Radiotracer studies on 14C-zineb in cabbage and soil

Abstract

Potted cabbage plants sprayed three times at variable intervals with 14C-zineb/Manzate 200 were exposed to field conditions. At harvest, the total radioactivity decreased in the following order: wrapper leaves > outer leaves > stem > soil > head. Ethylenebisdithiocarbamate (EBDC) residues in the wrapper leaves were below MRL. Radioactivity was not detected in leached water. EBDC residues were not detected in the head, soil or water. Total ethylene thiourea (ETU) residues (2.1 ppm) were found in the outer leaves only. Bound residues in soil, after methanol extraction, did not differ at 81 or 116 days after sampling. Methanol extracted more of the radiocarbon from the soil (51-54%) than Na2 EDTA (8-33%).

Source or Periodical Title

PHILIPP. AGRIC.

Page

139-147

Document Type

Article

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