I planted two new JM's last spring. Both are infested with small brown bugs on the newly emerging leaves. I am guessing it's Aphids based on some google searches, so I sprayed with insecticidal soap that supposedly kills Aphids on contact. But It doesn't appear to be working...any ideas?
I have another JM that is well-established (12 years old) and it doesn't have any bugs. Does that mean my two new ones are weak and more pest-prone? Should I be looking for anything else?