Archive image from page 44 of Damping-off in forest nurseries (1921). Damping-off in forest nurseries dampingoffinfore00hart Year: 1921 Bui, 934, U. S. Dept. of Agriculture. Plate I Pythium debaryanum from Artificial Cultures. Fig. 1.—Hyphae, showing old portions of hyph:« and false septa separating them from the portions still containing protoplasm. Figs. 2 to 4.—Various stages of oospore formation. Figs. 5 to 8.—Hyphal swellings at points of contact with glass. From camera-lucida drawings.

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