The toxicity of pesticide residues has been tested and, in some cases, restrictions have been placed on the use of a product. The restrictions are usually labeled "Days-to-Harvest Intervals" (DHIs) or "Preharvest Interval" (PHI). The DHI or PHI is a period of time that must pass before fruit can be harvested after the application of a particular pesticide. If DHIs or PHIs have been established, they can be found on the pesticide label.
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