喷雾助剂对三唑磷在水稻叶片上沉积量的影响

 【目的】研究在三唑磷喷雾液中添加不同润湿剂及其与增黏剂组合,以及喷药0、1、2、4、8 h后人工模拟降雨对三唑磷在水稻叶片上沉积量的影响。【方法】利用残留分析的气相色谱检测方法测定三唑磷喷雾药液在水稻叶片上的沉积量。【结果】润湿剂中仅6501能提高三唑磷在水稻叶片上的沉积量;润湿剂与增黏剂组合,特别是增加增黏剂的用量,可以显著提高药液在水稻叶片上的沉积量及耐雨水冲刷的能力,最佳助剂组合是质量分数为0.025%的6501与0.02%聚丙烯酸钠,其沉积量高达77.4 μg•g-1,是对照处理的8倍多。【结论】添加合适的助剂在同等药效下可以减少用药量,达到降低用药成本和减少环境污染的目的。

The Influence of Triazophos Deposition on Rice Leaves by Adding Spray Adjuvants

Objective] The influence of triazophos deposition on rice leaves were studied by adding wetting agents and thickener in the dilution of triazophos. As well as simulated rainfall after 0, 1, 2, 4, and 8 h of spraying. Method] By means of pesticide residue analysis method, the deposition of triazophos on rice leaves was detected by GC. Result] The results showed that the combination of the wetting agent and thickener could increase the deposition significantly and resist the erosion of rain. The best combination was 0.025% of adjuvant 6501 and 0.02% of adjuvant PAAS in dilution of triazophos. The deposition of the best combination is 77.4 μg·g~(-1) and it is seven times higher than that of CK treatment. Conclusion] The addition of an appropriate spray adjuvant may decrease the pesticide dosage in equal field control efficacy and can achieve the goal of reducing control cost and environmental pollution.