Can't use bird netting here, unfortunately. Not only is my bird feeder actually IN the tree, but every time I've tried using netting, the local black racer snakes get caught in it. (small heads fit through, fat body gets stuck) I like having the snakes around as they keep the rodent population in check now that my cat has decided that at 15 she is too dignified to catch mice.
Yup, I'm watering under the tree as well. Micro irrigation down near the ground so that water doesn't wet the leaves. But we've had so much rain the leaves have hardly had a chance to dry at all in the last few weeks.
The tree is maybe 4 years old, 8ft. tall and as wide, but well spread out so there's lots of air movement, too. We just have every fungus known to man floating around here in summer. Two years ago when the rust spots started to show up, I literally went out there every day after it rained and sprayed the tree with baking soda/water. It's supposed to slow down the fungal infection rate by changing the pH on the leaf surface to be inhospitable to fungi. Well, the rust just started up on the undersides of the leaves instead. Last summer, I carefully picked off every leaf as they started to show rust. Well, pretty soon had to give that up, no more leaves left.
Don't you get this rusty fungus on your tree where you are?
@greene