Hi every experience grower. I have a problem about my plant. I am in Asia. I put them in rooftop, it pretty much like a greenhouse. In this week, i found that some of the leafs fell down, but they look not like they were withered. However, I found some red and brown color wound on the stem. However, I don't know what happened, and can't see any insect. But it looks like something was eating the stem and cause the leaf fall down. I don't see any similar problem on this website, but I really hope someone could help me solve my plants. Please help me~~