. Annual report of the Maine Agricultural Experiment Station . spruce. Cross section. Fig. 136. Longitudinal 137. Twig of white spruce with galls of Chermes 138. Galls of Chermes abietis from Norway spruce. Longitudinal section of gall which does not enclose the whole twig. Fig. 139. Longitudinal section of gall which completely encircles the 140. Twig of Norway spruce. Show deserted gall of Chermes abietis and the white molted skins along twig and 141. Twig of white spruce with galls of Chermes lariciatus Patch. Gall at right deserted. Gall at l
. Annual report of the Maine Agricultural Experiment Station . spruce. Cross section. Fig. 136. Longitudinal 137. Twig of white spruce with galls of Chermes 138. Galls of Chermes abietis from Norway spruce. Longitudinal section of gall which does not enclose the whole twig. Fig. 139. Longitudinal section of gall which completely encircles the 140. Twig of Norway spruce. Show deserted gall of Chermes abietis and the white molted skins along twig and 141. Twig of white spruce with galls of Chermes lariciatus Patch. Gall at right deserted. Gall at left not yet 142. Galls of Chermes similis Gillette on Norway 143. Apterous flocculent oviparous females of Chermes similis showing white on stem of Norway 144. Twig of black spruce showing injury to young of Chermes similis. Needles sickly yellow and covered with white flocculent secretion of the 145. Gall of Chermes consolidatus Patch on black 146. Chermes pinicorticis Fitch on bark of white
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectagriculture, bookyear
