. Diseases of economic plants. Plant diseases. Ornamental Plants 411 AZALEA Leaf-spot (Septoria) is common on the leaves. Gall (Exobasidium sps.). — Leaves, flowers, or shoots are en- larged and distorted. Diseased parts should be cut and burned and the plant sprayed with Bordeaux mixture. BALM, SILVER Rust (Puccinia men- thce Pers.). — Some thirty species of the mint family, including peppermint, thyme, catnip, monarda, are affected by this rust. It is recognized by its sori, which are at first cinnamon-colored, later chestnut-brown. Badly diseased leaves curl and die. Infested refuse should
. Diseases of economic plants. Plant diseases. Ornamental Plants 411 AZALEA Leaf-spot (Septoria) is common on the leaves. Gall (Exobasidium sps.). — Leaves, flowers, or shoots are en- larged and distorted. Diseased parts should be cut and burned and the plant sprayed with Bordeaux mixture. BALM, SILVER Rust (Puccinia men- thce Pers.). — Some thirty species of the mint family, including peppermint, thyme, catnip, monarda, are affected by this rust. It is recognized by its sori, which are at first cinnamon-colored, later chestnut-brown. Badly diseased leaves curl and die. Infested refuse should be burned. BAMBOO Smut (Ustilago shir- aiana Hem.). — The short branches still covered by the leaf sheaths are Fig. 217. — Barberry rust enlarged. After Stakman. Witches-brooms are frequently formed. It has been found in this country on two species of bamboo. Diseased plants should be burned. BARBERRY Rust {Puccinia graminis, Mcidium). — This is of chief interest on account of the damage the other stages of the. 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
