有机硅助剂对7种杀虫剂在剑麻叶上润湿性能的影响  

Effect of Organosilicone Adjuvant on Wettability of 7 Insecticides on Sisal Leaves

作　　者：刘志军 辜柳霜 闫超[2] 冯岗[2] 贺春萍[2] 吴伟怀[2] 曾鑫年[1] 易克贤[2,3] LIU Zhijun;GU Liushuang;YAN Chao;FENG Gang;HE Chunping;WU Weihuai;ZENG Xinnian;YI Kexian(College of Plant Protection,South China Agricultural University,Guangzhou 510642;Environmental and Plant Protection Institute,Chinese Academy of Tropical Agriculture Sciences,Haikou 570100;Key Laboratory for Integrated Pest Management of Tropical Crops,Ministry of Agriculture and Rural Affairs,Haikou 570100)

机构地区：[1]华南农业大学植物保护学院,广州510642 [2]中国热带农业科学院环境与植物保护研究所,海口570100 [3]农业农村部热带作物有害生物综合治理重点实验室,海口570100

出　　处：《中国农学通报》2023年第1期112-116,共5页Chinese Agricultural Science Bulletin

基　　金：国家现代农业产业技术体系剑麻生理与栽培岗位(CARS-16-E16);2019年海南省基础与应用基础研究计划(自然科学领域)高层次人才项目“剑麻紫色卷叶病相关植原体特异性检测技术及其致病性研究”(2019RC282);国家重点研发项目“特色经济作物化肥农药减施技术集成研究与示范”(2018YFD0201100)。

摘　　要：研究农田常用的杀介壳虫药剂在剑麻叶片上的润湿性能,并通过添加适量的有机硅助剂提高杀虫剂的使用效率。采用Zisman作图法测定剑麻的临界表面张力,并与推荐剂量下7种杀虫剂药液的表面张力值,及添加不同浓度有机硅助剂后药液的表面张力值进行比较分析。结果表明,剑麻的临界表面张力值为23.89 mN/m,7种杀虫剂的表面张力值为35.72~72.51 mN/m,均大于剑麻的临界表面张力,药液在剑麻叶上润湿性较差。有机硅助剂能够降低药液的表面张力,当45%毒死蜱EC 450 mg/L中加入有机硅500 mg/L,4.5%高效氯氰菊酯EC 45 mg/L和70%吡虫啉WG 350 mg/L中加入有机硅200 mg/L,其余4种杀虫剂中添加有机硅100 mg/L时,药液的表面张力降至剑麻的临界表面张力以下,药液的润湿性能得以提升。因此,在麻田害虫防治上,建议在农药制剂中添加适量的有机硅助剂来改善药液在叶片上的润湿性能,进而提高农药的利用率。The paper aims to study the wettability of scalecide solution commonly used in farmland on sisal leaves,and choose suitable adjuvants to improve the utilization of insecticides.The critical surface tension of sisal leaf was determined by Zisman method,and compared with the surface tension values of 7 insecticides at the recommended dosage,and the surface tension values after adding different concentrations of organosilicone adjuvant.The critical surface tension of sisal leaf was 23.89 mN/m.The surface tension of the 7 insecticides ranged from 35.72 to 72.51 mN/m,which were all higher than the critical surface tension of sisal leaf,and the wettability of the solutions was poor.Organosilicone adjuvants could reduce the surface tension of the insecticides.By adding 500 mg/L silicone to 45%chlorpyrifos EC 450 mg/L,200 mg/L silicone to 4.5%betacypermethrin EC 45 mg/L and to 70%imidacloprid WG 350 mg/L,and 100 mg/L silicone to the other four insecticides,the surface tension of the solutions was lower than the critical surface tension of sisal leaf and the wetting effect of the solutions was good.Therefore,the adjustment and addition of adjuvants can improve the effect and the utilization rate of pesticides in the process of sisal disease and pest control.

关 键 词：有机硅助剂 杀虫剂 剑麻叶片 润湿性 表面张力 临界表面张力 

分 类 号：S482.92[农业科学—农药学]