Scholarlink

<p>The excessive application of pesticides in rice cultivation leads to environmental contamination. In this study, farmers’ use of pesticides in rice fields and pesticide residues in water, soil, and sediment were investigated. The results showed that 23 active ingredients were used in rice cultivation. Among them, six insecticide active ingredients—diazinon, cypermethrin, dimethoate, permethrin, chlorpyrifos ethyl, and fenvalerate—were detected in water, soil, and sediment in rice fields, as well as in canal sediments. In the paddy field, the highest concentrations were observed for cypermethrin on the 60th day, with 31.13 ± 7.87&#xa0;µg/L in water and 284.03 ± 88.26&#xa0;µg/kg (dry weight) in soil. Dimethoate showed the highest concentration in sediment, reaching 254.90 ± 10.71&#xa0;µg/kg (dry weight) on the 60th day after rice seeding. By the 75th day, only diazinon and chlorpyrifos ethyl were detected, while other insecticides had completely dissipated. This study also provides important information on the accumulation of insecticides in rice ecosystems. Chronic risk assessment using the risk quotient (RQ) in water showed that all insecticides posed a high potential ecological risk. In addition, hazard quotient (HQ) values for non-carcinogenic human health risks, calculated from average insecticide concentrations, indicated that dimethoate in paddy field water posed a risk to both children and adults via ingestion. The risk assessment offers insights into the effects of insecticides on human health and ecology, providing scientific guidance for managing pesticide application.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Application, occurrence, degradation and risk assessment of pesticides in rice paddy field: a case study in Vietnam

  • 期刊论文

  • 发表日期：

    2026年7月17日

查看全文
  • Ha Danh Duc,
  • Vo Ho Phong

摘要

The excessive application of pesticides in rice cultivation leads to environmental contamination. In this study, farmers’ use of pesticides in rice fields and pesticide residues in water, soil, and sediment were investigated. The results showed that 23 active ingredients were used in rice cultivation. Among them, six insecticide active ingredients—diazinon, cypermethrin, dimethoate, permethrin, chlorpyrifos ethyl, and fenvalerate—were detected in water, soil, and sediment in rice fields, as well as in canal sediments. In the paddy field, the highest concentrations were observed for cypermethrin on the 60th day, with 31.13 ± 7.87 µg/L in water and 284.03 ± 88.26 µg/kg (dry weight) in soil. Dimethoate showed the highest concentration in sediment, reaching 254.90 ± 10.71 µg/kg (dry weight) on the 60th day after rice seeding. By the 75th day, only diazinon and chlorpyrifos ethyl were detected, while other insecticides had completely dissipated. This study also provides important information on the accumulation of insecticides in rice ecosystems. Chronic risk assessment using the risk quotient (RQ) in water showed that all insecticides posed a high potential ecological risk. In addition, hazard quotient (HQ) values for non-carcinogenic human health risks, calculated from average insecticide concentrations, indicated that dimethoate in paddy field water posed a risk to both children and adults via ingestion. The risk assessment offers insights into the effects of insecticides on human health and ecology, providing scientific guidance for managing pesticide application.