Behavior of pretilachlor and dimethametryn in water of flooded rice fields

Thai Khanh Phong, Katsunori Yoshino, Kazuaki Hiramatsu, Harada Masayoshi, Tsuyoshi Inoue

Research output: Contribution to journalArticle

Abstract

In order to understand the behavior of pretilachlor, a popular rice herbicide in the world, and a synergetic active ingredient, dimethametryn, a monitoring study was conducted in 3 paddy plots in Kyushu region, Japan. The monitoring indicated different behaviors for both pesticides from those reported in the literature. Maximum concentrations of pretilachlor and dimethametryn were 1 order of magnitude lower than the values observed in previous studies. However, the dissipation rates estimated from monitoring data were in agreement with other studies in Japan. The pesticide product was tested and showed good dissolution of pretilachlor and dimethametryn in water, suggesting that another study is needed to explain the low concentrations of the two pesticides in the fields. Besides pesticide behaviors, it was observed from the monitoring that water management in paddy rice cultivation still requires more attention to reduce the environmental risk of rice pesticides.

Original languageEnglish
Pages (from-to)321-326
Number of pages6
JournalJournal of the Faculty of Agriculture, Kyushu University
Volume55
Issue number2
Publication statusPublished - Oct 1 2010

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Agronomy and Crop Science

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