Plant Damage
Chewed leaves, cut stems, and mystery plant injuries
Plants can't tell you what attacked them, but the damage pattern can. Insects and animals feed in surprisingly consistent ways: caterpillars chew ragged holes from the leaf surface, adult beetles skeletonize leaves down to the veins, cutworms slice seedlings off at the soil line, and deer tear rather than cut. Whether it happened overnight or built up over weeks matters too. These guides walk you through the most common damage patterns American gardeners find, and what to check before you treat anything.
Plant Damage guides
What Is Eating My Tomato Leaves at Night? Tomato leaves that disappear overnight are most often the work of tomato hornworms, cutworms, slugs, or flea beetles — and if whole branches are gone, rabbits or deer. The size of the bites, whether there are slime trails, and how low on the plant the damage sits will point you to the culprit, and a ten-minute flashlight check after dark usually confirms it. Read the guide → Bark Stripped From Trees: Squirrels, Deer, Voles, or Birds? The height of the damage tells you the most: bark gnawed at ground level is usually voles or rabbits, shredded bark from 1 to 4 feet up is deer rubbing their antlers, and stripped patches on upper branches point to squirrels. Neat horizontal rows of shallow holes are a sapsucker's work — and any damage that circles the whole trunk (girdling) puts the tree at real risk. Read the guide → Flowers Eaten Overnight: Who Raided Your Garden Beds? Flowers that vanish overnight are most often deer or rabbits, and which flowers were taken narrows it fast — tulip and hosta blooms nipped off whole point to deer, while low plants clipped at a clean angle point to rabbits. Petals riddled with ragged holes but still attached usually mean earwigs or slugs working after dark, and shredded rose blooms are Japanese beetles feeding into dusk. Read the guide → Holes in Hosta Leaves: Slugs, Earwigs, Hail, or Deer? Holes in hosta leaves are most often slug feeding — hostas are the slug's favorite plant in the American shade garden, and silvery slime trails confirm it. Earwigs chew similar ragged holes in hot dry spells, hail punches holes with bruised edges all on the same date, and deer skip the holes entirely and eat whole leaves down to the stalks. Read the guide → Holes in My Tomatoes: Which Pest Is Ruining the Fruit? Holes in tomatoes are most often the work of tomato fruitworms (one clean round entry hole), hornworms (large shallow gouges), birds (peck marks in ripe fruit), slugs (rasped pits where fruit touches soil), or squirrels (single bites, fruit carried off). Sunken leathery patches on the bottom of the fruit aren't a pest at all — that's blossom-end rot. Read the guide → Leaves Chewed From the Edges: How to Read the Bite Marks Leaves eaten inward from the edges are usually caterpillars, grasshoppers, or — if the edges show neat crescent-shaped notches — adult weevils feeding at night. When whole leaf sections or stems are missing, the cut itself is the clue: a clean angled snip means rabbits, while ragged torn edges mean deer. Read the guide → Plant Stems Cut Near the Ground: Cutworms or Rabbits? A seedling toppled with its stem severed right at the soil line is the classic signature of cutworms, night-feeding caterpillars that curl in the soil by day. Clean 45-degree cuts a few inches higher point to rabbits, while stems gnawed through at the base — often with the plant left uneaten — suggest voles or, less often, squirrels. Read the guide → Round Holes in Leaves: Bee, Beetle, Slug, or Caterpillar? Perfectly circular holes or half-moon notches cut from leaf edges are almost always leafcutter bees, which are beneficial pollinators that do no lasting harm. Rounded but irregular holes in the middle of leaves point instead to slugs, caterpillars, or — if the holes are tiny and numerous — flea beetles. Read the guide → Seedlings Disappearing Overnight: What's Taking Them? Seedlings that vanish overnight are usually felled by cutworms, eaten entirely by slugs, pulled up by birds, or clipped by rabbits — and sometimes they were killed by damping-off fungus rather than eaten at all. What's left behind decides it: a toppled stem means cutworms, slime trails mean slugs, a pinched wilted stem means fungus, and nothing at all usually means slugs or a bird. Read the guide → Skeletonized Leaves: What Eats Everything but the Veins? Leaves chewed down to a lacy network of veins are usually the work of Japanese beetles or sawfly larvae such as rose slugs and pear slugs. Japanese beetles feed in plain sight in daytime swarms during midsummer, while sawfly larvae hide on leaf undersides and 'window-pane' the leaf from below — and stippled, bleached leaves that aren't actually eaten point to lace bugs instead. Read the guide → Something Digging in Potted Plants? Here's the Likely Culprit Something digging in your potted plants is most often a squirrel burying or retrieving nuts — the number one cause by far — followed by chipmunks, birds taking dust baths, raccoons hunting grubs at night, or a cat using the pot as a litter box. Daytime digging with small neat pits points to squirrels; pots trashed overnight point to raccoons. Read the guide → Sticky Residue on Leaves: Honeydew and What's Making It A sticky, shiny film on leaves is honeydew — the sugary waste excreted by sap-sucking insects like aphids, soft scale, whiteflies, or mealybugs feeding somewhere above the sticky spot. Look up and check leaf undersides to find the source, and don't be surprised if ants are patrolling the plant: they farm these insects for the honeydew. Read the guide → What Is Eating My Pepper Plants? How to Identify the Pest Pepper plants are most often eaten by hornworms, slugs, flea beetles, aphids, or cutworms — and if entire tops or whole plants disappear, rabbits or deer. The pattern of damage tells you which one: tiny pinholes point to flea beetles, big ragged missing chunks to hornworms, slime trails to slugs, and clean angled cuts to a four-legged visitor. Read the guide → White Squiggly Lines on Leaves: Leafminers Explained Those winding white or pale tan trails are made by leafminers — tiny fly, moth, or sawfly larvae that hatch inside the leaf and eat a tunnel between its upper and lower surfaces. The damage looks dramatic but is almost always cosmetic on ornamentals; picking off mined leaves is usually all the control a home garden needs. Read the guide → Yellow Leaves With Brown Spots: Disease, Mites, or Aging? Yellow leaves with brown spots are most often a fungal leaf spot disease, early blight (on tomatoes, with its bullseye-ringed spots), bacterial spot, or spider mite feeding that starts as fine pale stippling. A few yellowing lower leaves on an otherwise healthy plant, though, are usually just natural aging. Where the spots sit, their shape, and whether they have rings or halos point to the cause. Read the guide →
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