woolly aphid on crab apple tree
Have had my crab apple tree for about 10 years. Woolly aphid appeared 2 summer's ago. they are disfigering the branches and seem to over winter on the tree. Is that possible? They make a mess of the plants underneath. I don't use pesticides, has anyone got any suggestions of how to deal with them. I hose them off regularly but the always come back. Thank you.