You might try posting over on the Tropical Fruit Forum and see if anyone there has experience with this tree.

Looks like Cherry Leaf Spot to me. This occurs in areas where there is some significant summer humidity. It is a fungal disease (Blumeriella jaapii). There are lots of great resources out there on how to treat this. You might want to check your local University Extension Program for appropriate fungicides for your area. You can try Spectracide Immunox Multi-Purpose Fungicide. I've included a nice article about Cherry Leaf Spot below. Patty S. Here is a link that might be useful: West Virginia Kerneysville: Cherry Leaf Spot

We live in Campbell CA and have lost a few trees already (Plum, Cypress, Bottle Brush), and now both of our orange trees are under attack. One is about dead, and the other is showing signs of the same black branch. Seems to start at the tops of the tree and work its way down, although I see smaller signs of the black branch throughout the trees. We have tried deep watering, fertilizer but notthe sure if this is something else. Help! We love the orange tree and dont want to lose this.

Fig trees are extremely resilient. Although it dropped it's leaves due to water stress, it will, no doubt, start sprouting leaves again with regular watering, although I wouldn't expect to see any figs this season. If an 8 year old tree dropped it's leaves after a week, I take it that it is in a pot(??). If so, get it out of the direct sun for a spell until it starts budding again. I left the watering of my yard in the charge of a friend, several years ago, for 10 days, which he, in turn, sent his girlfriend over to water , which ultimately lead to the total death and destruction of everything that was growing in my yard. I always say, If you want dead plants, put them in the charge of your friends when you go on vacation. Hang in there. Your tree will shine again. FF