【摘要】 于2000～2001年采用固相萃取技术对烟草及土壤中"乐牙"18%水剂的残留进行了试验。结果表明,"乐牙"在烟草中的残留量较高。在烟叶消解动态试验中,前期消解较快,半衰期为2.37～3.35d,但后期消解较慢,45d时才消解到90%以上。土壤中的消解情况与烟叶相反,前期消解较慢,后期消解加快。土壤中半衰期为5.72～5.99d,施药后30d的消解率在95%以上。在最终残留试验中,2000年和2001年施药后30d的残留量分别为90.6mg/kg和82.4mg/kg。在原药用量1mL/株的条件下,"乐牙"18%水剂施药后的安全间隔期为30d。更多还原

【Abstract】 The experiments on residues of 18% Royal in tobacco and soil were conducted with solid phase extract analysis method. The results showed that the residue in tobacco leaves was higher. The dynamic degradation experiment of tobacco leaves indicated that Royal decomposed faster in prophase and slower in anaphase, the half life of Royal in leaves was 2.37-3.35 days, the decomposing rate was above 90% in 45 days after application. On the contrary, Royal in soil decomposed slowly in prophase and fast in anaphase in soil, the half life was 5.72-5.99 days, the decomposing rate was over 95% in 30 days after application. The final residue experiment results showed that the residue was 90.6mg/kg in 2000 and 82.4 mg/kg in 2001 in 30 days after application. It was suggested that the safe alternation of Royal application was 30 days at the rate of 1 mL a.i/plant.更多还原