歼灭10%乳油在棉花上残留动态研究

Residue Dynamics of 10% Beta-cypermethrin EC in Cotton

对10%乳油在棉花及土壤中残留动态进行了测定,结果表明,10%歼灭乳油在棉花植株中半衰期为3～4d,16～18d可降解对结到95%以上;在土壤中半衰期为8～14d,经过37～60d可降解到95%以上。棉籽中未检出歼灭残留,低于FAO/WHO规定的最高残留限量。

AGC method was carried out to examine residual dynamics of 10% beta-cypermethrin EC in cotton and soil. The results showed that the half-lives of 10% beta-cypermethrin EC in cotton and soils were 3～4 d and 8～14 d respectively; beta-cypermethrin EC degraded above 95% after 16～18 d in cotton and after 37～60 d in soil. The pesticide residues were not found in cotton seeds, which is much lower than MRL of FAO and WHO.