This green pepper tree is planted beside a tomato plant bed. This poor little pepper got injured that way and fell down. I am really worried that this infection can spread to the tomatoes. I have a lot of green tomatoes on the trees and I want to protect them. What should I spray. The neighbor has two old shade trees on the property line. These two trees are the most neglected trees in America could the infection is coming from these trees especially yellow leaves are falling on my vegetable plants daily. I can spray the trees if I need to but with what?. The neighbor does not give a dam about it.

please help

Abe