262 SUCCESSFUL FRUIT CULTURE 



Light rains or misty weather are especially favorable to 

 its growth, but heavy rains wash off the spores and are 

 therefore preventive. Such varieties containing foreign 

 blood as the Delaware, Brighton, Rogers Hybrids, etc., 

 are especially subject to this disease and the next. 



Remedy — First, do everything possible to insure a 

 vigorous, strong vine, then spray with the bordeaux 

 according to the calendar. 



Potvdery Mildew (Uncinula spiralis) — This fungus 

 is similar to the last in its effect upon the leaves and 

 stems of the grape, and sometimes attacks the fruit, but 

 it does not appear, generally, until late in the season. 

 It is darker gray in color and often covers over every 

 part of the leaf and young cane. 



Remedy — Where this pest is abundant spraying 

 must be done the last of August and early September 

 with the simple solution of copper sulphate, four ounces 

 to fifty gallons of water, and repeated once or twice if 

 heavy rains wash it off. The bordeaux mixture cannot 

 be used at this time, as it would disfigure the fruit by 

 adhering to the stems. 



FUNGOUS PESTS ATTACKING THE RASPBERRY 



Anthracnose, Cane Rust {Gloeosporium venetum) 

 — Similar to the anthracnose of the grape, appearing in 

 June and July and attacking the new canes principally, 

 but sometimes the leaves also. On old plantations it 

 is more destructive than on those recently planted. 



Remedy — The free use of the bordeaux mixture 

 once before the leaves unfold and once or twice after 

 the leaves have opened, but before the fruit has set, will 

 control this disease. 



Leaf Blight, Leaf Spot (Septoria rubi) — This 

 disease appears the latter part of summer in the form 

 of small, light brown spots, attacking the lower leaves 

 first and working toward the top of the canes, so that 



