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Bagworm damage
(John Obermeyer, Purdue University) |
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Common Name: Bagworm - damage
See also: larva Scientific Name: Psychidae: Thyridopteryx ephemeraeformis Status: common pest of evergreens and shrubs Damaging Stage: caterpillar Injury: Bagworms prefer juniper, arborvitae, spruce, pine, and cedar but also may attack deciduous trees. They can cause severe damage to trees and shrubs as they defoliate the branches. Action Threshold: Control should be considered if more than 20 bagworms are found on each frond or if plants are especially valuable or susceptible to injury. Management: Bagworms can be physically picked off of tree branches in the case of a light infestation. When bagworm populations are above the action threshold, both biological and chemical control options are effective. Treating when the bagworms are very young (early June) is most effective. |
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