数字农科院2.0

Effects of Different Spray Adjuvants on the Permeation of Dinotefuran in Rice Leaves

文献类型： 外文期刊

作者： Guangchun Xu;Dongdong Yan;Wensheng Fang;Dejin Xu;Lu Xu;Qiuxia Wang;Aocheng Cao

作者机构：

关键词： permeation;rice leaf surface;spray adjuvant;surface free energy

期刊名称： Agronomy

ISSN： 2073-4395

年卷期： 2024 年 14 卷 3 期

页码：

收录情况： SCIE（2024版）

摘要： This study investigated the efficacy of three spray adjuvants (Coerce, Wetcit, and Silwet408) in enhancing dinotefuran permeation in rice leaves. Different concentrations of these adjuvants were tested using an external standard method. The rice leaf surface was analyzed by using the van Oss–Chaudhury–Good method to establish a link between surface free energy (SFE) and dinotefuran permeation. All of the adjuvants effectively increased dinotefuran permeation in rice leaves, with the highest permeation of 8.496 mg/kg achieved using Wetcit at 1000 mg/L. The SFE of the rice leaf surface was determined to be 29.28 mJ/m2. A notable correlation was observed between the energy difference (the SFE of the pesticide liquid versus the SFE of the rice leaf surface) and permeation. Various fitting methods, including linear, exponential, logarithmic, polynomial, and power methods, were applied. Polynomial fitting demonstrated the highest coefficient of determination (R2 > 0.9000). The relationship between the permeation (y) and energy difference (Δγ) conformed to the polynomial equation y = aΔγ2 + bΔγ + c, where a, b, and c are constants. This model provides a predictive tool for the optimal dosage of spray adjuvants according to target plant characteristics, enhancing the understanding of the interaction between pests and pesticides.

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