FUNGUS DISEASES. 101 



ounce with six pounds of flour, and dusted lightly 

 over the plants while the dew is on. 



FUNGUS DISEASES. 



There are several parasitic fungi which are more 

 or less destructive to the cauliflower at different 

 stages of its growth. The principal diseases of the 

 cauliflower due to fungi are the following: 



Stem Rot. — This is an old disease, which attacks 

 the cauliflower, cabbage and other vegetables in 

 wet seasons. It has received various other names, 

 such as " consumption," " humid gangrene,'' etc. 

 Professor Comes,* who has studied this disease in 

 Italy, believes it to be the same as the " humid 

 gangrene " which occurs in Germany, and which 

 is there attributed to the parasitic attack of the 

 fungus known as Pleospora Napi. He finds this 



*5w7/. SoG. Bot. France, 1886 {Rev. Bib., p. 128). 

 La cancrena del Cavolo Fiore {La gangrene humide clu 

 Chou-fleur) par M. le Professor O. Comes {Atti del i?, 

 Instituto del incorraggiamento alle Scienzie naturali. 

 — Estratta dal Vol. IV, 3a serie, degli Atti Academici, 

 1885). [The Humid Gangrene of the Cauliflower.] 



"A disease which attacks the crops of cauliflower 

 around Resina and at Torre del Greco, near Naples. 

 The roots of the diseased plants remain sound, or at 

 least appear so, but the subterranean parts of the stem 

 are more or less seriously affected; the bark is disorgan- 

 ized, the wood situated beneath it more or less decom- 

 posed, and the pith destroyed for a variable length 



