Hello I have a container acer about 12 years old, i have noticed on the trunk and some main branches there are raised spots of fluffy white (looks like mould) stuff with a brown top, when i wiped one off the trunk it was sticky, can anyone tell me what this is and should i treat it. Many thanks Lisa from the UK
Hi there Many thanks for the replies, you are quite correct, looked up some pictures and it is scale insect, thank you for your help. Regards Lisa