ORNAMENTAL PLANTS 471 



characterized by the appearance of dead, black-bordered 

 spots on the leaves and petals,' thus disfiguring the flowers, 

 and affecting the production of seed, or even bringing pre- 

 mature death to the plant. 



Thorough and frequent spraying with Bordeaux mixture 

 is advocated. 



Fusariose (Fusarium violcB Wolf^). — This was noted 

 as of economic importance in Nebraska, where it caused 

 sudden djang of the plants, apparently healthy plants 

 becoming dry and dead in a few days. Slight sunken 

 areas were evident on the stems just above the ground, and 

 the roots were reduced to mere stimips. 



Rust {Puccinia Violm (Schiim.) DC). — One 'of the 

 most common of pansy diseases is this true rust which 

 affects all aerial parts of the plant. It is recognized by 

 its sori. 



Downey mildew. See violet. 



PEONY 



Botryose [Botrytis peonice Oud.). — This mold was first 

 noted in 1897 in Europe. It has since been mentioned' 

 in Canada, Massachusetts, Rhode Island, Pennsylvania, 

 and Maryland as causing serious loss. 



The plants are attached almost as soon as they appear 

 above ground, and ashen gray spots are produced both 

 upon the bud, scales, and stems. Brown mold similar to 

 that described for lettuce often, but not always, develops 



' Smith, R. E., Bot. Gaz. 27, 203, March, 1899. 

 ' Wolf, F. A., Mycologia 2, 19, .January, 1910. 



^ Patterson, Mrs. Flora, and Charles, Vera K., U.S. Dept. Agr. Birr. 

 Plant Indus. Bui. 171. 



