. Wilt disease of cotton, watermelon, and cowpea (Neocosmospora nov. gen.). which wilted and died early in the growing season. Many plants were stems were 2 feet tall and about 1 inch in diameter at the base. The woodwas much browned the whole length of the stem. J. Macroconidia from external conidia beds on dead okra 2:»lants. James C, July 25,1895. The mature spores measured 27 to 42 by 3 to 5 //. Occasionallyone was 5-septate. The vessels and parenchyma of these plants contained a greatamount of mycelium bearing such spores as are shown in 4. 6. Highly magnified cross
. Wilt disease of cotton, watermelon, and cowpea (Neocosmospora nov. gen.). which wilted and died early in the growing season. Many plants were stems were 2 feet tall and about 1 inch in diameter at the base. The woodwas much browned the whole length of the stem. J. Macroconidia from external conidia beds on dead okra 2:»lants. James C, July 25,1895. The mature spores measured 27 to 42 by 3 to 5 //. Occasionallyone was 5-septate. The vessels and parenchyma of these plants contained a greatamount of mycelium bearing such spores as are shown in 4. 6. Highly magnified cross section of a pitted vessel which is beginning to be occu-pied by the melon fungus. Stem of watermelon. Monetta, S. C, June 26, drawing from a fresh section examined in water. A great many of the ves-sels were plugged solid by the fungus, as if stuffed with cotton. For the location ofthese fungus-infested vessels with reference to other parts of the stem see Plate IV. Figures transferred to the plate by Mr. Williams Welch from camera drawings bythe Fungus of the Cotton, Okra, and Melon Wilt. DESCEIPTIOX OF PLATE VI. Healthy melon vines. Monetta, S. C. June 28, 1894. For comparison with thephotographs shown on the following plate, which were made at the same time andfrom the same field. The vine in the foreground had about 200 leaves and a melonthree-fourths Bull. 17, Div. Veg. Phys. & Path., U. S. Dept. of Agriculture Plate VI.
Size: 1215px × 2057px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1800, bookdecade1890, bookpublisherwashingtongpo
