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Strawberry Pests and Bug Damage: Causes & How to Fix It

Holes in the leaves of your strawberry, tiny insects crowded on the undersides, white flies rising when the plant is shaken, or seedlings cut off overnight. Even when you cannot see the insect, the shape of the damage narrows down the culprit.

Check these first

  • What shape is the damage: round holes, only veins left, white trails, or a pale stippling?
  • Where are the insects or droppings: under the leaves, on new shoots, or at the base?
  • If nothing is visible by day, check at night or early morning for cutworms and slugs.

Most likely causes

From the pests and diseases recorded for this plant, the ones whose symptoms match, most serious first. Symptoms alone rarely confirm a cause, so use the linked page to check the signs and treatment.

Spider Mites

Fine white stippling spreads across the upper leaf surface, and the leaf eventually whitens and dies back. In heavy infestations fine webbing appears on leaf undersides and shoot tips.

How to identify and treat: Spider Mites

Slugs

Irregular holes are chewed in leaves and fruit with glistening slime trails nearby. By day they hide under pots and bricks or in dead leaves at the base of the plant.

How to identify and treat: Slugs

Thrips

Silvery white to brown scarring spreads over leaf and fruit surfaces. Flowers discolor and drop, and fruit is left with keloid-like scar tissue.

How to identify and treat: Thrips

Other possible causes

  • Scarab Grubs — The plant wilts despite watering and growth halts abruptly. Lift the plant and there are a…
  • Pillbugs — Cotyledons and the stem base of young seedlings are gnawed and the seedlings disappear. Fr…
  • Root-knot Nematode — The plant wilts in the daytime and does not recover with feeding or watering. Pull it up a…
  • Root-lesion Nematode — Elongated blackish brown necrotic lesions form on the root surface and fine roots rot away…

Other symptoms on this plant

What other growers did about it

A page like this one can tell you what strawberry pests and bug damage is and what to try. What it cannot tell you is what actually happened to someone who had it on the same plant, at the same point in the season, and what they did next.

Gadenin is a free garden journal built around that. You photograph the plant, tag what you are seeing, and the entries line up by date for each plant you grow.

  • Tag the problem and the app tells you how many other growers have logged the same thing on the same plant.
  • Growers who make their records public can be followed, so you can read what they did and how it turned out.
  • Next season your own entries come back at the same point in the year, so you check the plant before it starts.

Free on iPhone. Recording, tagging and reading public records cost nothing.

Read next

Log when you spotted the pest and what you sprayed or removed by hand. Next year you will know when to start checking.

See what other growers did about it

Log it in the free Gadenin app and tag what you are seeing. Your photos line up by date so you can tell whether it is spreading, and you can see how many other growers have logged the same problem on the same plant, follow them and read what they did next.

Free on iPhone. Android coming later.

Gadenin free garden journalGet the app