68 WORCESTER COUNTY HORTICULTURAL SOCIETY. [1896. 



Black-Rot (Laestadia Bidwellii). Attacks most disastrously the nearly 

 mature fruit, which becomes spotted and shrivelled. 



Anthracnose (Spharclima Ampelinum). Attacks the leaves, stem and fruit. 

 Appear as circular brownish dots, with purple margin and ^thitish centre. 



Treatment. — Spraying with the Bordeaux Mixture three or four times 

 during the season has proved very successful for all diseases of the grape. 

 The first application is made before the buds unfold, the last when the fruit 

 has set. Further treatment consists in one application of Ammoniacal Car- 

 bonate of Copper at the time when the fruit commences to color. 



Rose. 



Black-Spot (Actinonema Rosa?). Characteristic blackish spots on the 

 leaves, whitish margin. 



Treatment. — Sulphate of Copper checks the disease if applied early. 



Mildew (Sphaerothua pannom). Whitish mildew growths on the leaves, 

 which causes them to curl. 



Treatment. — Sulphur fumes, and also as a powder is most frequently used. 



Rust (Phungmidium muconatum) and (P. speciosum). Common on out- 

 door roses. 



Treatment. — Spray with Copper Sulphate very early in the Spring. Subse- 

 quent treatments can be made with Bordeaux Mixture. 



Carnation. 



Rust (Urorayus canjophyllium). Attacks the leaves very disastrously. 

 Easily recognized by the elongated ruptured areas containing reddish spores. 



Treatment.— '^o good remedy can as yet be recommended. Although what- 

 ever treatment is applied it must be made before the rust has mtide its 

 appearance. Much trouble can be saved by selecting unsusceptible varieties. 



Two other diseases are common in the Carnation which are known as 

 Anthracnose and Spot. What is stated under treatment for the Rust applies 

 here also. 



Dumping Fungi (Pythium De Baryanum) and (Botrytes vulgaris). These 

 fungi are very common in hot-beds and greenhouses. They can very largely 

 be controlled by conditions of temperature, light, and moisture. 



