Lab #1 Non-infectious Diseases
Salt Damage on Harwoods:
Salt Damage on basswood: Note necrosis and chlorosis at edge of leaves.
Salt Damage on oak.
Salt Damage on maple.
Salt Damage on pine: Tips of needles are affected, first turning chlorotic then necrotic.
Herbicide Damage- This herbicide caused curling of leaf edges as well as the "Shepard's crook" (branch tip curling or epinasty) and killed the tree.
Herbicide Damage on aspen - low concentrations of herbicides can cause distorted growth and odd looking leaves.