. Bulletin. Agriculture. Bui. 1107, U. S. Dept. of Agriculture. Plate Fig. 1.—Two sections showing exit holes through varnished and painted areas. ^= var- nished section, to two-thirds of which was applied, at intervals before emergence, 5 coats of spar varnish. Forty-six beetles emerged through varnished area and 11 in unvarnished portion. -B=white-paint enamel section, to three-fourths of which was applied one good coat of this paint. Thirty-seven beetles emerged through the painted area and 18 through the un- painted portion. These experi- ments, as in most cases, gave no material che
. Bulletin. Agriculture. Bui. 1107, U. S. Dept. of Agriculture. Plate Fig. 1.—Two sections showing exit holes through varnished and painted areas. ^= var- nished section, to two-thirds of which was applied, at intervals before emergence, 5 coats of spar varnish. Forty-six beetles emerged through varnished area and 11 in unvarnished portion. -B=white-paint enamel section, to three-fourths of which was applied one good coat of this paint. Thirty-seven beetles emerged through the painted area and 18 through the un- painted portion. These experi- ments, as in most cases, gave no material check to the beetles' emergence. One-half natural size. (Table 4, Nos. 5 and 12.) Photograph by R. D. Hartman. Fig. 2.—First thickness of lead sheathing after being removed from infested section. Previ- ous to the lead being wrapped around the section about one- half of underside (A) was given 5 coats of spar varnish and 3 coats on infested section. Be- sides these numerous coats of varnish some beetles were able to penetrate 5 thicknesses of No. 3 lead and emerge. Two- fifths natural size. (Table 3, No. 56.) Photograph by R. D. Hartman. 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 : Dept. of Agriculture
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectagriculture, bookyear
