. Diseases of economic plants . Plant diseases. FORAGE CROPS 385 brown. Each spot bears several light brown pycnidia visible on both surfaces of the leaf. Dodder (Cuscuta). — Dodder, or love vine, is a parasitic flowering plant. It consists of yellow, threadlike stems which coil closely around the alfalfa stems, and take nour- ishment from them. It reproduces by seed, and the seed may readily pass with alfalfa seed unless very carefully in-. 1 2 3 Fig. 164. — 1, Alfalfa seed ; 2, seed of large seeded dodder ; 3, seed of small seeded dodder, natural size. After Stew- art and others. spected. Th
. Diseases of economic plants . Plant diseases. FORAGE CROPS 385 brown. Each spot bears several light brown pycnidia visible on both surfaces of the leaf. Dodder (Cuscuta). — Dodder, or love vine, is a parasitic flowering plant. It consists of yellow, threadlike stems which coil closely around the alfalfa stems, and take nour- ishment from them. It reproduces by seed, and the seed may readily pass with alfalfa seed unless very carefully in-. 1 2 3 Fig. 164. — 1, Alfalfa seed ; 2, seed of large seeded dodder ; 3, seed of small seeded dodder, natural size. After Stew- art and others. spected. The parasite is absolutely ruinous to the portions of the field that are infected by it, and, since it spreads rapidly, it is a very serious enemy. Badly infected fields should be plowed up. If fields are infected in only a few spots, these spots may be dug over or burned over before the dodder ripens its seed, using kero- sene and straw to insure heat sufficient to kill every in- fected plant, and a margin of a few feet entirely around the infected spot. BLUEGRASS Rust (Pucdnia Poarum Niels).—The uredo of this rust takes even greater prominence than does the uredo of 2c. 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 Stevens, Frank Lincoln, 1871-1934; Hall, John Galentine, 1870-. New York : Macmillan
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Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1910, bookyear1910
