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THE GARDEN SAGEA library of living things
Wildlife & landscape pests · Western North Carolina field companion

Spiny oakslug

Euclea delphinii

Spiny oakslug · caterpillar with branching spines
Spiny oakslug · caterpillar with branching spinesMatthew T Rader ↗ · CC BY-SA 4.0
Photo contextPhotograph without handling; the spines can sting.

A small leaf feeder worth recognizing before reaching underneath a branch.

Record
Landscape reference
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In the landscape.

Plants & places

Oaks and several other woody plants.

Recognize the damage

Leaf tissue is eaten from shaded foliage; isolated larvae usually cause limited plant injury.

Before you act

Look without touching underneath low leaves; photograph in place with enough detail to compare the body pattern.

A sensible first response

Avoid bare-hand contact because the spines can sting. Leave isolated larvae undisturbed away from contact areas; plant damage rarely calls for broad treatment.

When to look

Larvae can occur through summer into early fall.

In Western North Carolina

Included for recognition in WNC gardens, not as an insect to eliminate whenever encountered.

Identification, lookalikes & further notes

Identification

A compact greenish slug-shaped caterpillar carries rows of branching spines, often with red accents.

Lookalikes & limits

Other slug caterpillars have different spine patterns. True slugs lack these raised clusters of spines.

In the garden

Leaf tissue is eaten from shaded foliage; isolated larvae usually cause limited plant injury.

What would help next

Record the host plant, date, fresh damage, and a clear photograph of the animal or insect. A damage match narrows the search; it does not establish an identification.

Your margin of the garden.

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