Please help, this is my first year in Arizona, and I started these container plants in April. So far they have made it through the summer just fine, but the past week I have been seeing droppings on the plants and small holes. This is most noticeable on the basil, but also is apparent on the tomatoes, jalapenos, and zucchini. I think it seems like there are small white flies, but I am not sure if they are doing this. Any ideas on a safe way to treat this without harming the plants?