Q.What does it mean when a citrus tree saps?
My spouse has had this citrus tree for a long time, and he passed away Dec. 27, 2018. His Citrus Tree has been sapping since then. What can I do to help this Citrus Tree? Please do email me, thanks. lisamariemantha@live.ca
The sap you are referring too is likely Honeydew; which is the residue from pests.
You can spray with a horticulture soap spray.
These articles will help you.
https://www.gardeningknowhow.com/edible/fruits/lemons/pests-of-lemon-trees.htm
https://gardeningknowhow.com/plant-problems/pests/pesticides/homemade-soap-spray.htm