If we increase U.S. grower costs by removing methyl parathion, China growers will still be able to use the same chemical. We simply ship peaches from China, and the peaches have the same residues of methyl parathion. Otherwise, it is unlikely that the U.S. can unilaterally cancel the use of methyl parathion on peaches worldwide. On the other hand, let's suppose the United States does cancel the tolerance for methyl parathion on peaches. Legally, no other country can ship peaches into the United States if methyl parathion has ever been used in their production.
Methyl parathion is a very toxic material, but it breaks down quickly.
If Chinese growers use methyl parathion with an appropriate pre-harvest interval, it is unlikely that the United States could detect residues by the time the peaches reached our markets. Let's review our goals. Move more peach production from the eastern United States to China or other countries. Import peaches from China or other countries where the growers use the same methyl parathion. Create international trade problems for our exports because we refuse to import peaches from countries where methyl parathion can be used, even if we cannot detect it.