120 POPULAR FRUIT GROWING. 



Red Orange Rust (Oymnoconia interstitiatis) is most harm- 

 ful to the Black Cap raspberries, though it frequently injures 

 blackberries, dewberries and allied plants. It produces a 

 weak appearance in the canes and foliage, and in the latter 

 part of the summer the under side of the foliage 

 becomes completely covered with a thick coat- 

 ing of orange colored spores, which easily rub off. 

 •^Jl One soon learns to know the plants that are dis- 



eased, even before the spores appear, and they 

 should be pulled and burned at once. This is es- 

 pecially neecessary with the black-cap varieties; 

 but even with these, if the affected plants are 

 destroyed, the disease may generally be kept in 

 check until a new plantation can be well started, 

 and sometimes assiduous attention to pulling and 

 burning results in stamping out the disease. 

 iiQ^»i Crown Gall is sometimes injurious to the rasp- 



" * " berry the same as to the blackberry, but it is sel- 

 dom very injurious at the North. In selecting 

 new sets care should be taken to avoid those from 

 infested fields. 



Cane Rust or Anthracnose fGloesporium neca- 

 tor) manifests itself on the raspberry by small 

 purplish spots, which may spread and form whit- 

 ish patches with purplish edges. The tissue is 

 killed out under the spots. It affects raspber- 

 rust "on^r^^sp! ries generally, but the purple and cap varieties 

 berries. are most liable to its injury. 



Remedy. — The best treatment is to spray the canes before 

 the leaves start with thick Bordeaux mixture. The badly dis- 

 eased canes should be cut out at pruning time and only resistant 

 varieties planted. Spray the new growth in the spring once or 

 twice. There is a great difference in the power of different varie- 

 ties to resist this disease. 



Diseases of the Gooseberry and Currant. 

 Mildew (Sphaerotheca morsuvae) is the worst disease of 

 the gooseberry. It attacks the foliage which, as a result, be- 

 comes covered with a whitish mould. Later the leaves dry up 



