Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Tomato plants were grown in silty loam soil in a greenhouse. When the fruit were ripe, the plants were treated with acephate, methamidophos, or pirimiphos-methyl to investigate the residues and half-lives of the pesticides. Leaves were picked 1, 3, 7, 10, 14, 21, 28, 35, 42, 50, and 56 d after spraying, and analyzed by gas chromatography. Results indicated that the half-lives of the pesticides were very similar for leaves and fruit, and were not influenced by the rate of application. The initial retention on the leaves was inversely proportional to the solubility of the insecticides in water. On fruits, the retention of pirimiphos-methyl was equal to that of acephate, and both were greater than that of methamidophos. Insecticide residues were detected in all tissues. Results indicated that pirimiphos-methyl, which had a somewhat shorter half-life than the other pesticides, could be used as a potential substitute for other, more toxic organophosphorus insecticides.