How do you save a tree sprayed with weed killer?

It all depends on what kind of weed killer was used, was the foliage on the tree sprayed or was the soil around the tree sprayed for weeds. What was the ratio of chemical to water used. The higher rate of chemical used can negatively effect the tree more than a lower rate. The leaves will begin to curl and than brown out. If the rate of chemical was used is low than the tree should come back. I am not sure if the fruit will be edible