Infestation of tent caterpillars, recovery of cottonwoods near South Entrance. ; ZION Museum and Archives Image 105_03_001 ; ZION 8872
Insect control - spraying for tent caterpillars. ; ZION Museum and Archives Image 105_03_002 ; ZION 7262
Workers spraying insecticide on cottonwoods from truck. ; ZION Museum and Archives Image 105_03_003 ; ZION 7362
Witch's broom deformity (caused by midges) on yellow pine. ; ZION Museum and Archives Image 105_03_004 ; ZION 13493
Two Civilian Conservation Corps (CCC) workers on West Rim Trail peeling and burning bark on downed ponderosa to control bark beetle infestation. ; ZION Museum and Archives Image 105_03_005 ; ZION 13458
Civilian Conservation Corps (CCC) worker holding large saw near ponderosa downed for insect control on West Rim. ; ZION Museum and Archives Image 105_03_007 ; ZION 13460
Insect control in Zion Canyon, spraying cottonwoods. ; ZION Museum and Archives Image 105_03_008 ; ZION 10319
Workers spraying insecticide on cottonwood trees in Zion Canyon to combat tent caterpillar infestation. ; ZION Museum and Archives Image 105_03_009 ; ZION 13464
Sapsucker damage to ponderosa trunk. ; ZION Museum and Archives Image 105_03_010 ; ZION 13541