I have a pecan tree that's approximately 50-60 yrs old. Each yr it looses the leaves and pecans early. I'm not sure if it's insects or a fungus. I'm in East Texas. I used a general pesticide for insects for pecan trees. I sprayed the tree when the buds started showing in April. I sprayed it 2 more times approximately 2-3 weeks apart. I was not able to spray the top of the tree due to it being so tall. I fertilised under the tree with urea the first time last spring. I fertilised this spring twice with a 24-10-10. I'm not sure what the issue is. Here are some photos. We just had a rain. That's the wet appearance.