Q: This happened to my Mexican plum last summer. What caused it, and what can I do to prevent it this year? A: At first glance I thought this had been caused by caterpillars, but then I decided to ...

A picture of leaves with leaf spot disease. - Boyloso/Shutterstock Have you noticed discolored spots or lesions on the leaves of your plants? This could be leaf spot disease, and it's wreaking havoc ...

Your photo and description indicate Septoria leaf spot, which is very common on Rudbeckia and is prevalent in Illinois. The disease begins on lower leaves and progresses up the plant but does not ...

There are many different types of diseases that can affect tomato plants. Backyard gardeners need to be aware of these diseases, so they do not ruin your entire crop. Even if you only have a few ...

Are the leaves of your cucumber plants wilting despite consistent watering? Do you notice brown, white, or yellow spots on the leaves or cucumbers? Your cucumber plant may be infected by bacterial, ...

Question: I have a plum tree with little holes in the leaves. This happened last summer and again this spring. Can you tell me again what the cause could be and how to treat it?

Our Indian hawthorn bushes seem to have a disease. They were thriving a few weeks ago, and now they are practically bare. The leaves have spots and are turning red and dropping off. What would you ...