Deborah maple is producing heavy sap on all its leaves. It has never done this before. Is it most likely because of bacteria, or sickness in the tree?
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Deborah Maple
Nikki
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on May 25, 2012
Unfortunately it is a bug infestation. The sap is actually honeydew, which several different pests secrete, such as aphids or scale. I would treat the plant with neem oil. Neem oil is very effective on these kinds of pests and is safe for people and pests. This article may help:
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
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