Myhawthorn edge is covered in a sticky substance
By Silverbirch9
West Yorkshire,
United Kingdom 
My hawthorn edge is covered in a sticky substance .... what could it be and how shall I treat it ?
2 Oct, 2011
Could be honeydew, secreted by aphids. Spray with systemic insecticide to kill aphids and very dilute washing-up liquid a few days later to wash away honeydew otherwise you will get a sooty mould.
2 Oct, 2011