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Carazo, E.* ; Constenla, M.A.* ; Fuentes, G.* ; Moza, P.N.

Studies of methamidophos-C-14 in Costa Rican vegetables and soils.

Chemosphere 13, 939-946 (1984)
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Open Access Gold as soon as Publ. Version/Full Text is submitted to ZB.
In order to see the effect of time lapse between the last application of methamidophos and harvesting insecticide was applied on lettuce plants (6,84 μCi in one experiment and 4,03 μCi in the other experiment). Analysis of the crops harvested 3 days after last application showed 9,7 ppm residues on leaves, while crops harvested 1 day after application showed residues of 12,7 ppm (25% more). Treatment of tomato plants (39,65 μCi, 1,01 kg/ha) gave residues in fruits 4,92 ppm after 8 days interval between last application and harvesting. 40 days gap between the last application and harvesting leaved residues of 0,7 ppm in fruits which is much less as recommended by FAO/WHO (1 - 2 ppm). Degradation of this insecticide is dependent on the matrix of the soil, this breakdown is observed in the first ten days and than after it remains constant. C-14 radioactivity extracted from soil and plant analysis was methamidophos (92%).
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Publication type Article: Journal article
Document type Scientific Article
Language english
Publication Year 1984
HGF-reported in Year 0
ISSN (print) / ISBN 0045-6535
e-ISSN 1879-1298
Journal Chemosphere
Quellenangaben Volume: 13, Issue: 8, Pages: 939-946 Article Number: , Supplement: ,
Publisher Elsevier
Publishing Place Kidlington, Oxford
Reviewing status Peer reviewed
Institute(s) Institute of Ecological Chemistry (IOEC)
Scopus ID 0021167409
Erfassungsdatum 1984-12-30