This is a picture of leaves from one of my son's hibiscus. He wants ME to tell him how to fix it. The 2 top pics are the front and back of the same leaf. He says it looks like hot wax has been dripped on it. The bottom pic is a different leaf. His message was "what are these pale silvery spots? is it a fungus? how can i get rid of it? the other is a different leaf. bugs? or mold???????"
Can anyone help us ID these problems? Thanks!
Thanks, my first suggestion was to research powdery mildew. He wanted me to ask here since I'm always telling him about DG and the problem solving that goes on here. He has been directed here by plant searches several times recently, don't you think he oughta just join the fun?? LOL
Assuming this is powdery mildew what's a good non chemical wa to cure it?