spruce gall aphids
Adelges spp. Vallot, 1836

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0805052
0805052

Infestation
Edward H. Holsten

0805051
0805051

Damage
Edward H. Holsten

4544046
4544046

Damage
Petr Kapitola

0805085
0805085

Damage
David J. Moorhead

1587083
1587083

Damage
Elizabeth Willhite

0355019
0355019

Damage
Robert L. Anderson

1441103
1441103

Egg(s)
USDA Forest Service - Region 2 - Rocky Mountain Region Archive