Radiotracer studies on pesticide residues in plants at the national crop protection center, University of the Philippines at Los Banos, Laguna
Abstract
The chemodynamics of 14C-carbosulfan and 14C-isoprocarb in a rice paddy ecosystem was studied. The major metabolite formed from carbosulfan was carbofuran (CF). Residue levels of CF reached a peak at 72 hr after carbosulfan (CS) application. After 72 h, the radioactivity was distributed as follows: soil > water > plant > fish > air. 14C-isoprocarb exhibited systemic activity in rice plants with the greatest concentration in the stems and least in grains. Kangkong (Ipomoea aquatica) plants absorbed and stored isoprocarb better than rice. Radioactivity was also found in T. nilotica fingerlings and snails. 14C-isoprocarb and its metabolites bound in soil were utilized by secondary crops like watermelon at very minimal levels (0.04 to 0.08%). 14C-CS showed systemic activity in tomato seedlings. CF and 3-hydroxy CF were the two major toxic metabolism found. No detectable CS and CF were found in tomato fruit harvested 45 days after last spraying, using the recommended rate and timing of application.
Source or Periodical Title
PHILIPP. AGRIC.
Page
65-75
Document Type
Article
Recommended Citation
Magallona, E. D.; Tejada, A. W.; Calumpang, S. M.F.; and Barredo, M. J.V., "Radiotracer studies on pesticide residues in plants at the national crop protection center, University of the Philippines at Los Banos, Laguna" (2021). Journal Article. 3716.
https://www.ukdr.uplb.edu.ph/journal-articles/3716