吉林农业大学学报2024，Vol.46Issue(6)：956-961,6.DOI:10.13327/j.jjlau.2020.5837
4种喷雾助剂对25%噻虫嗪水分散粒剂在豇豆叶片表面润湿性能的影响
Effects of Four Spray Adjuvants on Wettability of 25%Thiameth-oxam WG on Cowpea Leaves
摘要
Abstract
The study is to screen pesticide spray adjuvants suitable for cowpeas and to get a better wettability and spreading effect on the surface of crops.The structure of the adaxial and abaxial surface of cowpea leaves were observed by scanning electron microscope,the critical surface ten-sion(CST)and surface free energy of cowpea leaves were calculated.The surface tension,the static contact angle and dynamic contact angle of three different concentrations of 25%thiamethoxam WG with four spray adjuvants were measured.The results showed that the surface tension of di-luted solution of 25%thiamethoxam WG was higher than the critical surface tension of cowpea leaves.The surface tension of 1 250-fold dilution of 25%thiamethoxam WG with adjuvant 0.4%silwet stik and 0.5%Maifei on cowpea leaf was 24.58 mN/m and 31.07 mN/m,respectively,while the CST of cowpea leaf was 32.31 mN/m.When adjuvant 0.5%Maifei was applied to 1 250-fold di-lution of 25%thiamethoxam WG,the dynamic contact angle declined faster than other three adju-vants,and the contact angle turned to 39.68° after 60 s.Better performance could be achieved when 25%thiamethoxam WG's 1 250-fold dilution with 0.5%adjuvant Maifei was applied to cow-pea leaves.关键词
助剂/噻虫嗪/水分散粒剂/豇豆/润湿性/表面自由能/表面张力Key words
adjuvant/thiamethoxam/water dispersible granule/cowpea/wettability/surface free energy/surface tension分类
农业科技引用本文复制引用
王潇楠,王思威,刘艳萍,孙海滨..4种喷雾助剂对25%噻虫嗪水分散粒剂在豇豆叶片表面润湿性能的影响[J].吉林农业大学学报,2024,46(6):956-961,6.基金项目
国家重点研发计划项目(2017YFD020030504),广东省农业科学院科技创新战略专项资金青年导师制项目(R2018QD-065) （2017YFD020030504）
