Pests & diseases

Browse by what you are seeing. For planning context alongside species and what you can grow.

Symptom

All Yellowing leaves Holes / chewed leaves Spots or blotches Wilting / collapse Powdery or white coating Distorted or stunted growth Slime trails / ragged holes low Lacy / skeletonized leaves Seedlings cut or toppled Lawn brown patches

AphidsPest
Small soft-bodied insects that cluster on stems and leaf undersides; honeydew can lead to sticky leaves and sooty mold.
Spider mitesPest
Tiny relatives of spiders; feeding causes stippling (fine pale dots) and, in bad outbreaks, fine webbing.
Cabbage white caterpillars (imported cabbageworm, etc.)Pest
Butterfly larvae chew holes, often with frass (droppings) visible on leaves or in heads.
Tomato / tobacco hornwormPest
Large green caterpillars can strip branches overnight; frass droppings are often visible below plants.
Slugs and snailsPest
Night feeders leave slime ribbons; damage is often ragged and close to soil or mulch.
CutwormsPest
Larvae curl at the soil line and clip stems at night; plants look “cut” and topple.
Japanese beetlePest
Metallic green/bronze adults feed in groups; larvae are white grubs in turf.
Powdery mildewDisease
Fungal growth on leaf surfaces; often white and dusty, sometimes later yellowing.
Early blight (Alternaria) on tomatoDisease
Dark spots with concentric rings often start on older leaves and move up the plant.
Blossom end rot (physiological)Physiological / stress
Brown/black leathery patch on blossom end of fruit; linked to uneven water/calcium uptake rather than a single insect.
Fusarium wilt (tomato) — pattern noteDisease
True vascular wilts show one-sided yellowing and wilting that does not recover overnight.
Summer brown patches in lawn (many causes)Physiological / stress
Brown spots can be drought, chinch bugs, grubs, fungal patch diseases, pet spots, or mower scalping — symptom browsing stops at patterns, not a single diagnosis.