6种喷雾助剂对3种药剂表面张力与接触角的影响

为达到农药减施增效的目的,将6种喷雾助剂(强力源、柔水通、有机硅、阿普顿、怀农特、倍创)与3种药剂(70%吡虫啉水分散粒剂、5%阿维菌素乳油、1.3%苦参碱水剂)混配,测定混配后药液的表面张力和接触角变化,分析药液表面张力和接触角的关系。结果表明,添加不同质量浓度的6种喷雾助剂均能降低药液的表面张力,其中,有机硅、强力源、怀农特降低3种药剂表面张力的效果最好,柔水通、阿普顿次之,倍创效果最差。有机硅、柔水通、强力源、怀农特降低3种药剂接触角的效果最好,阿普顿次之,倍创效果最差。分析了3种药剂在添加不同质量浓度的6种喷雾助剂后药液的表面张力与接触角余弦值的关系,结果显示,二者呈显著(P<0.05)负相关关系。综上,合理选用喷雾助剂有助于提高农药的利用率。研究结果可为田间施药和进一步研发喷雾助剂提供数据支持。

Effect of 6 kinds of spray adjuvant on surface tension and contact angle of 3 kinds of pesticides

In order to reduce pesticide application and increase efficiency, 6 kinds of spary adjuvant (Qiangliyuan, Roushuitong, Organosilicone, Apudun, Huainongte, Beichuang), and 3 kinds of pesticides (70% imidacloprid WG, 5% abamectin EC, 1.3% matrine AS) were mixed respectively. The changes of the surface tension and contact angle of these mixtures were measured, and the relationship between the surface tension and the contact angle of these mixtures was analyzed. It was shown that addition of 6 kinds of spray adjuvant could reduce the surface tension under different concentrations. The reduction effect on surface tension of the 3 kinds of pesticides was the highest by adding Organosilicone, Qiangliyuan and Huainongte, which was followed by Roushuitong and Apudun, and the worst effect was found by adding Beichuang. For the reduction effect on the contact angle of the 3 kinds of pesticides, it was the highest by adding Organosilicone, Roushuitong, Qiangliyuan and Huainongte, which was followed by Apudun, and the worst effect was found by adding Beichuang. The relationship between the surface tension and the contact angle of the 3 kinds of pesticides was analyzed. The regression results showed that there was a significant (P<0.05) negative correlation between the surface tension and the cosine value of the contact angle. The rational application of spary adjuvant could benefit the utilization of pesticides. The present results could provide data support for field application and further research on adjuvant.