USDA Forest Service:
1935. Cover. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1935. Title page. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1935. Page 2. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1935. Page 3. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1935. Page 4. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1935. Page 5. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1935. Page 6. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1935. Page 7. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
c.1933. Western pine beetle infestation at Bass Lake. Sierra National Forest, California.
USDA Forest Service:
1935. Page 8. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1935. Page 9. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1932. Potential lumber turned to snags by western pine beetle. A large group of ponderosa pines which were killed during the summer of 1927. This shows condition of trees five years later. Modoc National Forest, California.
USDA Forest Service:
1935. Page 10. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1934. An area in the Modoc National Forest showing the accumulated loss of ponderosa pine killed by the western pine beetle during a period of ten years.
USDA Forest Service:
1935. Page 11. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1935. Page 12. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1924. These lodgepole pine trees, first weakened by a needle miner, were later killed by mountain pine beetle. Tenaya Basin, Yosemite National Park.
USDA Forest Service:
1935. Page 13. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1935. Page 14. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1935. Page 15. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1935. Page 16. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1935. Page 17. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1935. Page 18. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1935. Page 19. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1935. Page 20. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
1924. Marking a group of infested ponderosa pine. The spotter has blazed 21 trees recently attacked by bark beetles in a heavy center of infestation. Kaibab National Forest, Arizona.
USDA Forest Service:
1935. Page 21. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
c.1921. Cutting down a bark beetle-infested tree for peeling and treatment.
USDA Forest Service:
1935. Page 22. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.
USDA Forest Service:
c.1930. Falling an infested ponderosa pine tree. The undercut shows dark stains in sapwood caused by blue-stain fungi, which develops soon after the western pine beetle attacks the tree. CA..
