Absorption, transport, metabolism and accumulation of acephate from soil to tomato
Acephate, a substitute for highly toxic pesticide methamidophos, has the characteristic of low toxicity and broad-spectrum, and attracts great concerning because of its toxic metabolites, methamidophos. In this study, we used tomatoes grown in pots as the research objects, using 300 mg / L and 600 mg / L of acephate to the tomatoes by root-irrigation, and studied the processes of absorption of acephate through the root of tomatoes, and then the transport to and accumulation in the fruit. The results showed that acephate in the soil can be absorbed by the roots and then be transported to tomato fruit. The process of the migration of acephate from the soil to the fruit produces a high toxic metabolite-methamidophos, indicating that the use of acephate in tomatoes will introduce some kind risks.