Garden Pest and Disease Directory: Identify Problems Naturally

Identify the Problem, Then Choose an Earth-Friendly Solution

The first step in reducing—or even eradicating—garden damage is accurate identification. Check the list below for the most common causes of garden problems. But keep in mind: 95 percent of garden visitors are either helpful or harmless. Beneficial insects include ladybugs, lacewings, and many others. Learn more in Most Bugs are Good Bugs.

Don't forget pollinators. Bees, moths, butterflies, wasps, and beetles all play a role in pollination. Learn more in All About Pollinators.

Common Garden Problem Categories

• Insect Pests: Aphids, caterpillars, beetles, slugs, spider mites, whiteflies, squash bugs, Japanese beetles.
• Plant Diseases: Powdery mildew, blight (early/late), rust, fusarium wilt, botrytis, leaf spots, blossom-end rot.
• Animal Pests: Deer, rabbits, woodchucks, squirrels, voles, moles, raccoons, birds.
• Environmental Stress: Drought, overwatering, nutrient deficiencies, sunburn, frost damage, wind injury, herbicide drift.

Diagnostic Approach

1. Observe daily: Know what healthy plants look like so you spot anomalies early.
2. Examine closely: Check leaf undersides, stems, soil surface. Note holes, spots, discoloration, webbing, slime trails, droppings.
3. Identify the culprit: Is it an insect, disease, animal, or environmental factor? Use a hand lens for tiny pests.
4. Assess severity: Is damage cosmetic or threatening plant survival? Are beneficial insects already present?
5. Choose the least-toxic solution: Physical barriers, traps, biological controls, cultural practices. Reserve pesticides as a last resort.

Accurate identification saves time, money, and prevents unnecessary harm to beneficial organisms. When in doubt, consult your local cooperative extension service or a reputable garden center.