. Contributions from the Hull Botanical Laboratory. Plants. Fusarium in Tuber Rot and Wilt of Potato 17 On March 15 the following notes were taken. Series A: plant 1, slight curling of leaves; 2, apparently sound; 3, curling of leaves; 4, curling of leaves. Series B: plant 1, drooping leaves; 2, lower leaves drooping, upper leaves drying; 3, apparently sound; 4, apparently sound. Series C: plant i, apparently sound; 2, some wilting; 3, some wilting; 4, some wilting. Series D: plants 1,2, and 3 apparently sound; 4, wilting. By March 21 the plants. A B Fig. 3.—Wilt produced in laboratory with Fu
. Contributions from the Hull Botanical Laboratory. Plants. Fusarium in Tuber Rot and Wilt of Potato 17 On March 15 the following notes were taken. Series A: plant 1, slight curling of leaves; 2, apparently sound; 3, curling of leaves; 4, curling of leaves. Series B: plant 1, drooping leaves; 2, lower leaves drooping, upper leaves drying; 3, apparently sound; 4, apparently sound. Series C: plant i, apparently sound; 2, some wilting; 3, some wilting; 4, some wilting. Series D: plants 1,2, and 3 apparently sound; 4, wilting. By March 21 the plants. A B Fig. 3.—Wilt produced in laboratory with Fusarium oxysporum, and control plant; A, control, Early Ohio variety; B, wilting of lower leaves and curling of upper leaves, 4 days after inoculation, Early Ohio variety. infected with F. oxysporum showed a pronounced folding upward of leaves on the midrib, wilting and rolling on the margins of the leaves, the folding being most pronounced in the tips of the plants. The plants affected least showed discoloration on the margins, which at times was of a yellowish tint, at times purplish to violet. The leaves of plants most severely affected showed a yellowing and burning of the leaf margins. One plant, inoculated with F. oxyspo- rum, developed a pronounced rosette, but overcame this later, grow- ing into quite a normal plant (figs. 4 and 5). These symptoms remind one forcibly of certain symptoms of the leaf-roll disease which has received so much attention, and which has been made the subject. 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 Hull Botanical Laboratory. [Chicago : University of Chicago Press
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectplants, bookyear1895
