I still remember when I was a kid, I went to a small here just inside my home town. I’ve seen these trees with extrememly bumpy leaves. I thought it must be illness and I was really disgusted! These leaves are just so… terrible! I thought there must be insects or something in these bumpy leaves. Because they look so disgusting, I did not touch these leaves ‘cos I have no idea what will come out. Now I think those leaves I saw, just look like the symptom of peach leaf curl caused by plant pathogenic fungi!