氯虫苯甲酰胺与杀虫单复配处理水稻种子对稻纵卷叶螟的防效及持效机理  

Control efficacy and long-term mechanism of chlorantraniliprole and monosultap co-treatment on rice seeds against Cnaphalocrocis medinalis

作　　者：于居龙[1] 张国 张新凤 朱阿秀 张海波 万群[3] 程金金[3] 张建华[1] 姚克兵[1] 束兆林[1] YU Julong;ZHANG Guo;ZHANG Xinfeng;ZHU Axiu;ZHANG Haibo;WAN Qun;CHENG Jinjin;ZHANG Jianhua;YAO Kebing;SHU Zhaolin(Zhenjiang Institute of Agricultural Science in Hilly Area of Jiangsu Province,Jurong 212400,Jiangsu Province,China;Jiangsu Plant Protection and Quarantine Station,Nanjing 210036,China;Institute of Agricultural Resources and Environment,Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China)

机构地区：[1]江苏丘陵地区镇江农业科学研究所,江苏句容212400 [2]江苏省植物保护植物检疫站,南京210036 [3]江苏省农业科学院农业资源与环境研究所,南京210014

出　　处：《农药学学报》2024年第1期114-122,共9页Chinese Journal of Pesticide Science

基　　金：江苏省农业科技自主创新资金项目[CX(22)3013];镇江市重点研发计划-现代农业项目(NY2021010);江苏省碳达峰碳中和科技创新项目(BE2022424)。

摘　　要：稻纵卷叶螟Cnaphalocrocis medinalis是水稻生产上重要的迁飞性害虫,为开发出适用于种子处理且可长效防控稻纵卷叶螟的复配药剂,通过室内内吸活性测定、田间防效验证及植株中药剂含量检测,研究了氯虫苯甲酰胺和杀虫单复配的最适比例及对稻纵卷叶螟的田间防治效果,初步明确了复配剂的持效机理。内吸活性测定结果表明,氯虫苯甲酰胺和杀虫单质量浓度比为2:3时,共毒系数最高,内吸能力最强。按照该配比制备的25%氯虫·杀虫单种子处理悬浮剂(FS,分别含10%氯虫苯甲酰胺和15%杀虫单)在7.5~15 g/kg (种子,以下同)剂量范围内进行拌种处理,对水稻发芽和出苗安全。田间试验表明,采用25%氯虫·杀虫单FS按7.5~15 g/kg剂量拌种处理,对田间稻纵卷叶螟具有较好的控制作用,且持效期长,播种后94 d仍有70%左右的保叶效果。植株中药剂含量检测结果表明,25%氯虫·杀虫单FS对稻纵卷叶螟的持效控害能力主要与叶片中氯虫苯甲酰胺的残留含量有关,复配剂中的杀虫单虽然降解较快,但其在苗期可提高水稻根部对氯虫苯甲酰胺的吸收率。本研究结果可为开发防治稻纵卷叶螟的种子处理药剂提供理论依据及技术参考。Cnaphalocrocis medinalis is an important migratory pest in rice production.In order to develop a compound pesticide suitable for seed treatment and effective long-term control of C.medinalis,the optimal ratio of chlorantraniliprole and monosultap,as well as the field control effect,was studied through indoor systematic action test,field effect verification,and pesticide residue detection in rice plant.The long-term prevention and control mechanism of the compound agent had been preliminarily clarified.The results from the systematic action test indicated that the highest cotoxicity coefficient and strongest systemic absorption occurred when the mass concentration ratio of chlorantraniliprole and monosultap was 2﹕3.The chlorantraniliprole+monosultap 25%seed treatment suspension concentrate(FS),including 10%chlorothalonil and 15%benzamide,was prepared at doses ranging from 7.5-15 g/kg(seeds).This formulation is safe for seed germination and seedling emergence.The field experiment showed that the application of chlorantraniliprole+monosultap 25%FS at 7.5-15 g/kg(seeds)significantly controlled C.medinalis in the rice field,maintaining effective leaf preservation for an extended period.Even after 94 days post-seeding,approximately 70%leaf protection effect was observed.The detection of pesticide content in rice plant showed that the sustained control capability of chlorantraniliprole+monosultap 25%FS against C.medinalis was primarily associated with the chlorantraniliprole content in the leaves.Although monosultap in the compound formulation degraded relatively quickly,its presence enhanced the absorption rate of chlorantraniliprole by rice roots during the seedling stage.This study can provide a theoretical basis and technical reference for the development the seed treatment agents for the control C.medinalis.

关 键 词：氯虫苯甲酰胺 杀虫单 复配增效 稻纵卷叶螟 防治效果 残留动态 

分 类 号：S482.3[农业科学—农药学] S351.1[农业科学—植物保护]