Pine: Pine butterfly
categories: Conifers Ornamentals Pine Pine Insects
last review date: 2025-07-31 02:48
Photo by: Unknown
Biology
The larva of the pine butterfly is a dark green caterpillar with white stripes on the sides and a black head. The caterpillars feed on the needles, hatching out when new needles begin to appear.
Young larvae feed in clusters on the older needles, while older larvae feed singly. They cause relatively little damage except in years of severe outbreaks.
Adult pine butterflies are white with black markings and closely resemble the cabbage butterfly. The preferred host tree is ponderosa pine.
Management Options
See "Using Integrated Pest Management (IPM) in the Landscape" for successful problem management techniques.
Non-chemical Management
Select non-chemical management options as your first choice!
- Remove and destroy caterpillars by hand to control minor infestations.
- Prune and destroy branches with large clusters of feeding larvae, when practical.
Chemical Management
IMPORTANT: Visit Home and Garden Fact Sheets for more information on using pesticides.
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Apply when caterpillars are present.
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Homeowners should not make foliar applications to trees over 10 ft tall.
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Consult a commercial pesticide applicator for treatment of trees and shrubs over 10 ft. tall.
Approved Pesticides
Examples of pesticides that are legal for home use in Washington State are listed below.
The list may not include all products registered for this use.
WSU Extension programs and employment are available to all without discrimination.
Evidence of noncompliance may be reported through your local Extension office.