elaine mccarthy Staff asked 14 years ago
yesterday while out inspecting the spring progress of my garden i noticed that one of my 3 alder trees was covered in green fly. I had intended washing this off this morning with soapy water ( which works for my lilium in the summer) but this morning rain has prevented this.My question is why is this tree being attacked. It was planted last spring and is other wise healthy. I have Scots pine, willow, ash, hazel and haw thorn planted nearby, are these susceptible too? i prefer not to use chemicals in the garden.