Aphids on Plum Tree
I apologize if this is a duplicate, several times over! Almost overnight I discovered an infestation of aphids on a plum tree. The local garden store recommended a spray formulated for fruit trees as a first step. If that doesn't work, they recommended a systemic insecticide placed at the base of the tree for 12 months of control. The caveat to the systemic recommendation was that the fruit would be poisonous. Adjacent pear and apple trees are not yet affected, but that's apparently likely. I'm reluctant to spray because of vegetables near the trees. Suggestions?