不同套袋方式下丙环唑在香蕉上的降解动态研究

Degradation Dynamics of Propiconazole in Banana with Different Bagging Ways

对比了4种不同套袋方式下丙环唑在香蕉上的残留降解情况。按推荐施药剂量1.5倍施用1次,不同时间间隔多次采样并测定丙环唑残留量。套袋方式下施药,丙环唑无初始沉积量;不套袋方式下施药,施药后也不套袋,丙环唑的降解半衰期是12.7d,施药后套袋,丙环唑的降解半衰期是17.1d。香蕉套袋可以有效阻挡农药在蕉果上的附着,从而降低丙环唑在香蕉上的残留量。

The residues and degradation of propiconazole in banana with 4 different bagging ways were investigated. The ba- nana samples were collected with different pre-harvest interval after spraying at 1.5 times of recommended dosage. The initial deposition of propiconazole on samples with bags was not detected. The half-life of propiconazole on samples without bags during the whole growing period was 12.7 days while it was 17.1 days in samples bagging after spraying. The bagging ways could protect the banana fruit from adhering of pesticides and reducing the terminal residues of propiconazole.