24-表油菜素内酯对韭菜中腐霉利残留降解的影响

Effects of 24-epibrassnolide on degradation of procymidone residue in Chinese chives

[目的]明确24-表油菜素内酯(EBR)对韭菜中腐霉利残留降解的影响。[方法]开展了2种质量浓度EBR处理影响韭菜中腐霉利残留降解的田间试验。[结果]在施药后的第14天,清水处理的韭菜腐霉利降解率为76.93%,半衰期为7.1 d;0.05 mg/L EBR处理的降解率为80.78%,半衰期为7.5 d;0.1 mg/L EBR处理的腐霉利降解率为91.03%,半衰期为4.8 d。在第28天,清水处理的韭菜腐霉利降解率为90.69%,半衰期为10.1 d;0.05 mg/L EBR处理的降解率为95.25%,半衰期为8.3 d;0.1 mg/L EBR处理的腐霉利降解率为90.88%,半衰期为11.0 d。[结论]0.1 mg/L 24-表油菜素内酯可以作为韭菜腐霉利残留促进降解的速效药剂。

[Aims]The aim of this study is to explore the effects of 24-epibrassnolide(EBR)on degradation of procymidone residue in Chinese chives.[Methods]A field trial with treatments of two concentration of EBR was conducted to study the residual regularity of procymidone in Chinese chives.[Results]On the 14th day after application,the degradation rate of procymidone in Chinese chives treated with water was 76.93%with a half-life of 7.1 d,while those of treatments with 0.05 and 0.1 mg/L EBR were 80.78%and 91.03%,with half-lives of 7.5 and 4.8 d.On the 28th day after application,the degradation rate of procymidone in Chinese chives treated with water was 90.69%with a half-life of 10.1 d,while those of treatments with 0.05 and 0.1 mg/L EBR were 95.25%and 90.6%,with half-lives of 8.3 and 11.2 d.[Conclusions]The 0.1 mg/L of 24-epibrassnolide can stimulate procymidone residuetodegraderapidly in Chinese chives.