defoliation due to unknown cause

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    Damage (8)
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Image Descriptor Description
5395487 Symptoms
5474436 Damage
4212099 Damage
5395301 Damage
5382348 Damage
5382349 Damage Aerial view of aspen defoliation due to unknown agent
5382350 Damage Aerial view of aspen defoliation due to unknown agent  
5382351 Damage Aerial view of defoliation by an unknown agent
2122023 Damage Aerial view of defoliation of quaking aspen, Rio Grande National Forest, CO. Causal insect is unknown.

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