360 



Cane-blight 

 or wilt. 



RASPBERRY. 



is very destructive to black raspberries but not often injurious 

 Anthracnose to the red varieties. It is detected by the circular or elliptical, 

 gray, scab-like spots on the canes. Avoid taking young plants 

 from diseased plantations. Remove all old canes and badly diseased new ones as 

 soon as the fruit is gathered. Although spraying with Bordeaux, 

 5_5_5o, will control the malady; it may not be profitable. If 

 spraying seems advisable make the first application when the new 

 canes are 6 to 8 inches high and follow with two more at intervals 

 of 10 to 14 days. See Geneva Bulletin 124. (Fig. 175.) 



This is a destructive disease affecting both red 

 and black varieties. Fruiting canes suddenly 

 wilt and die. It is caused by a fungus which 

 attacks the cane at some point and kills the bafk 

 and wood thereby causing the parts above to die. No successful 

 method of treatment is known. In making new settings use only 

 plants from healthy plantations. Remove the fruiting' canes as 

 soon as the fruit is gathered. See Geneva Bulletin 226. 



is often serious on black- varieties but does not 

 Red-rust affect red ones. It is the same as red rust of 

 blackberry. Dig up and destroy affected plants. 

 This is often destructive, particularly to the red 

 Crown gall or varieties. It is detected by the large, irregular 

 root-knot. knots on the roots and at the crown under- 

 ground. It is a contagious disease. Never set 

 plants showing root-knots. Avoid planting on infested land. The 

 same disease occurs^on' peaches. ^ 



ROSE. 



IM 



is one of the commonest diseases of the rose. 

 Black leaf spot It causes the leaves to fall prematurely. Spray 



with Bordeaux, 5-5-50, beginning as soon as 

 the first spots appear on the leaves. Two or three applications 

 at intervals of ten days will very largely control the disease. 

 Ammoniacal copper carbonate may be used on roses grown under 

 glass. Apply once a week until disease is under control. 



For greenhouse roses, keep the steam pipes 

 Mildew. painted with a paste made of equal parts -lime 



and sulfur mixed up with water. The mildew 

 is a surface-feeding fungus and is killed by the fumes of the sulfur. Out-door 

 roses that become infested with the mildew may be dusted with sulfur or sprayed 

 with a solutionof potassium sulfide, i oz. to 3 gallons water. Spray or dust with 

 the sulfur two or three times at intervals of a week or ten days. 



Pig. 175. i?0J^- 

 herry anthrac- 

 nose. 



STRAWBERRY. 



is the most common and serious fungous disease of the straw- 



Leaf-Spot berry. It is also called^rust and leaf-blight. The leaves show 



spots which are, at first, of a deep purple color, but later enlarge 



