【摘要】 为提高农药对辣椒病害的防效并减少农药用量,采用躺滴法研究辣椒常用农药药液和表面活性剂在辣椒叶面的润湿能力。结果表明:添加浓度为1%时,橙皮精油、施普润、云展、倍达通、迈道和高分子助剂G1801等6种农药助剂临界表面张力为20.39～35.82 mN/m;橙皮精油、云展与辣椒叶片的接触角<35.56°,其余助剂的接触角>55°;常规喷雾下烯酰吗啉、苯醚甲环唑、吡唑醚菌酯、宁南霉素和芸苔素内酯等药液的表面张力为47.41～58.16mN/m,在辣椒叶面上的接触角为53.68°～72.66°,润湿效果较差;添加云展和橙皮精油后对辣椒炭疽病、疫病具有良好的防治效果,添加云展的防治效果为93.56%,添加橙皮精油的防治效果为95.56%～97.47%,二者间无显著差异。生产上防治辣椒病害可以添加1%的橙皮精油。更多还原

【Abstract】 To improve the control effect of pesticides on pepper diseases and reduce the pesticide dosage,the wettability of conventional pesticide solution and surfactant on pepper leaf surface was studied by using sessile drop method.Results:The critical surface tension of six pesticide surfactants(cpjy,spr,yz,bdt,mt and G1801)ranged in 20.39-35.82 mN/m.The contact angle of cpjy and yz to pepper leaf was less than 35.56°,while the contact angle of spr,bdt,mt and G1801 to pepper leaf was over 55°.The surface tension of Dimethomorph,Difenoconazole,Pyraclostrobin,Ningnanmycin and Brassinolide under conventional spray treatment ranged in 47.41-58.16 mN/m and the contact angle to pepper leaf surface ranged in 53.68°-72.66°,which indicated that the wettability of Dimethomorph,Difenoconazole,Pyraclostrobin,Ningnanmycin and Brassinolide on pepper leaf surface was poor.The control efficiency of pesticide added with yz and cpjy against pepper anthracnose and pepper blight was 93.56%and 95.56%-97.47% with no significant difference.Pesticide added with 1% cpjy could be applied to control pepper disease in production.更多还原