethoxam·spirotetramat 40% SC,thiamethoxam 21%SC,spirotetramat 22.4% SC,bifenthrin 100 g/L EC and tolfenpyrad 15% SC against arrowhead scale(Unaspis yanonensis) and citrus red mite(Panonychus citri) in 2021-2022.The results showed that thiamethoxam·spirotetramat 40% SC at a rate of 80 mg/kg could effectively control U.yanonensis and was also efficient to P.citri with a long duration;its control efficacy against U.yanonensis was 92.44%-98.02%,7-30 days after treatment(DAT),and against P.citri was 60.57%-84.86%,3-30 DAT.Spirotetramat 22.4% SC at a rate of 60 mg/kg was efficient for controlling the two pests,its control efficacy against U.yanonensis was 85.45%-91.37%,7-30 DAT,and against P.citri was 78.56%-95.12%,3-30 DAT.To a certain extent,60 mg/kg of thiamethoxam 21% SC or 50 mg/kg of tolfenpyrad 15% SC could controll U.yanonensis,but was difficult for P.citri;the control efficacy of these two insecticides against U.yanonensis was 62.73%-79.52% and 49.90%-75.97%,respectively,7-30 DAT,and against P.citri was 16.46%-53.09% and 29.95%-70.11%,respectively,3-30 DAT.Bifenthrin 100 g/L EC at a rate of 30 mg/kg had a certain efficacy against U.yanonensis,while was efficient for P.citri;its control efficacy against U.yanonensis was 23.35%-62.95%,7-30 DAT,and against P.citri was 74.19%-88.74%,3-30 DAT.Therefore,these results suggest that a single foliar spray of thiamethoxam·spirotetramat 40% SC at the rate of 80 mg/kg is necessary if U.yanonensis achieves control indexes,while P.citri slightly infests.If both U.yanonensis and P.citri achieve control indexes,one-time supplementary application of spirotetramat 22.4% SC at the rate of 60 mg/kg is needed.

关 键 词：柑橘 矢尖蚧 全爪螨 螺虫乙酯 噻虫嗪 防治效果 

分 类 号：S436.66[农业科学—农业昆虫与害虫防治]