Oak, White
Symptom Cause  
Irregular tan or brown spots on leaves at veins; expand until leaves die; sometimes sunken spots on leaves
Anthracnose (on plants)
>
Swollen; sunken lesions on stems and trunk
Bacterial Canker
>
Small holes in bark and stems surrounded by sawdust
Borers
>
Holes in leaves
Caterpillars
>
Young portions of foliage disappear, or young tips disappear, bark peeled off
Deer
>
Swellings and growths on twigs and leaves
Gall Insects
>
Foliage turns pale or mottled
Lacebugs
>
Trees defoliated, brown egg cases appear on trunk
Larvae of Gypsy Moth
>
Leaves blistered and curled
Leaf Blister (fungus)
>
Leaves stippled, yellowing or bronze; dry out and drop may be webbing visible; sometimes galls form on leaves
Oak Mites
>
Leaves turn bronze; wilt; drop
Oak Wilt
>
Leaves coated with white powder
Powdery Mildew
>
Bark of trunk and roots gnawed
Rodent Injury
>
Small bumps on leaves and branches
Scale Insects
>
Mushrooms sprout at base of tree
Shoestring Root Rot (fungus)
>
Small twigs and branches drop off
Twig Pruner
>