Trees and Shrubs
Anthracnose of Sycamore and other Shade Trees
Ants
Aphids
Cedar-Apple and Related Rusts
Fireblight on Trees
Affected Plants: Apple, flowering crabapple, pear, ornamental pear, firethorn, hawthorn, cotoneaster, quince, mountain ash.
Apple and Crabapple Powdery Mildew
Apple Scab
Gummosis of Trees
Arborvitae Fall Needle Drop
Seiridium Canker
Armyworms and Cutworms
Ash/Lilac Borer
Lilac Leaf Spot
Ash, Emerald Ash Borer
Ash Flower Gall Mite
Ash, Mycosphaerella Leaf Spot
Ash Plant Bug
Ash Rust
Ash Sawfly
Bagworms
Bark Shedding
Bleeding Cankers on Shade Trees
Borers in Trees
Botryosphaeria Canker of Juniper
Botryosphaeria Canker of Oak
Boxelder Bug
Bronze Birch Borer
Affected Plants: Paper birch, yellow birch, gray birch, poplar, cottonwood and willow
Cankerworm
Cherry Leaf Spot
Affected Plants: Sour cherry, almond, dwarf Russian almond; bitter, black, Japanese flowering, mahalen, pin, sand, and sweet cherries; chokecherry; cherry laurel; and Canada, common, Japanese, and wild plums.
Cottonwood Borer
Dodder
Diplodia Tip Blight of Pine
Dothistroma Needle Blight of Pine
Dutch Elm Disease
Eastern Tent Caterpillar
Elm Flea Weevil
Elm Leaf Beetle
Elm Pocket Gall
Woolly Elm Aphid
Environmental Stress on Trees
Euonymus Scale
Affected Plants: Euonymus, camellia, boxwood, bittersweet, daphne, eugenia, English ivy, hibiscus, holly jasmine, privet, honeysuckle, olive, pachysandra and stone fruits
European Pine Sawfly
Fall Webworm
Flatid Planthopper
Flooding and Plants
Freeze and Frost Damage in Spring
Frost Cracks on Trees
Galls of Trees
Vein Pocket Gall of Oak
Girdling Roots
Green June Beetles
Affected Plants: Apricots, nectarines, peaches, plums, prunes, apples, pears, grapes, figs, blackberries, and raspberries
Hackberry, Island Chlorosis
Hackberry Nipple Gall Maker
Hawthorn Rust Diseases
Honeylocust, Plant Bug/Leafhopper Complex
Honeysuckle Aphid
Hypoxylon Canker of Oak
Iron Chlorosis of Trees
Affected Plants: Pin oak, silver maple, bald cypress, crabapple and sweet gum; white pine, elm, London planetree, cottonwood, walnut, sugar maple, Eastern red cedar, Bradford pear and willow
Japanese Beetle
Affected Plants: rose, birch, linden, crabapple, grape, Virginia creeper, and buckeye
Jumping Oak Gall
Juniper, Cercospora Needle Blight
Juniper, Kabatina Tip Blight
Juniper, Phomopsis Tip Blight
Juniper Root Diseases
Juniper Webworm
Kermes Oak Scale
Lace Bug
Leaf Drop in Spring
Leaves That Don't Drop in the Fall
Lecanium Scales
Maple Bladdergall Mite
Mapleworm
Magnolia Scale
Mimosa Webworm
Minute Pirate Bug
Two-Spotted Mite
Nantucket Pine Tip Moth
Natural Needle Drop
Nematodes
Oak Gall Midge
Oak Lace Bug
Oak, Obscure Scale
Scarlet Oak Sawfly
Oak Wilt
Peachtree Borer
Leaf Rust
Pseudomonas Blight
Pine, Brown Spot
Pine Needle Scale
Pine Tortoise Scale
Pine Wilt
Russian Olive, Phomopsis Canker
San Jose Scale
Scorch of Trees and Shrubs
Bacterial Wetwood and Slime Flux on Trees
Sooty Mold
Spittlebugs
Spruce, Needle Drop and Twig Dieback
Rhizosphaeria Needlecast
Spruce Spider Mite
Squirrel Damage
Sunscald on Trees
Affected Plants: Honey locusts, fruit trees, ashes, oaks, maples, lindens and willows and other thin-barked trees
Control Unwanted Trees
Trees, Lack of Fall Color
Verticillium Wilt of Trees
Affected Plants: Catalpa, maple, Russian olive, redbud, smoketree, golden-rain tree, cherry and other stone fruits, and barberry
Trees, Winter Damage
Trees with Cavities
Trees with Mushroom Growth
Tubakia Leaf Spot of Oak
Affected Plants: Primarily oaks but also maple, hickory, chestnut, redbud, ash, tupelo, sourwood, rose, sassafras & elm.
Twig Girdler
Affected Plants: Elm, hickory, oak, linden, hackberry, apple, pecan, persimmon, poplar, sour gum, honeylocust, dogwood, and some flowering fruit trees
Walnut Caterpillar
Affected Plants: Primarily black walnut, pecan, and several species of hickory but may also attack birch, oak, willow, honeylocust and apple
Walnut Wilt
Affected Plants: Tomato, potato, blackberry, apple, lilac, asparagus, chrysanthemum, and peony.
Whiteflies
Yellow-Bellied Sapsucker
Yellownecked Caterpillar
Affected Plants: Apple, pear, cherry, oak, hickory, beech, birch, elm, maple, pear, cherry, oak and walnut