nora jackson Staff asked 16 years ago
hi gerry, our street has about 6 silver birch trees, all around 20-25 yrs old . no troubles until now, but this year they are infested with white and green flies, we park under these trees and there is a sticky coating and flies all over the cars every day. the trees are as high as the houses–2 stories–so no chance of spraying!!. can you advise –or will a severe frost in the winter take care of the problem if we wait it out? thanks grerry.