DISEASES OF CULTIVATED PLANTS 631 



not persistent, but calls for spraying foliage with fungicides when 

 serious. 



Ray Blight. A blight of the rays of chrysanthemum flowers 

 due to a specific fungus (Ascochyta chrysanthemi) is reported from 

 the south and is very liable to be present in Ohio. 



CROCUS. 



Root-Rot. Little study has been made with us of the diseases 

 of bulbous plants, yet we are liable to import those occurring in 

 Europe. The common root infesting fungus, Rhizoctonia, is one of 

 the determined troubles of crocus in France. Microscopic identifica- 

 tion of the trouble should be easy owing to the characters of the 

 fungus. (Ohio E. S. B. 214.) 



HOLLYHOCK. 



Anthracnose. It may attack any part of the plant, and is a 

 serious trouble where it occurs. 



Leaf Blight. This is another fungus disease of the hollyhock. 

 These two diseases of the hollyhock should be amenable to spraying 

 with standard fungicides. 



Rust. On the other hand this recently introduced disease of 

 the hollyhock is much less likely to be prevented by spraying. The 

 rust fungus forms dense patches, spots or sori, on the under side of 

 the leaves. These are commonly about one-sixteenth inch or more 

 in diameter, of grayish-brown color and projecting below the leaf 

 surface, while a minute yellow spot early appears on the upper sur- 

 face of the leaf. Subsequently the diseased leaves drop and by the 

 time the plants are blooming the stem below is bare or disfigured by 

 the remains of the diseased leaves. At the 'Station this rust has been 

 prevalent and the complaint is general respecting the same trouble. 

 It would seem wise to gather and burn all the affected leaves and like- 

 wise the old stems as early as possible. Between anthracnose and 

 rust these popular old flowers are having, at present, a difficult time 

 of it (Ohio E. S. B. 214.) 



LILY. 



Bermuda Lily Disease. The lily disease is characterized by the 

 spotting and distortion of the leaves and usually of the flowers, 

 spotting of the scales of the bulbs, and generally the stunting of the 

 plants. In severe cases the first leaves as they appear above ground 

 are more or less distorted, and are marked with small, yellowish 

 white, often longitudinal, and more or less shrunken spots or streaks. 

 These increase slightly in size, continue to grow paler, and finally 

 collapse, dry out, and turn light brown. Each succeeding whorl of 

 leaves becomes similarly affected, and finally the flowers show the 

 shrunken spots and the distortions. Sometimes badly affected plants 

 are apparently strong, vigorous growers, but usually they produce 

 only one or two small, distorted flowers. 



It often happens that the leaves of a diseased plant are not all 

 affected in the same degree. Several of the lower, middle, or top 

 whorls may be badly diseased, while the others may be comparatively 

 healthy; occasionally the leaves on one side of the stem are much 

 more spotted and distorted than those on the other ; or, as is often the 



