Pest and Disease Guides

The Old Farmer’s Almanac Garden Plant Pest and Disease Control Library has information on identifying and controlling your most common insect pests and critters—from aphids and hornworms to rabbits and deer. We also address plant disease from blights to wilts.

The first step is to identify the problem! The second step is to control it! Let’s get started.

Indoor Pests Plant Diseases Garden Pests Non-Insect Pests

Indoor Pests

Ants

A Close up of a Bed Bug (Cimex lectularius)

Bed Bugs

Fleas

fungus gnat on a plant leaf

Fungus Gnats

Silverfish

Plant Diseases

Anthracnose

Blossom-End Rot on Tomatoes

Blossom-End Rot

Downy Mildew

Early Blight

Bacterial burn on young apple tree branches in the garden. g

Fire Blight

Fusarium Wilt

Gray Mold

Late Blight on Tomato Plant

Late Blight

Mosaic Viruses

powdery mildew plant disease on a yellow summer squash plant and leaves

Powdery Mildew

Rust Plant Disease

White Mold

Garden Pests

Chiggers (Mites)

green aphids crawling on a plant

Aphids

Armyworm on leaf

Armyworm

Cabbage Looper Moth Caterpillar (Trichoplusia ni) on a green and red succulent leaf.

Cabbage Looper

Cabbage Root Maggots

cabbage worm on a cabbage leaf

Cabbage Worms

colorado potato beetle

Colorado Potato Beetles

Cucumber Beetles

Cutworms

Earwigs

Fire Ant on a plant

Fire Ants

Flea Beetles

Japanese Beetles

Leaf Miners

Leafhoppers

Mexican Bean Beetles

Scale Insects

Slugs & Snails

Spider Mites

Spittlebug Foam on Flowers

Spittlebugs

Squash Bugs

Squash Vine Borer

Stink Bugs

Thrips

Tomato Hornworms

whiteflies and whitefly eggs on a green leaf

Whiteflies

Non-Insect Pests

Crows

Deer

a woodchuck/groundhog in the garden

Groundhogs

Mice

Moles

Rabbits

Raccoons

A skunk, black feathers and white stripes running from the body to the tail, walk on a wooden table.

Skunks

grey squirrel on a green lawn

Squirrels

Voles

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