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- Title
农药水解半衰期的 pH 值敏感性评价.
- Authors
李辉; 胡文兰; 张志恒
- Abstract
In order to quantify the influence of environmental pH value changes on pesticide half-life, a pH value sensibility index evaluation method was established based on pesticides half-life data under different environmental pH values. The sensibility was divided into seven grades including 3A, 2A, 1A, 0, 1B, 2B and 3B according to the index. The results of the evaluation of the hydrolysis half-life of 305 pesticides showed that the pH value sensibility index ranged from -1.67 to 3.31, the average was 0.50, and the average of absolute value for index was 0.60. The pH value sensibility index of the hydrolysis half-life of most pesticides was positive, which will promote hydrolysis when the pH value increased in the environment. Carbamate, diphenyl ethers and aryloxyphenoxypropionate herbicides, carbamate and pyrethroid insecticides, dicarboximidies and benzimidazole fungicides were particularly significant. However, triazine and sulfonylurea herbicides were unique and had a tendency to accelerate hydrolysis when the pH value decreased. The pH value sensibility index of pesticide half-life can directly reflect the influence degree of environmental pH value change on pesticide half-life.
- Publication
Acta Agriculturae Zhejiangensis, 2023, Vol 35, Issue 9, p2130
- ISSN
1004-1524
- Publication type
Article
- DOI
10.3969/j.issn.1004-1524.20221205