10%香芹酚·霜霉威水乳剂的研制及其性能  

Preparation and Performance of Carvacrol·Propamocarb 10% Emulsion in Water

作　　者：张星 陈伟 李超楠 王娅[1] 王婷 周倩[1] 李晓刚[1] ZHANG Xing;CHEN Wei;LI Chao-nan;WANG Ya;WANG Ting;ZHOU Qian;LI Xiao-gang(College of Plant Protection,Hunan Agricultural University,Changsha 410128,China)

机构地区：[1]湖南农业大学植物保护学院,长沙410128

出　　处：《农药》2021年第2期101-106,共6页Agrochemicals

基　　金：化学肥料和农药减施增效综合技术研发专项(2016YFD0201200);马铃薯化肥农药减施技术集成研究与示范(2018YFD020080409)。

摘　　要：[目的]为了开发防控马铃薯晚疫病的新药剂,实现化学农药的减量增效,以植物提取物香芹酚与化学农药霜霉威复配采用转相法制备水乳剂。[方法]采用菌丝生长速率法分别测定香芹酚、霜霉威以及不同配比对马铃薯晚疫病菌的生物活性,通过Wadley方法评价不同配比的增效作用,筛选最佳质量比。筛选了关键的溶剂和乳化剂组合,确定了最佳配方,测定了该制剂的质量指标,并进行了盆栽试验。[结果]香芹酚、霜霉威对马铃薯晚疫病菌的EC50值分别为16.1552、0.8353 mg/L,香芹酚与霜霉威在质量比为30:1时,SR最大为1.393 05,判断为相加作用,其EC50值为7.2864 mg/L。10%香芹酚·霜霉威水乳剂的最佳配方:香芹酚与霜霉威为10%,质量比为30∶1,乙酸仲丁酯为10%,D935为4%,SK-33SC为4%,纯水补足100%。该水乳剂分散性优,其乳液稳定性、热贮稳定性和低温稳定性均合格,1 min泡沫体积为8 mL,倾倒后残余物为0.9%、洗涤后残余物为0.257%,持久起泡性与倾倒性都符合标准。pH值为7.90,表面张力为28.0 mN/m,热贮前的体积平均粒径为1.153μm,热贮后的体积平均粒径为1.399μm,对马铃薯晚疫病的防治效果为71.49%。[结论]将植物提取物与化学农药复配,为开发防控马铃薯晚疫病新药剂提供新的思路。[Aims] This study aims to develop new agents for the prevention and control of potato late blight and to reduce the amount and increase the efficacy, this paper prepared water emulsion by phase transfer method with plant extract carvacrol and chemical pesticide propamocarb. [Methods] The mycelial growth rate method was used to determine the virulence of carvacrol, propamocarb and different ratios to Phytophthora infestans, and the Wadley method was used to evaluate the synergistic effects of different ratios to screen out the best quality ratio. The key combination of solvent and emulsifier was screened, the best formula was determined, and the quality index of the preparation was determined, a pot experiment was conducted. [Results] The EC50 of carvacrol and propamocarb to Phytophthora infestans of potato are 16.1552 and 0.8353 mg/L, respectively. When the mass ratio of carvacrol and propamocarb is 30∶1, the maximum SR is 1.393 05, which is judged to be additive action, its EC50 is 7.2864 mg/L. The best formula of carvacrol·ropamocarb 10% water emulsion is: carvacrol and propamocarb 10%, mass ratio 30:1,sec-butyl acetate 10%, D935 4%, SK-33 SC 4%, pure water makes up 100%. The water emulsion is excellent in dispersibility, and its emulsion stability, thermal storage stability and low temperature stability are all qualified. The persistent foaming is 8 m L, the residue after dumping is 0.9%, and the residue after washing is 0.257%, the pH of the water emulsion is 7.90, the surface tension of EW was 28.0 m N/m, the volume average particle size before heat storage is 1.153 μm, and the volume average particle size after heat storage is 1.399 μm, the control effect of potato late blight was 71.49%. [Conclusions] In this study, plant extracts and chemical pesticides were compounded to provide new ideas for the development of new agents for the prevention and control of potato late blight.

关 键 词：香芹酚 霜霉威 乙酸仲丁酯 马铃薯晚疫病菌 水乳剂 

分 类 号：TQ450.6[化学工程—农药化工]