Swarcewicz Maria K, Gregorczyk Andrzej
Institute of Organic Chemical Technology, Department of Organic Synthesis and Drug Technology, West Pomeranian University of Technology, Szczecin, Poland.
Pest Manag Sci. 2013 Dec;69(12):1346-50. doi: 10.1002/ps.3510. Epub 2013 Apr 2.
There are few reports on the effects of spray adjuvants on pesticide persistence. The role of three adjuvants used with atrazine on the herbicide's degradation in soil was examined. Three mathematical models were used to describe pesticide disappearance from soil: pseudo-first-order kinetics, the non-linear Gustafson-Holden model and the biexponential function.
A mixture of atrazine with Atpolan 80 EC significantly inhibited herbicide soil degradation (DT50 = 78 days), while Adpros 85 SL and Break-Thru S 240 (DT50 = 25 and 24 days respectively) had little effect (DT50 = 22 days, atrazine alone). These results suggest that adjuvant can be a factor in field persistence. DT50 values obtained using the Gustafson-Holden and biexponential models were similar. Only the biexponential model requires an iterative method.
A significant effect of one adjuvant on atrazine persistence in soil was observed. The biexponential model best described the disappearance of atrazine in the soil, as indicated by the values of R(2) and RMS and the relative concentration of the herbicide in the soil.
关于喷雾助剂对农药持久性影响的报道较少。研究了与莠去津一起使用的三种助剂对除草剂在土壤中降解的作用。使用了三种数学模型来描述农药从土壤中的消失情况：伪一级动力学、非线性古斯塔夫森 - 霍尔登模型和双指数函数。
莠去津与Atpolan 80 EC的混合物显著抑制了除草剂在土壤中的降解（DT50 = 78天），而Adpros 85 SL和Break - Thru S 240（分别为DT50 = 25天和24天）影响较小（单独莠去津的DT50 = 22天）。这些结果表明助剂可能是影响田间持久性的一个因素。使用古斯塔夫森 - 霍尔登模型和双指数模型获得的DT50值相似。只有双指数模型需要迭代方法。
观察到一种助剂对莠去津在土壤中的持久性有显著影响。双指数模型最能描述莠去津在土壤中的消失情况，这通过R(2)值、RMS值以及土壤中除草剂的相对浓度得以体现。
