시설재배 아스파라거스 중 살충제 acetamiprid의 잔류특성

Abstract

Abstract This study was carried out to investigate residual characteristics of insecticide acetamiprid inasparagus under greenhouse condition from July to August and consequentially to obtain basic data forguideline on safe use of this pesticide in asparagus. Residues of acetamiprid in young stem of asparagusbefore and after removing foliage were analyzed from samples harvested at 0, 1, 3, 5 and 7 days after singleapplication before harvest. As a result, residues of acetamiprid in young stem of asparagus before and afterremoving foliage at 0 day were 0.27 mg/kg and 0.14 mg/kg, respectively, which were higher than tentativelimit (0.1 mg/kg). However, 3 days later residues of acetamiprid were lower than the tentative limit, representing0.08 mg/kg and 0.03 mg/kg in the asparagus before and after removing foliage, respectively. Acetamiprid wasundetectable in both samples at 5 days since the concentrations were less than detection limit (0.02 mg/kg) inthis study. In summary, the half-life of acetamiprid in asparagus regardless of removing foliage was quiteshort under greenhouse condition from July to August, in the range of 1-3 days, and single application ofacetamiprid water dispersible granule in/on asparagus at 7 days before harvest would have no problem onsafety issues about pesticide residue. This result might be basic information to construct guideline for safeuse of acetamiprid in asparagus.Key words Acetamiprid, Asparagus, Pesticide residues