Q.Aphids on Raywood Ash trees
Is there anything that could be put at the base of Raywood ash trees to detour aphids on our mature trees? We have 5 beautiful mature Raywoods in our parkway,that in the last couple of years have been covered in aphids. The trees seem to do alright, but then the aphids go after other plants. My thinking is if I can control them in the trees the infestation in the rest of my yard wont be as bad.
There are many ways to help this. I use neem oil for aphid control. Just make sure that if you are spraying on any leaves to do so when it is cloudy, or not in full sun. This collection of articles will give you information on making your own pest control, among many other useful articles: https://www.gardeningknowhow.com/special/organic/