. Bulletin. Agriculture. CAUSE OF THE DISEASE. 15 loosely a covering of chiffon or silk veiling; then over that one of Brussels netting (figs. 4 and 5). The chiffon is impenetrable to the insects, but will not withstand the weather; the Brussels net. Fig. 4.—Isolation cage and Mason jars for isolating sugar-beet plants. is strong, but will exclude nothing smaller than adult leafhoppers; therefore both materials were used together. These covers were drawn well down the sides of the foundation frames and secured. Please note that these images are extracted from scanned page images that may have
. Bulletin. Agriculture. CAUSE OF THE DISEASE. 15 loosely a covering of chiffon or silk veiling; then over that one of Brussels netting (figs. 4 and 5). The chiffon is impenetrable to the insects, but will not withstand the weather; the Brussels net. Fig. 4.—Isolation cage and Mason jars for isolating sugar-beet plants. is strong, but will exclude nothing smaller than adult leafhoppers; therefore both materials were used together. These covers were drawn well down the sides of the foundation frames and secured. 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. Bureau of Plant Industry. Washington : G. P. O.
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Keywords: ., bookcentury1900, bookdecade1900, bookpubl, booksubjectagriculture
