Q.Jatropha tree problem
My 2-year old jatropha has begun to drop its leaves. Leaves turn yellow with brown spots and then fall off. The tree is sparse and has never been full and lush as the many other jatropha trees in my community. I live in a gated community in which our landscaper fertilizes and cuts back as necessary. He feels nothing is wrong with my jatropha but it is smaller and sparser than the dozens of jatrophas that grow in my community. Can I do anything? Thank you.

It doesn't look bad. It may just need a little more light than it receives. If you are concerned with an infection starting in the soil, you can apply wettable sulfur as a precautionary measure. Here is an article for proper care of the tree: https://www.gardeningknowhow.com/ornamental/trees/jatropha/jatropha-cucus-tree.htm