. Bulletin of the Department of Agriculture. Agriculture. j|. 243, U. S. Dept. of Agriculture Plate Fig. 1.—Showing stalks of beetle-killed sugar-pine cones after the cones have fallen from the tree: a, Entrance holes, showing small pitch tube made by beetle. Fig. 2.—A beetle- attacked sugar-pine cone opened to show tunnel and egg gallery of cone beetle: a, Entrace; 6, egg gallery; c, extension of egg gallery to surface where adult emerges. Fig. 3.—Blighted sugar-pine cone opened to show developing broods of cone beetle. Larva and pups as found Julv 9, 1914. Fig. 4.—Blighted sugar-pi
. Bulletin of the Department of Agriculture. Agriculture. j|. 243, U. S. Dept. of Agriculture Plate Fig. 1.—Showing stalks of beetle-killed sugar-pine cones after the cones have fallen from the tree: a, Entrance holes, showing small pitch tube made by beetle. Fig. 2.—A beetle- attacked sugar-pine cone opened to show tunnel and egg gallery of cone beetle: a, Entrace; 6, egg gallery; c, extension of egg gallery to surface where adult emerges. Fig. 3.—Blighted sugar-pine cone opened to show developing broods of cone beetle. Larva and pups as found Julv 9, 1914. Fig. 4.—Blighted sugar-pine cone opened to show position of overwintering adults of cone beetle: a, Cone beetle adults. (Original.) Stages of Cone Beetles in Sugar-Pine Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Department : Supt. of Docs. , Govt. Print. Off.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
