. Diseases of economic plants. Plant diseases. 156 Diseases of Economic Plants often quite destructive. It was first observed by Beach in New York in 1892. Usually the leaves are the parts first attacked. Here large, translucent patches, brown in color, are produced. These spots later dry, become papery in texture, and rup- ture, leaving the foliage ragged and torn. Later infection spreads to the pods, which develop watery, ulcer-like spots without definite boundary, similar to those upon the leaves, though often amber-coated. Attack upon young pods kills Fig. 83. — Blight of bean leave
. Diseases of economic plants. Plant diseases. 156 Diseases of Economic Plants often quite destructive. It was first observed by Beach in New York in 1892. Usually the leaves are the parts first attacked. Here large, translucent patches, brown in color, are produced. These spots later dry, become papery in texture, and rup- ture, leaving the foliage ragged and torn. Later infection spreads to the pods, which develop watery, ulcer-like spots without definite boundary, similar to those upon the leaves, though often amber-coated. Attack upon young pods kills Fig. 83. — Blight of bean leaves. After Fulton. This disease is carried over the season largely by infected seed and is conveyed from plant to plant in the field by insects. Diseased seed and seed from fields bearing the disease should be avoided, and clean culture, including the burning of all infected plant parts, should be practiced. The follow- ing list shows the variation in resistance, the least susceptible being placed first and the most susceptible last: Schindler's Round Pod Wax, Refugee Wax Burpee's White Wax, Grenell's Rust-proof Golden Wax, Wardwell's-Kidney Wax, Dwarf German Black Wax, Early 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, bookdecade1920, bookyear1921
