General Pests

Ants

Carpenter Ant

Affected Plants: decaying wood
Read More (pdf)

Anthracnose of Sycamore and other Shade Trees

Sycamore Anthracnose

Affected Plants: Sycamore, Maple, Ash, Elm, Oak and Walnut.

Anthracnose of Turf

anthracnose on turf

Affected plants: Creeping bentgrass, annual bluegrass, Kentucky bluegrass, and tall fescue

Anthracnose of Watermelon, Cucumber, Muskmelon

watermelon anthracnose

Affected plants: Watermelon, cucumber, and muskmelon

Aphids

Aphids on Branch

Affected Plants: most plants
Read More (pdf)

Apple and Crabapple Powdery Mildew

Powdery mildew of crabapple

Affected Plants: Apple, flowering crabapple

Apple Pest Control

Codling moth larvae on apple

Affected Plants: Apple

Apple Russeting

Affected Plants: Apple and pear

Apple Scab

apple scab

Affected Plants: Apple, flowering crabapple

Apple and Pear, Sooty Blotch and Fly Speck

sooty blotch on apples

Affected Plants: Apples, pears and various wild hosts.

Arborvitae Fall Needle Drop

arborvitae-needle-drop

Affected Plants: Arborvitae

Arborvitae, Seiridium Canker

seiridium canker arborvitae

Affected Plants: Oriental Arborvitae

Armyworms and Cutworms

Cutworm Moth

Affected Plants: numerous
Read More (pdf)

Fall Armyworms

Fall Armyworm

Affected Plants: mainly grasses
Read More (pdf)

Ash/Lilac Borer

ash borer

Affected Plants: Lilac, ash, mountain ash, and occasionally privet

Ash, Emerald Ash Borer

emerald ash borer

Affected Plants: Ash

Ash Flower Gall Mite

ash flower gall mite

Affected Plants: Ash

Ash, Mycosphaerella Leaf Spot

ash leaf spot

Affected Plants: Ash, walnut

Ash Plant Bug

ash plant bug

Affected Plants: Ash

Ash Rust

ash rust

Affected Plants: Ash and cordgrass

Asian Jumping Worms

asian jumping worm

Affected plants: Lawn, turf, soil

Asparagus Beetle

Asparagus beetle

Affected plants: Asparagus

Ash Sawfly

brownheaded ash sawfly

Affected Plants: Green Ash, other ash

Aster Yellows

Coneflower - Aster Yellows

Affected Plants: numerous
Read More (pdf)

Bacterial Spot on Fruit Trees

bacterial spot on peach fruit

Affected Plants: Peach and nectarine and, to a lesser extent, apricot and plum

Bacterial Wilt of Vine Crops

bacterial wilt

Affected plants: Cucumber, muskmelon, squash, pumpkin, and gourd

Bagworms

bagworms

Affected Plants: Junipers, arborvitae

Bark Shedding

bark shedding

Affected Plants: Sycamore, London planetree, eastern redbud, silver maple

Bean Leaf Beetle

bean leaf beetle

Affected plants: Beans, peas, cowpeas, soybeans, and corn

Bermudagrass Spring Dead Spot

dead spot on bermuda grass

Affected plants: Bermudagrass

Blackberries and Raspberries, Tan Drupelets

Blackberry tan drupelets

Affected plants: Blackberry and raspberry

Black Knot

black knot

Affected Plants: Cherries, plums, peaches, apricots

Black Rot on Grapes

Carpenter Ants

Affected plants: Grapes

Bleeding Cankers on Shade Trees

bleeding canker

Affected Plants: Pin oaks, willows, cottonwoods, and honeylocust

Blister Beetles

blister beetles

Affected plants: Tomatoes, beans, peas, potatoes, and other vegetables

Blossom-End Rot

blossom end rot

Affected plants: Tomato, Pepper, Squash, Eggplant and Watermelon

Blueberries, Iron Chlorosis

iron chlorosis of blueberries

Affected plants: Blueberries

Bluegrass and Zoysia Billbugs

billbugs

Affected plants: Primarily Zoysiagrass and Kentucky Bluegrass

Borers in Trees

borers in trees

Affected Plants: numerous trees

Brown Rot of Fruit Trees

brown rot of peach

Affected Plants: Peach, Nectarines, Apricots, Plums, Cherries, Apples

Brown Patch of Turf

brown patch on turf

Affected plants: many turfgrasses but most severe on tall fescue, perennial ryegrass and creeping bentgrass

Botryosphaeria Canker of Juniper

Affected Plants: Juniper

Botryosphaeria Canker of Oak

Botryosphaeria Canker of oak

Affected Plants: Oak

Boxelder Bug

boxelder bug

Affected Plants: Boxelder, maple, ash

Bronze Birch Borer

birch borer

Affected Plants: Paper birch, yellow birch, gray birch, poplar, cottonwood and willow

Budworms

budworms

Affected plants: Petunia, Geranium, Roses, Tobacco

Burning Bush Spider Mites

burning bush mites

Affected plants: Burning bush

Cabbage Looper

cabbage looper

Affected plants: Cabbage, broccoli and cauliflower

Cabbageworm

imported cabbageworm

Affected plants: Cabbage, Broccoli, Cauliflower

Cankerworm

cankerworm

Affected Plants: Elm, hackberry, honeylocust

Carpenter Bees

Carpenter bee on untreated wood

Affected Plants: untreated wood

Cedar-Apple and Related Rusts

Cedar Apple Rusts

Affected Plants: Apple, flowering crabapple, juniper, cedar.

Affected Plants: untreated wood

Cedar-Apple Rust Control on Fruiting Apples

Cedar Apple Rust on leaf

Affected Plants: Apple, flowering crabapple, juniper, cedar.

Cherry Leaf Spot

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.

Chiggers

Red Chigger on dirt

Affected: Humans and other animals

Chinch Bug

cinch bugs

Affected plants: Primarily zoysiagrass but may infest buffalograss, bermudagrass, and bluegrass.

Clover

white clover

Affected plants: White clover, lawn, turf, weeds

Cicada Killer

Cicada Killer Wasp on Leaf

Affected Plants: none, affects cicadas primarily

Codling Moth on Apple Trees

codling moth larvae

Affected Plants: Primarily apples but may also attack pears, crabapples, walnuts, quince and other fruits.

Colorado Potato Beetle

colorado potato beetle

Affected plants: Potato, tomato, eggplant, pepper, tobacco, and other solanaceous

Corn Earworm

sweet corn earworm

Affected plants: Sweet corn

Corn, Poorly Filled Ears

poorly filled ear of corn

Affected plants: Sweet Corn

Corn Smut

corn smut

Affected plants: Corn

Cottonwood Borer

cottonwood borer

Affected Plants: Cottonwood, willow, poplar

Crabgrass

crabgrass in sidewalk

Affected plants: Crabgrass, lawn, turf, weeds

Cucumber Beetle

cucumber beetle

Affected plants: Cucumber, cantaloupe, squash, pumpkin, gourd, and watermelon. May also affec beans, corn, and potatoes

Cucumber Bitterness

bitter cucumbers

Affected plants: Cucumber

Dandelion

dandelion

Affected plants: Lawn, turf, weeds

Dodder

Affected Plants: numerous

Diplodia Tip Blight of Pine

diplodia tip blight

Affected Plants: Austrian pine, ponderosa pine, Scots pine and mugo pine

Dollar Spot on Turf

dollar spot on turf

Affected plants: All common turfgrass, lawn

Dothistroma Needle Blight of Pine

dothistroma needle blight

Affected Plants: Austrian, ponderosa, and mugo pines

Dutch Elm Disease

dutch elm disease

Affected Plants: American elm, red or slippery elm, rock elm and cedar elm

Earthworms in the Lawn

earthworms

Affected plants: Turf, lawn, soil

Eastern Tent Caterpillar

eastern tent caterpillar

Affected Plants: Wild Cherry, various ornamental shrubs, shade, and forest trees.

Elm Flea Weevil

elm flea weevil

Affected Plants: Elm

Elm Leaf Beetle

elm leaf beetle

Affected Plants: Elms

Elm Pocket Gall

elm pocket gall

Affected Plants: American elm

Woolly Elm Aphid

wooly elm aphid

Affected Plants: Elm

Environmental Stress on Trees

environmental stress on trees

Affected Plants:

Euonymus Scale

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

european pine sawfly

Affected Plants: Primarily Scots and Mugho Pines

Fall Webworm

fall webworm

Affected Plants: almost all fruit, shade, and ornamental trees

Fireblight on Trees

Fireblight

Affected Plants: Apple, flowering crabapple, pear, ornamental pear, firethorn, hawthorn, cotoneaster, quince, mountain ash.

Flatid Planthopper

Affected Plants: numerous

Flea Beetle

flea beetle

Affected plants: Watermelons, pumpkins, peas, beans, eggplants, sweet potatoes, beets, spinach, strawberries and potatoes

Flooding and Plants

Flooding and plants

Affected Plants: all

Freeze and Frost
Damage in Spring

Freeze and frost damage on plants

Affected Plants: numerous

Frost Cracks on Trees

bark splitting

Affected Plants: Fruit trees, maples, lindens, willows and other thin-barked trees

Galls of Trees

gall on leaf

Affected Plants: Oaks, trees, shrubs

Girdling Roots

girdling roots

Affected Plants: Maples, numerous others

Grapes, Downy Mildew

downy mildew on grapes

Affected plants: Grapes

Grasshoppers

Grasshopper

Affected plants: All

Grassy Sandbur/Stickers

grassy sandbur

Affected plants: Lawn, turf

Gray Leaf Spot on Perennial Ryegrass

gray leaf spot on turf

Affected plants: Perennial Ryegrass

Green June Beetles

green june beetle on blackberry

Affected Plants: Apricots, nectarines, peaches, plums, prunes, apples, pears, grapes, figs, blackberries, and raspberries

Grubs, White

white grubs

Affected plants: Bentgrass, Kentucky bluegrass, and the fine fescues.

Gummosis of Fruit Trees

Carpenter Ant

Affected Plants: Cherry, peach, plum, apricot

Hackberry, Island Chlorosis

island chlorosis hackberry

Affected Plants: Hackberry

Hackberry Nipple Gall Maker

nipple gall psyllid

Affected Plants: Hackberry

Harlequin Bug

harlequin bug

Affected plants: Cabbage, collards, horseradish, mustards, and turnips. May also feed on potatoes, tomatoes, and okra

Hawthorn Rust Diseases

cedar quince rust on hawthorn twig

Affected Plants: Hawthorn

Henbit and Chickweed

Henbit

Affected Plants: any, considered weed

Herbicide Damage on Garden Plants

herbicide damage on plants

Affected plants: All plants affected but tomato, potato, grape, and redbud very sensitive

Honeylocust, Plant Bug/Leafhopper Complex

honeylocust leafhopper

Affected Plants: Honeylocust

Hollyhock Rust

holyhock rust

Affected plants: Hollyhock, Rose Mallow, Rose-of-Sharon

Hollyhock Weevil

hollyhock weevil

Affected plants: Hollyhock

Honeysuckle Aphid

honeysuckle aphid

Affected plants: Honeysuckle

Impatiens Downy Mildew

Impatiens downy mildew

Affected Plants: Various Impatiens

Iris Bacterial Soft Rot

iris bacterial soft rot

Affected plants: Iris

Iris Borer

iris borer

Affected plants: Iris

Iris Leaf Spot

iris leaf spot

Affected plants: Iris

Iris Weed Control

iris weed control

Affected plants: Iris

Iron Chlorosis of Herbaceous Plants

iron chloriosis of herbaceous plant

Affected plants: Strawberries, Blueberries, Annual Flowers, Vegetables

Iron Chlorosis of Trees

iron chlorosis on 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: numerous, including rose, birch, linden, crabapple, grape, Virginia creeper, and buckeye

Juniper, Cercospora Needle Blight

juniper needle blight

Affected Plants:

Juniper, Kabatina Tip Blight

kabatina tip blight

Affected Plants: Upright and spreader juniper species

Juniper, Phomopsis Tip Blight

Phomopsis tip blight of juniper

Affected Plants: Upright and Spreader juniper

Juniper Root Diseases

root disease of juniper

Affected Plants: Upright and spreader juniper species

Juniper Webworm

juniper webworm

Affected Plants: Juniper

Kermes Oak Scale

kermes oak scale

Affected Plants: Primarily pin and bur oaks

Lace Bug

lace bug

Affected Plants: Cotoneaster, sycamore, ash, hickory, oak, hawthorn and mulberry

Lady Bug Asian

Asian Lady Bug

Main impacts: aphid infestations and overwintering in buildings

Leaf Drop in Spring

leaf drop in spring

Affected Plants:

Leaf Spot and Melting-out

cool-season melting-out

Affected plants: Primarily Kentucky bluegrass and tall fescue

Leaves That Don't Drop in the Fall

no leaf drop in fall

Affected Plants: Wide Variety of Woody Plants

Lecanium Scales

lecanium scale

Affected Plants: Numerous shade trees and woody ornamentals

Little Barley

little barley

Affected plants: Lawn, turf, weeds

Maple Bladdergall Mite

Maple Bladder Gall Mite

Affected Plants: Maples

Mapleworm

mapleworm

Affected Plants: Maples, boxelder, oak

Magnolia Scale

magnolia scale

Affected Plants: Saucer and Star magnolia

Mimosa Webworm

mimosa webworm

Affected Plants: Mimosa, honeylocust

Minute Pirate Bug

Affected Plants: numerous

Lilac, Powdery Mildew

powdery mildew of lilac

Affected plants: Lilac

Lilac Leaf Spot

Iris Leaf Spot

Affected Plants: Lilac

Mite, Two-Spotted

Two spotted mite

Affected Plants: numerous

Moles

moles

Affected plants: Lawn, turf, soil

Mosaic Virus of Vegetable Plants

mosaic virus

Affected plants: Tomato, pepper, cucumber, melons, squash, spinach, celery, beets, and petunia

Mosquitos

Mosquito

Main impacts: humans

Mushrooms in a Lawn

mushrooms in turf

Affected plants: Turgrass, lawn

Nantucket Pine Tip Moth

nantucket pine tip moth larva

Affected Plants: Ponderosa, Scotch, Austrian and Mugo pine.

Natural Needle Drop

natural needle drop

Affected Plants: Pines, arborvitae, spruce

Nematodes

Neamtodes on plant roots

Affected Plants: numerous

Oak Gall Midge

oak gall midge

Affected Plants: Pin oak

Oak, Hypoxylon Canker

hypoxylon canker of oak

Affected Plants: Oaks, maples, pecans, hickory, elms and other species

Oak, Jumping Oak Gall

jumping oak gall

Affected Plants: White oaks

Oak Lace Bug

oak lace bug

Affected Plants: Oak, cotoneaster, sycamore, ash, hickory, hawthorn and mulberry

Oak, Obscure Scale

obscure scale

Affected Plants: Oaks, pecan

Oak, Scarlet Oak Sawfly

scarlet oak sawfly

Affected Plants: Scarlet, black, pin, and white oaks

Oak, Tubakia Leaf Spot

tubakia leaf spot

Affected Plants: Primarily oaks but also maple, hickory, chestnut, redbud, ash, tupelo, sourwood, rose, sassafras & elm.

Oak Wilt

oak wilt

Affected Plants: Red oaks, shingle oak, post oak

Oak, Vein Pocket Gall

vein pocket gall of oak

Affected Plants: Scrub and Pin oak

Peach, Perennial Canker

perennial canker of peach

Affected Plants: Peach, apricot, plum, nectarine and sweet cherry

Peach Leaf Curl

peach leaf curl

Affected Plants: Peach, plum

Peachtree Borer

peachtree borer

Affected Plants: Peaches, plums, cherries, nectarines and apricots

Pear Leaf Rust

peachtree borer

Affected Plants: Pear, Hawthorn

Pitburn and Split Pit of Stone Fruits

Split pit in peach

Affected Plants: Primarily peaches, nectarines and apricots

Pseudomonas Blight

pseudomonas blight of trees and shrubs

Affected Plants: Lilac and ornamental flowering pears

Pine, Brown Spot

pine brown spot

Affected Plants: Scots, ponderosa

Pine Needle Scale

pine needle scale

Affected Plants: Pine, spruce, fir, hemlock, and, occasionally, yew and cedar

Pine Tortoise Scale

pine tortoise scale

Affected Plants: Pine trees including Scots, Austrian and red

Pine Wilt

pine wilt

Affected Plants: Scots, Austrian, and white pine

Oxalis (Yellow Woodsorrel)

Oxalis

Main impact: perennial weed in lawn

Roly-Polys, Pillbugs, & Sowbugs

Pillbug and rolypoly

Affected Plants: numerous young seedlings

Plum Curculio

plum curcoulio

Affected Plants: Plums, apples, cherries, peaches and other stone fruits.

Poison Ivy

Poison Ivy leavs

Main impact: rash in humans

Pollination Problems

Bee on flower petal

Affected Plants: numerous

Potato Tuber, Corky Bumps

corky bumps on potato

Affected plants: Potato

Potato, Green Tubers

green tubers on potato

Affected plants: Potato

Potato, Growth Cracks

potato growth cracks

Affected plants: Potato

Potato, Internal Darkening

internal potato darkening

Affected plants: Potato

Potato, Secondary Growth

potato secondary growth

Affected plants: Potato

Powdery Mildew of Cucurbits

powdery mildew of cucurbits

Affected plants: Cucumber, muskmelon, squash, watermelon, pumpkin

Powdery Mildew on Turf

powdery mildew on turf

Affected plants: Kentucky bluegrass (most susceptible), bermudagrass, red fescue, others

Rhubarb Crown Rot

Affected plants: Rhubarb

Rhubarb Seedstalks

rhubarb seedstalks

Affected plants: Rhubarb

Russian Olive, Phomopsis Canker

phomopsis canker russian olive

Affected Plants: Russian Olive

Rust on Turfgrass

rust on turf

Affected plants: All common turfgrasses

San Jose Scale

san jose scale

Affected Plants: Apple, peach, pear, pyracantha, quince and cotoneaster

Scab of Stone Fruits

peach scab

Affected Plants: Peaches, nectarines, apricots, and plums

Scorch of Trees and Shrubs

scorch

Affected Plants: numerous

Slugs

slug

Affected Plants: numerous, hostas

Sod Webworm

sod webworm

Affected plants: Kentucky bluegrass, buffalograss, bermudagrass and bentgrass

Sooty Mold

Sooty mold on leaf

Affected Plants: numerous

Spittlebugs

spittle bug

Affected Plants: Junipers and pine

Spotted Wing Drosophila

spotted wing drosphila

Affected plants: Blackberries, blueberries, boysenberries, raspberries, strawberries and grapes

Spruce, Needle Drop and Twig Dieback

blue spurce needle drop

Affected Plants: Blue Spruce

Spruce, Rhizosphaeria Needlecast

rhizosphaera needle cast of spruce

Affected Plants: Spruce

Spruce Spider Mite

spruce spider mite

Affected Plants: Spruce

Squash Bug

squash bug

Affected plants: Squash and pumpkin

Squash Vine Borer

squash vine borer

Affected plants: Primarily squash, pumpkins and gourds but cucumbers and melons also possible hosts

Squirrel Damage

squirrel damage

Affected Plants: Trees

Stalk Borer

Stalk borer

Affected Plants: numerous

Star-of-Bethlehem

Main impact: invasive in landscape

Stripe Smut of Turf

stripe smut on turf

Affected plants: Kentucky bluegrass and creeping bentgrass

Summer Patch of Turf

Algae and summer patch on turf

Affected plants: Kentucky bluegrass and annual bluegrass

Sunscalded Fruit

sunscalded fruit

Affected plants: Tomatoes and peppers

Tomato, Bacterial Spot or Speck

bacterial spot of tomato

Affected plants: Tomato

Tomato, Anthracnose

tomato anthracnose

Affected plants: Tomato

Tomato, Bacterial Canker

bacterial canker of tomato

Affected plants: Tomato

Tomato, Cracking

tomato cracking

Affected plants: Tomato

Tomato, Early Blight and Septoria Leaf Spot

early blight on tomato

Affected plants: Tomato

Tomato, Fruit Not Setting

fruit not setting

Affected plants: Tomatoes and peppers

Tomato, Fruit Slow to Ripen

slow to ripen

Affected plants: Tomato

Tomato Fruitworm

tomato fruitworm

Affected plants: Tomato, sweet corn

Tomato, Fusarium and Verticillium Wilt

fusarium wilt

Affected plants: Tomato

Tomato, Hard Core in Fruit

hard core tomato

Affected plants: Tomato

Tomato Hornworm

hornworm

Affected plants: Primarily tomato but can also attack eggplant, pepper, and potato

Tomato, Leaf Roll

leaf roll

Affected plants: Tomato

Tomato, Spider Mites

spider mites

Affected plants: Many vegetables, tomato

Tomato, Spotted Wilt Virus

spotted wilt virus on tomato fruit

Affected plants: Tomato, pepper, plus many other vegetables and ornamentals

Tomato Stink Bug Damage

stink bugs on tomato

Affected plants: Tomato

Vine Crops Flowering But Not Setting Fruit

watermelon female flower

Affected plants: Cucumbers, Muskmelons, Watermelon, Pumpkins

Tomato, Walnut Wilt

walnut wilt

Affected plants: Tomato, potato, blackberry, apple, lilac, asparagus, chrysanthemum, and peony

Tomato, Warty Stems

warty swtem

Affected plants: Tomato

Termites

termites vs ants

Main impact: wooden structures

Trees, Sunscald on Trunk

sunscald on trees

Affected Plants: Honey locusts, fruit trees, ashes, oaks, maples, lindens and willows and other thin-barked trees

Trees, Controlling Unwanted Trees

tree control

Affected Plants: Volunteer trees

Trees, Lack of Fall Color

lack of fall color

Affected Plants: Maples, oaks and various other trees.

Trees, Verticillium Wilt of Trees

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

winter damage

Affected Plants: Trees

Trees with Cavities

trees with cavities

Affected Plants: Trees

Trees with Mushroom Growth

trees with mushrooms

Affected Plants: Trees

Wetwood and Slime Flux on Trees

bacterial wetwood

Affected Plants: Elms, cottonwood and willow

Twig Girdler

twig girdler

Affected Plants: Elm, hickory, oak, linden, hackberry, apple, pecan, persimmon, poplar, sour gum, honeylocust, dogwood, and some flowering fruit trees