DISEASES OF PLANTS. 827 



leaves, wliicli may be recognized by the dead or discolored spots, should 

 be removed and the remaining foliage sprayed at least once a week 

 with Bordeaux mixture. A leaf blight of caryotas is also described 

 and the same treatment recommended. 



Blights of dracwnas (i)p. 412-414). — A blight, due to Fhyllosticia 

 viaculicoJa, causing small brown angular spots in the leaves, surrounded 

 by yellowish areas, is described. Another blight more destructive to 

 the thick leaved drac?enas is caused by V^rmicularia concentrica. A 

 third disease, a leaf tip blight of Dracxena fragrans, caused by Gloeo- 

 sporium sp., is illustrated and described. The author thinks these dis- 

 eases could be prevented to a great degree by the use of any of the 

 standard fungicides. 



Orchid diseases (pp. 414-419). — Leaf disefises of Sorbralia macrantha 

 and Bletia volutella, and petal blights are described. Care in not propa- 

 gating from diseased plants and use of fungicides are advised as pre- 

 ventive treatment. 



Tip blight of ornamental ferns (pp. 419-421). — Fern blights are 

 described and Bordeaux mixture as a preventive treatment advised. 



Bacteria in some of their relations to crop growing (pp. 422-430). — A 

 reprint is given of a seniipopular paper on bacteria read before the iS^ew 

 Jersey Horticultural Society. 



Bacterial leaf blight of calceolarias (pp. 430, 431). — A disease, due to 

 Micrococcus sp., is described as causing brownish patches on the 

 lower leaves. 



Dropsical pelargoniums (pp.- 432, 433). — Numerous instances are 

 reported of pelargoniums being spotted, but no fungus could be found. 

 The author thinks it probable that the plants were affected by the same 

 cause, resulting in what has been called oedema of tomato.^ Tiie 

 remedy recommended is a cooler, dry soil, with increased light wherever 

 possible. 



Notes on a new Exobasidium (pp. 434-436). — ]^otes are given on Exo- 

 basidium x>eclii, a fungus almost entirely confined to the inflorescence 

 of Andromeda mariana, its attack resulting in abnormally developed 

 flowers. 



Report of the mycologist, F. D. Chester {Delaicare Sta. Rpt. 1893, 

 pp. 103-131, figs. 2). 



Synopsis. — A report is given oa the treatment of peach rot and blight; observations 

 on root rot of criiiisou clover, diseased cowpeas, and authracnose of tomato ; and 

 a report of bacteriological work in various lines, principally in the preparation 

 of attenuated anthrax virus. 



Treatment of plant diseases (pp. 103-100). — Experiments were con- 

 ducted in 2 orchards for the prevention of peach rot and blight. The 

 treatment consisted in (1) winter treatment, the removal of all mummy 

 fruits and washing the trees with a copper sulphate solution ; (2) si)ray- 

 ing twice before the buds opened; (3) spraying with Paris greeu for 



1 New York ComeU Sta. Bui. 53 (E. S. R., 5, p. 55). 



