54 Provincial Board op Horticulture. 1897 



Peach Leaf-curl {Taphrina deformans) is reported from Agassiz, Victoria, Hatzic, New 

 Westminster, and found more or less all through the lower Mainland. 



This disease is much more injurious some seasons than others, owing to differences in 



p hi -f r I c'iiuS'ti'' conditions. It causes the leaves to become curled and misshapen, 



eac Lea - ur . ^^^^ j^^^^ ^^ ^^^^ ^g. -^j^p^ j(_ jg ^g^y severe, the fruit falls prematurely. 



Defoliated trees will usually put out new foliage, but too late to save the crop. 



The No. 1 spraying mixture has been found to give good results, applied in early spring, 



_ ^ ^ before the buds swell. It is recommended to cut off and burn affected parts 

 Treatment. ,. , 



as soon as noticed. 



The disease known as Erisyphe rubi continues to be very destructive in Victoria and 



vicinity to raspberry canes, and in conjunction with root-borers has'' caused the loss of many 



" patches " of 'canes. A fungous disease of the fruit, causing it to turn hard 



Diseased when partly grown, is also reported from Duncan's. In both cases the best 



Canes'"'^'' treatment for the fungous diseases is a free use of the Bordeaux mixture. 



Old canes should be cut out and burnt, as soon as fruiting is over. Spraying 



sliould commence in the spring as soon as growth commences, and be repeated at intervals of 



a week or ten days for three or four applications. 



In setting out new plantations care should be taken to obtain plants free from disease, 

 and cut them severely back when planting to obtain a vigorous growth of new canes the first 

 season. 



Two or three fungous diseases affecting potatoes are known by the common names of 

 Potato Rot and Potato Blight. 



The Early-Blight or Leaf-Spot disease {Macrosporium solani) appears in summer as 



small, brown, brittle spots scattered over the leaves. These spots gradually enlarge, 



and finally run together to form large brown patches, the intermediate 



Potato Rot, &c. tissues becoming yellowish or sickly green colour. The entire plant finally 



withers and dies long before the proper period, the tubers being small, 



generally less than half full size. The tubers do not rot. The spores of this disease winter 



over on the dead vines. The disease is usually confined to a few plants. 



The Downy Mildew or Late Blight {Phytophora infestans) generally appears later in the 

 season, and is most destructive during moist, warm weather. At such times it spreads very 

 rapidly, often entirely destroying the plants in a few days. The tubers are also commonly 

 affected — rotting and giving off a foul smell. 



Treatment. Bordeaux mixture is a preventive of this disease, and several sprayings at 



short intervals should be given. 



Great care should be exercised in the selection of seed tubers, the practice of planting 



small potatoes having apparently led to an increase of the early blight in some cases 



probably from the use of seed grown from infected plants. ' 



Tomato Rot {Macrosporium tomato) is reported from Armstrong and Duncan's and known 



to occur in other districts. This fungous disease causes the blackish spots which form at the 



blossom end of the fruit and destroys the tissues, blackening the inside of the 



Tomato Rot. tomato, and often rendering the fruit worthless. It can be kept in check 



■ . u . • ^ spraying with Bordeaux mixture, but to apply this effectively plants 



hTl't' t'' tt k '" ' ^'"''^'^ *° ^ ''''^^' '*^'"- ^^'^ '""^^''^ ^1'° i^^^«^« tl'^ 



Potato Scab (Ospom scab^s) is reported from Sooke, Victoria, Ladner, and found in 

 most parts of the Province. The fungus-producing scab in potatoes' can usuklly be seen on 



Potato Scab ^^'f '^^ ^T?"^" *"]'^''' '"t *^^ '■'^P"' "^ ^"^^ ^^i*« <^hreads running over the 



Potato Scab, surface It reproduces by means of spores. Repeated experiinents have 



shown that if scabby potatoes are planted a scabby crop may be expected, 



