My avocado tree looks like someone machine gunned the leaves with BB's. It is a good 25 feet high and not one bug in the entire tree. My hibiscuses are also riddled with tiny holes but I see no bugs anywhere. It is hard to imagine that slow moving snails can reach the leaves of my avocado in one night and disappear in the morning. I have found small snails, the cone type, in the soil around my hibiscuses. I gathered two entire public bags full of them. But the holes keep appearing on the new leaves. Man I am a really good snail grower, but not so good with my trees. However, by the avocado I do not see anything. Somebody help me!!