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Egg Galleries and Larval Mines
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by
USDA Forest Service
Egg galleries and larval mines.
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71 photos
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344 views
1920. Western pine beetle (Dendroctonus brevicomis) galleries in Pinus ponderosa. Sierra National Forest, California.
1923. Tree peeled to show galleries of western pine beetle. Photo also shows the method of tagging and numbering trees for control work. Southern Oregon Northern California (SONC) beetle control project.
1926. Dendroctonus brevicomis work on the surface of sapwood.
1926. Red turpentine beetle (Dendroctonus valens) work in ponderosa pine.
1926. Ponderosa pine tree attacked by Ips emarginatus. Southern Oregon Northern California beetle control project.
1926. Western pine beetle (Dendroctonus brevicomis) work on the surface of sapwood.
1926. Dendroctonus brevicomis work on the surface of sapwood.
c.1930. Platypus wilsoni egg tunnels in wood of Abies concolor.
1934. Three relative degrees of Dendroctonus brevicomis attack; heavy, medium, and light on ponderosa pine.
1934. Xyleborinus sp. galleries in sapwood of Douglas-fir killed by fire. Pack Forest, Washington.
1934. Xyleborinus sp. galleries in sapwood of Douglas-fir killed by fire. Pack Forest, Washington.
c.1934. Drawing shows primary egg gallery, larval mines, and pupal cells of Ips oregoni (Eich.) on surface of sapwood of pine.
c.1934. Drawing shows Ips radiatae Hopk. Egg gallery, larval mines and pupal cells on surface of sapwood of pine.
1934. Drawing by de Young shows the brood stages, work, and life history of the western pine beetle, Dendroctonus brevicomis Lec.
c.1934. Drawing shows some western bark beetles injurious to native and planted trees used for ornamental and recreational purposes.
1934. Drawing shows the brood stages, work and life history of the Douglas-fir beetle. Dendroctonus pseudotsugae Hopk. by artist de Young.
c.1934. Principle types of scolytid bark tunnels: cave tunnel, radiate, and forked. Transverse and longitudinal views.
1934. Types of ambrosia beetle galleries, pith and wood tunnels.
1934. Types of scolytid galleries, pith and wood tunnels.
1935. Western pine beetle (Dendroctonus brevicomis) adults and work in ponderosa pine (Pinus ponderosa).
1935. Western pine beetle (Dendroctonus brevicomis) adults and work in ponderosa pine (Pinus ponderosa).
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.
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.
