. Diseases of economic plants. Plant diseases. 190 DISEASES OF ECONOMIC PLANTS Foot rot, mal-di-gomma (Fusarium Limonis Briosi).— The first symptoms of the disease are abundant exuda- tions of gum upon the trunk of the tree; at the same time the bark becomes brownish in patches, which are thrown off and other patches come. The tree appears as though it does not secure sufficient nourishment, the leaves becoming yellow, scanty, and smaller than usual. Though the trees bear considerable fruit, the amount of damage in Florida is estimated at $100,000 annually. No treatment has proved satisfactory
. Diseases of economic plants. Plant diseases. 190 DISEASES OF ECONOMIC PLANTS Foot rot, mal-di-gomma (Fusarium Limonis Briosi).— The first symptoms of the disease are abundant exuda- tions of gum upon the trunk of the tree; at the same time the bark becomes brownish in patches, which are thrown off and other patches come. The tree appears as though it does not secure sufficient nourishment, the leaves becoming yellow, scanty, and smaller than usual. Though the trees bear considerable fruit, the amount of damage in Florida is estimated at $100,000 annually. No treatment has proved satisfactory. FIG Fruit rot (Colletotrichum Carica S. & H.). — This disease was first described in 1909 by the authors. A rot due to an undescribed species of Collectotrichum, and possibly identical with this, was re- ported from Louisiana in 1907. Fruit rot is easily recog- nized by the sunken, rotten, more or less circular fruit spots, nearly always covered with a white mass of fungous mycelium. As they grow older they produce numerous pustules of the salmon-pink color characteristic of the spores. The amount of damage caused is very great by reason of premature falling of the fruit, at times destroying the whole of the Fig. 83. — Fig in well-advanced stage of fruit rot. 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- joint author. New York, The Macmillan Company
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Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1910, bookyear1910
