Experts and BHG readers answer.
brown leaves that are falling off
Well first of all, when a tree acts like this, it's generally due to an environmental problem. If the leaves are browing and falling I highly doubt it's a pest problem and I would never allow someone to spray my place like that. I have seen some trees here in Des Moines doing the same thing and I can't help but think it's partly due to the odd weather we've been having in the midwest. If I were you, I'd take a sample to your local extension service or certified nursery person to get an up-close examination of the leaves, especially since we can't see them ourselves. And, don't let yourself get talked into spraying the tree or your grounds."