. Diseases of economic plants. Plant diseases. considerable damage, causing premature falling of leaves. The rust appears as brown spots upon the leaf. Leaf-blight {Cercospora bol- leana (Thiim.) Speg.). —This blight has been noted in the United States, though but slight attention has been given it. It causes injury similar to that of Fig. 76. — Fig in well-advanced rust, of fruit-rot. Original. Other diseases of the fig are: a Rhizoctonia leaf-blight; a root-knot due to nematodes; Southern-blight (Sclerotium rolfsii); Cankers due to Mac- rophoma, Libertella, and Tubercularia; Limb-blight due
. Diseases of economic plants. Plant diseases. considerable damage, causing premature falling of leaves. The rust appears as brown spots upon the leaf. Leaf-blight {Cercospora bol- leana (Thiim.) Speg.). —This blight has been noted in the United States, though but slight attention has been given it. It causes injury similar to that of Fig. 76. — Fig in well-advanced rust, of fruit-rot. Original. Other diseases of the fig are: a Rhizoctonia leaf-blight; a root-knot due to nematodes; Southern-blight (Sclerotium rolfsii); Cankers due to Mac- rophoma, Libertella, and Tubercularia; Limb-blight due to Corticium; Root-rot (Ozonium) and Yellow-rust {Fusarium). Black-smut ^^^ {Sterigmatocystis) may affect as high as 15 per cent of the fruits in some instances. GUAVA Ripe-rot {Glomerella disease was described from green- house mate- rial collected at Washing- ton, D. C, and after- ward it was reported from Florida and Cali- fornia. The affected fruit shows circular, i (G. Del.) Sheldon). —This. Fig. 77. — Guava affected with ripe-rot. After 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
