ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Avermectin B1a metabolism in celery: a residue study.

Moye, H. A.; Malagodi, M. H.; Yoh, J.; Deyrup, C. L.; Chang, S. M.; Leibee, G. L.; Ku, C. C.; Wislocki, P. G.;

Journal of Agricultural and Food Chemistry Year: 1990 Vol: 38 Issue: 1 Pages: 290-297 Ref: 9 ref.

1990

บทคัดย่อ

In field studies in Florida, radioactivity equivalent to <4% total avermectin B1a [abamectin] applied to mature and immature celery as a mixture of unlabelled and [14C] or [3H] abamectin remained in harvested plants. The half-lives of [3H] abamectin residues in both leaves and stalks of immature and mature celery plants treated at 0.01 lb of a.i./acre were similar (range 5.6-9.0 days), as were those treated at 0.1 lb a.i./acre (4.6-5.8 days). The half-lives for total [3H] abamectin residues in both leaves and stalks were 5.2-9.2 days at 0.01 lb a.i./acre and 6.3-12.9 days at 0.01 lb a.i./acre. The percentage of total radioactivity in celery parts readily extractable with acetone (range of 57.8-97.1%) generally decreased with increasing postharvest intervals. HPLC analysis of acetone extracts from celery leaves and stalks produced 4 discernible peaks of radioactivity, designated as polar metabolites, moderately polar metabolites, abamectin and the delta 8,9 isomer of abamectin. Results suggest that active metabolism and/or a more rapid breakdown of abamectin occurs in leaves rather than stalks.