Hello all - I am very new to this whole gardening thing as we have recently bought a home with a nice backyard, a citrus tree (of some sort) and a Papaya tree. I am enthusiastic about this, but need to know more about the citrus tree and how to properly take care of both the citrus and the Papaya. The citrus looks mature and I have determined that it does have sooty mold (after observing an abundance of whiteflies), but seems to be producing fruit. The citrus tree had nothing on it when we first moved in at the end of April and now has golf ball sized green balls which are perfectly round and rather hard. I cut one open, but can't tell yet if it smells like lime, orange or grapefruit. Have a look and let me know what you think! Also, what is the best way to get rid of whiteflies and the black sooty mold without contaminating the fruit or hurting the tree?? The tree may also have scales, but I am not sure.. Also does anyone have an idea of how old the tree is? My Papaya tree is about 8-9 feet tall and produces fruit nicely. We have VERY sandy soil.. how should I be maintaining these trees? Does the Papaya need to be trimmed regularly? Thanks a bunch!