SPRAYING 53 



does not turn on the amount of solution poured over a 

 plant, but on the amount of the solution that adheres to 

 the foliage, therefore the periods indicated for a renewal 

 of the operation must of necessity be modified according 

 to circumstances. A heavy rain following spraying would 

 wash off the greater portion of the fungicide at once, 

 and to wait for ten days before repeating the spraying 

 under such circumstances would evidently be courting 

 disaster. 



It has been suggested that mixing a small quantity of 

 dessicated white of egg or dried blood with a fungicide 

 greatly adds to its adhesive property. 



When fruit is commencing to ripen, spraying should 

 cease, otherwise the fruit is liable to become spotted, and 

 its market value consequently depreciated. 



Lodeman, The Spraying of Plants, Macmillan and Co., 

 1896. 



FUNGI 



PHYCOMYCETES 



SEEDLING CABBAGE DISEASE 



(Olpidium brassicae, Dang. 

 Chytridium brassicae, Wor.) 



Young cabbage plants are frequently destroyed by this 

 fungus when growing in damp, shady places. The stem 

 is attacked and the plant droops, and then falls over 

 and dies. 



The fungus consists of a single cell, and sometimes two 

 or three are located in one of the cells of the host. The 



