INFLUENCE OF IRRIGATION AND TIME ON LEACHING OF FENAMIPHOS IN SOIL COLUMNS AND ITS UPTAKE AND ACCUMULATION BY TOMATO PLANTS

E. Loffredo, N. Senesi, V. A. Melillo, F. Lamberti

Abstract


The effects of three irrigation levels on the leaching of surface incorporated fenamiphos and its metabolites in soil columns and its uptake and accumulation by tomato plants was studied in a greenhouse experiment. Leaching and the disappearance of the nematicide in soil were differently affected by the amount of water added; leaching was highest with higher irrigation levels whilst the highest rate of fenamiphos degradation was found with the lowest water dose used. The irrigation level influenced the amount of fenamiphos residue in plants only in the first stage of growth. The residue concentration in both shoots and roots decreased markedly along an experimental period of 91 days. About 90% of the nematicide absorbed by tomato plants accumulated in the leaves.

Full Text:

PDF