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采用田间试验的方法,研究了哒螨酮在柑桔及土壤中的残留动态,应用气相色谱法测定了哒螨酮在柑桔和土壤中的残留量。结果表明,哒螨酮在柑桔和土壤中消解较快,其半衰期分别为3.53￣13.50d和3.13￣10.53d;10%苯丁·哒乳油兑水稀释1500倍(哒螨酮浓度为33.3mg·L-1),使用3次,末次施药20d后,哒螨酮在柑桔肉残留量为未检出,在柑桔皮中为未检出￣0.0823mg·kg-1,在土壤中为未检出￣0.0783mg·kg-1。该药属易分解农药(T1/2<30d),按推荐使用剂量使用是安全的。
Field experiments were conducted to study the residue dynamics of pyridaben in citrus and soil. The residues of pyridaben in citrus and soil were determined by gas chromatography. The results showed that pyridaben was quickly digested in citrus and soil with the half-lives of 3.53-13.5d and 3.13-10.53d, respectively. Diclofenac 10% diluted 1500 times with water (the concentration of pyridaben 33.3mg · L-1) was used three times. After the last 20 days, the pyridaben residue in citrus was not detected, and in citrus peel was not detected ~ 0.0823 mg · kg-1, Not detected ~ 0.0783 mg · kg-1. The drug is easy to decompose pesticides (T1 / 2 <30d), according to the recommended dosage is safe to use.