Hi Everyone!

I am new hear and saw a wealth of information with solutions to problems with gardens so I signed up and sent some pictures. I have two posts, but this one is first. This is my orange tree.

The leaves are sickly and getting worse. Not sure, but is rust? I live in Southern California, and have taken this over from the previous owner. The tree is out door plenty of sun and about 9 feet tall bushy but beginning to thin as this disease progressed. The oranges tend to be rotted through the bottom too. Two seperate issues? Any help would be greatly appreciated!!! Thank you in advance.

Reid

oh and a cure if possible lol.