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[方法]稻瘟灵是我国水稻生产上防治稻瘟病的主要杀菌剂之一。为明确30%稻瘟灵展膜油剂在水稻植株、田水及土壤中的残留与消解动态,分别于2011、2012年在水稻田进行稻瘟病防治试验,并在施药后不同时期采集水稻、田水及土壤样本,通过气谱(配ECD检测器)进行相关样本的药剂残留检测。[结果]2011年,稻瘟灵在水稻植株、田水和土壤中的原始沉积量分别为37.549 0 mg/kg、1.334 6 mg/L和0.130 1 mg/kg,半衰期(t1/2)分别为4.2、5.2、15.6 d;2012年,稻瘟灵在水稻植株、田水和土壤中的原始沉积量分别为26.867 6 mg/kg、0.927 7 mg/L和0.325 4 mg/kg,t1/2分别为4.9、5.0、13.6 d。最终残留试验表明稻瘟灵在糙米、稻壳、稻株和土壤中的最终残留量分别为0.113 0～1.947 4、2.835 6～10.123 6、0.321 7～2.583 7、<0.002～0.124 7 mg/kg。[结论]30%稻瘟灵展膜油剂可以在水稻上使用,但施药剂量最高为540 g/hm2,施药1次,采收间隔期为28 d。
[Method] Rice blast is one of the main fungicides for controlling rice blast in rice production in China. In order to clarify the dynamics of residual and digestion of 30% rice blast filming agent in rice plants, field water and soil, rice blast prevention and control experiments were carried out in paddy fields in 2011 and 2012 respectively, and rice was collected at different periods after spraying , Field water and soil samples, and the related samples were detected by gas chromatography (with ECD detector). [Result] The original deposition rates of rice blast in rice plant, field water and soil were 37.549 0 mg / kg, 1.334 6 mg / L and 0.130 1 mg / kg respectively in 2011, and the half lives (t1 / 2) 4.2, 5.2 and 15.6 d respectively. In 2012, the original deposition rates of rice blast was 26.867 6 mg / kg, 0.927 7 mg / L and 0.325 4 mg / kg in paddy field, field water and soil, respectively 4.9, 5.0, 13.6 d. The final residue test showed that the final residue of rice blast was 0.113 0 ~ 1.947 4,2.835 6 ~ 10.123 6,0.321 7 ~ 2.583 7, <0.002 ~ 0.124 7 mg / kg in brown rice, rice husk, rice plant and soil, respectively . [Conclusion] The 30% rice blast film oiling agent could be used on rice, but the highest dosage was 540 g / hm2, and the spraying time was 1 and the harvest interval was 28 d.