Journal of Agricultural Research . Conidial mats several days old are shown near the periphery, and the zone of activedisease has advanced beyond them. A whitewash solution was applied to the matsto facilitate photographing. The white stakes indicate the furthermost margin ofactive disease the previous year. PLATE 7 A.—Segregated rootrot area i6 days after treatment with formaldehyde. No plantsoutside the original area had died since treatment. B.—Control area of approximately the same original size; the disease had advanced6i cm. in i6 days. C.—The rootrot area shown in Plate 7, A, 60 days af
Journal of Agricultural Research . Conidial mats several days old are shown near the periphery, and the zone of activedisease has advanced beyond them. A whitewash solution was applied to the matsto facilitate photographing. The white stakes indicate the furthermost margin ofactive disease the previous year. PLATE 7 A.—Segregated rootrot area i6 days after treatment with formaldehyde. No plantsoutside the original area had died since treatment. B.—Control area of approximately the same original size; the disease had advanced6i cm. in i6 days. C.—The rootrot area shown in Plate 7, A, 60 days after treatment. No furtherinfection had been observed. D.—The control area shown in Plate 7, B, 60 days after treatment of the infectedspot in A. The disease had increased the diameter of the circle by about 3 order to make it more comparable to the treated area, a dike was thrown up aboutthe stakes which were placed to define the limits of the disease on August 3. Habits of the Cotton^Rootrot Fungus Plate 7 <b.
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Keywords: ., bookauthorassociationoflandgran, bookcentury1900, bookdecade1910
