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

文献类型： 外文期刊

作者： Xu, Guangchun 1 ; Yan, Dongdong 1 ; Fang, Wensheng 1 ; Xu, Dejin 3 ; Xu, Lu 3 ; Wang, Qiuxia 1 ; Cao, Aocheng 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Plant Protect, Beijing 100193, Peoples R China

2.China Agr Univ, Coll Sci, Beijing 100193, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing 210014, Peoples R China

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

期刊名称：AGRONOMY-BASEL （ 影响因子：3.7； 五年影响因子：4.0 ）

ISSN：

年卷期： 2024 年 14 卷 3 期

页码：

收录情况： SCI

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/m(2.) 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 (R-2 > 0.9000). The relationship between the permeation (y) and energy difference (Delta gamma) conformed to the polynomial equation y = a Delta gamma(2) + b Delta gamma + 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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