Dead Leaves on Lime Tree

Question

My lime tree leaves look dead and curled up. They also have a clear sap-looking sustance on the leaves and branches. The trees that have the sap are not dead looking. What fertilizer is best to use on them and how often?

Answer 1

This may be a sign of a pest infestation. Typically citrus leaf curl is caused by aphids but could also result from scale. The sappy substance is honeydew. Neem oil should help with the problem. Here is an article that will help as well: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm