Damage

Damage

Below is a table listing some of the most common types of plant damages and their possible causes:

Possible Causes

Adult or larval stages of beetles (Japanese beetles, Mexican bean beetles and others), grasshoppers, moth larvae (armyworms or hornworms), slugs, snails, animal pests.

Aphids, leafhoppers, tarnished plant bugs, nutrient definciency.

Webworms, obliquebanded leafrollers

Adult flea beetles, plant diseases

Tarnished plant bugs, spider mites, thrips, lace bugs, plant diseases

Thrips

Scales, mealybugs, plant diseases

Larval learminers, sawflies

Aphids, mealybugs, slugs, snails, pear psyllas, scales, spittlebugs, whiteflies, plant diseases

Apple maggots, moth larvae (codling moths, European corn borers)

European corn borers, tarnished plant bugs

Aphids, leafhoppers, spittlebugs, plant diseases

Wireworms, many kinds of beetle grubs, weevils (black vine, carrot, or strawberry root weevils).

Gall wasps, nematodes, plant diseases

Nematodes

Borers (European corn, flatheaded appletree, fruit, peachtree, roundheaded appletree, and squash vine borers).

Japanese beetles, rose chafers

Tarnished plant bugs

Cutworms, animal pests

Damage

Leaves with large, ragged holes

Leaves curled, twisted, puckered, or distorted

Leaves curled, webs present

Leaves with numerous small holes

Leaves spotted

Leaves or stems speckled or silvery

Leaves and stems with hardened bumps, scales, or cottony growth

Leaves with shallow tunnels under leaf surface

Leaves with shiny, slimy, frothy, or sticky coating

Fruit with tunnels throughout

Fruit distorted, twisted

Fruit spotted, sticky

Roots or bulbs with signs of feeding or dead spots

Roots or stems with galls, swellings

Roots or stems with excessive branching

Stems hollowed, with larvae inside and leaves wilted

Flowers eaten

Flowers fall before opening

Seedlings chewed off at soil level

Damage