I have a problem with one of my trees. Along my fence I have a cherry tree, plum tree and two Caraganas. Last year my cherry and plum trees were infested with aphids and I had to spray the trees. This year the cherry tree is fine but the plum tree is infested again with aphids. The tree is a haven for lady bugs and caterpillars. I'm planning on spraying the tree tonight. Does anyone know why this tree is attracting aphids?
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