Aphids in Linden Trees
We have a street of maturing linden trees (~60 trees) in our neighborhood that are causing all kinds of issues: sap from aphids covering cars and houses, while yellow jackets swarm in the summertime. Folks are scared to walk down the street. Because pesticide use on linden trees is banned, are there any viable large scale solutions available to deal with the aphids? Many homeowners suggest cutting all the trees down and starting over with a different species...are there any other options we could try first?
Polk County Oregon
Thank you for your question about managing aphids (Eucallipterus tiliae) in linden (Tilia) trees. There are methods to help contain populations, but monitoring for the onset of their life cycle is important. Here is a link to an Extension article explaining monitoring, biological and cultural controls available short of insecticides. (There are some organic chemicals which can be applied, including insecticidal soaps and oils, but if the trees are large, you'd probably want to leave this to specialists.) I hope this information is helpful. Good luck!