Pine: Pine butterfly
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: Always read and follow label directions when working with pesticides.
For more information on using pesticides visit :
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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
If you choose to use a pesticide, some examples of products that are legal in Washington are listed below. Some products are labeled for just INDOOR or just OUTDOOR use, or may allow both uses. Be sure to choose a product appropriate for your situation. Always read and follow all label directions.
WSU Extension programs and employment are available to all without discrimination.
Evidence of noncompliance may be reported through your local Extension office.