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为研究不同农药剂型及表面活性剂对药液在亲水和疏水植物叶片表面的持留及铺展行为的影响,通过数码显微镜连续摄像的方法,测试了40种药液液滴在棉花(亲水性)和水稻(疏水性)叶片上的持留及铺展行为。选用5%氯虫苯甲酰胺悬浮剂、25%三唑酮可湿性粉剂和20%三唑酮乳油3种不同剂型的农药,以及Silwet 408、NF100和AgroSpred 730 3种不同表面活性剂,配制不同药液,通过注射器产生液滴并用数码显微镜记录液滴在水稻和棉花叶片上的铺展行为。结果表明:农药剂型对药液表面张力影响不显著,但加入不同表面活性剂却对表面张力影响显著,其对降低表面张力影响的显著程度依次为Silwet 408>AgroSpred 730>NF100;同种表面活性剂对悬浮剂的影响最大,其次是可湿性粉剂,对乳油的影响最小;加入NF100可增加药液液滴在水稻叶片上的持留能力。结合表面张力结果,证明表面张力并非增强药液持留和铺展能力的唯一因素。
In order to study the effect of different pesticide formulations and surfactants on the retention and spreading behavior of the liquid on the surface of hydrophilic and hydrophobic plant leaves, 40 liquid drops were tested in cotton (hydrophilic ) And rice (hydrophobic) leaves on the retention and spreading behavior. Three kinds of pesticides such as 5% chloramphenicol suspension, 25% triadimefon and 20% triadimefon were used, and three different surfactants, Silwet 408, NF100 and AgroSpred 730, were formulated in different formulations Liquids were generated by a syringe and the spread of the droplets on rice and cotton leaves was recorded with a digital microscope. The results showed that the pesticide formulations had no significant effect on the surface tension of the solution, but the addition of different surfactants had a significant effect on the surface tension, and the order of their effect on reducing the surface tension was Silwet 408> AgroSpred 730> NF100; The agent has the greatest influence on the suspending agent, followed by the wettable powder, which has the least effect on the EC. Adding NF100 can increase the retention ability of liquid droplets on the rice leaves. Combined with surface tension results, surface tension is not the only factor that enhances liquid retention and spreading.