When an<unk>  is infected with<unk> , the root hairs die. The phytoplasma infection then moves up the bark and infects the phloem, depriving the tree of nutrients. Death of the phloem essentially strangles the tree. As the phloem is infected, it will change color and take on a wintergreen smell, similar to that of black birch or birch beer. The crown, top of the tree turns<unk> all at once, it can occur from July till September, when the leafhoppers are active. It turns<unk> from a lack of nutrients to the top of the tree.
Elm yellows
Saber shin
Jaipur foot
Reflex hammer
Squawk 
Clubfoot
Greenpilot
Lockets