Diseases of economic plants (1910) Diseases of economic plants diseasesofeconom00stev Year: 1910 260 DISEASES OF ECONOMIC PLANTS leaf tips by day, followed by night recovery. The wilting becomes more pronounced on succeeding days until in the third or fourth day the leaves wilt permanently, lose color, Fig. IIG.—• Peanut leaf spot cercosporose. Original. dry, and soon fall. These stages may succeed each other so rapidly as to appear almost simultaneous. The roots appear normal; but on the stem near the ground are found shrunken, discolored areas in the bark, often extending considerable o
Diseases of economic plants (1910) Diseases of economic plants diseasesofeconom00stev Year: 1910 260 DISEASES OF ECONOMIC PLANTS leaf tips by day, followed by night recovery. The wilting becomes more pronounced on succeeding days until in the third or fourth day the leaves wilt permanently, lose color, Fig. IIG.—• Peanut leaf spot cercosporose. Original. dry, and soon fall. These stages may succeed each other so rapidly as to appear almost simultaneous. The roots appear normal; but on the stem near the ground are found shrunken, discolored areas in the bark, often extending considerable of the way around the stem. Later the roots may rot from secondary causes.
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