Q: I just read the article about citrus trees ("Saving Your Backyard Citrus Crop," Jan. 24, Lynette Evans). I have a very small Meyer lemon tree that I brought into the house during the cold nights.

Sticky shiny goop has started covering trees, dripping on anything underneath. Folks are calling to ask what this is. They are also noticing lots of ants on the plants. Are the ants causing this goo?

Chanie Kirschner is a writer, advice columnist, and educator who has covered topics ranging from parenting to fashion to sustainability. Aphids are tiny, soft-bodied sap-sucking insects that can be ...