摘要
为了评价螺螨酯在柑橘和土壤中的安全性,建立其在柑橘中的使用规范,于2010、2011年在长沙、杭州进行田间试验,研究螺螨酯在柑橘和土壤中的最终残留和消解动态。结果表明:螺螨酯在柑橘和土壤中的添加回收率为82.2%～110%,相对标准偏差为2.55%～9.84%;螺螨酯在柑橘和土壤中的最低检出限均为0.0035mg/kg。螺螨酯在柑橘和土壤中的消解均符合一级动力学方程,消解半衰期分别为5.18～8.49天,5.19～7.85天。螺螨酯最终残留在橘肉、橘皮和土壤中的质量分数分别是未检出(<0.0035mg/kg),未检出(<0.0035mg/kg)～0.1978mg/kg,未检出(<0.0035mg/kg)～0.2401mg/kg,均低于欧盟规定的在柑橘上的最大残留限量0.5mg/kg。参考欧盟制定的柑橘中螺螨酯的最大残留限量(0.5mg/kg),按推荐施药剂量和次数施用螺螨酯,防治柑橘红蜘蛛,施药后20天以后收获柑橘,食用是安全。
In order to evaluate environmental safety of spirodiclofen in orange and soil,establish the use standard in orange,the field trials on the dissipation and final residue of spirodiclofen were carried out in Changsha,Hangzhou during 2010-2011.The results showed that,the average recoveries of spirodiclofen from orange and soil sample at three spiked levels of 0.05 mg/kg,0.5 mg/kg and 1 mg/kg,ranged from 82.2% to 110% with variation coefficient from 2.55% to 9.84%.Degradation dynamics of spirodiclofen based on first-order reaction dynamic equations in orange and soil,the half-lives of spirodiclofen were 5.18-8.49 days,5.19-7.85 days.The final residue of spirodiclofen in peel,pulp and soil were not detected（0.0035 mg/kg）,not detected（0.0035 mg/kg）-0.1978 mg/kg,not detected（0.0035 mg/kg）-0.2401 mg/kg,lower than the provisions of maximum residue limit of 0.5 mg/kg in EU.According to application dosage and times of spirodiclofen for reference the maximum residue limits（0.5 mg/kg） by EU,orange was safe to eat after spirodiclofen being sprayed after 20 days.
出处
《中国农学通报》
CSCD
2012年第31期271-276,共6页
Chinese Agricultural Science Bulletin
基金
农业部农药残留项目"螺螨酯240g/L在柑橘和土壤中的残留实验"(NR2010P416)
关键词
螺螨酯
柑橘
土壤
消解
残留
spirodiclofen
orange
soil
dissipation dynamics
residue
