Fungus Parasites 127 



stances in suspension, it is essential for success to have the 

 mixture carefully made as prescribed and thoroughly stirred 

 up before using. 



For plants with very delicate foliage, the formula may be 

 varied to "two, two, fifty." A number of other combina- 

 tions are used by experts for specific plants and purposes, 

 but the one given will suffice for general practice. 



The mixture is appHed in a mist-like spray (hence the 

 importance of avoiding, lumps of lime in the mixture by 

 straining) by the same spraying apparatus and in the same 

 manner as described later on for use with the insecticides, 

 and, indeed, the addition to the Bordeaux mixture of five 

 ounces of Paris Green (mixed to a paste in water) will answer 

 to keep away both kinds of parasites. 



The first application should be made shortly before, or 

 just as the buds open, and again two or three weeks later. 

 If rainy weather prevails — washing off the remedy and 

 encouraging fungus growth — a third application may be / 

 necessary. 



Indeed, this excellent disinfectant may be used as freely 

 for trees as listerine or ammonia in the household, bringing 

 about the general disinfection of branches, trunks and 

 wounds as well as of leaves, and even the roots may be bene- 

 fited. But spraying should never be applied to plants in 

 flower, as the spray is almost sure to injure the blossom, 

 and it should preferably not be done in rainy weather, as 

 this has also been found to injure foliage and fruit. ^ 



As many of these fungi pass the winter either in or on old 

 leaves, the burning of these in the fall or early spring is a 

 means of keeping them in check; the removal of the fitter, 

 therefore, although, as we have seen, detrimental to soil 

 conditions, has an advantage in preventing fungus and insect 

 development. 



