66 WORCESTER COUNTY HORTICULTURAL SOCIETY. [1896. 



Bacterial-Blight. Develops throughout the plant, which causes it to wilt 

 and die. 



Treatment. — Bordeaux Mixture is a remedy for the three preceding diseases. 

 When applied every two weeks it has given an increase of 65 per cent, in the 

 yield over that of the untreated. 



Scab (Gospora scabies). Occurs on the tuber as a corky growth. 



Treatment. — Soak seed potatoes for 1^ hours in a solution of Corrosive Sub- 

 limate in water of the strength of one per cent, or 1-1000 parts, after which 

 allow them to dry, then cut and plant. This treatment kills all of the spores 

 and the solution can be used over and over again. Inasmuch as Corrosive 

 Sublimate is exceedingly poisonous, care must be exercised in handling, and 

 only wooden vessels should be used for the solution. Other preventative 

 measures are : Plant in soil free from scab. Use seed free from scab. Not use 

 manure where scabby potatoes have been fed to stock. Use fertilizers. Dig 

 early. By using these precautions 98 per cent, of the potatoes have been 

 saved from scab. 



Tomato. 



Black-Rot (Macrosporlum Tomato), (Fusarium Solani). Occurs in the 

 fruit in the form of large brownish-colored, decayed spots. 



Treatment.— Experiments in which the plants were treated with the Bor- 

 deaux Mixture have resulted in a saving of all but four per cent., whereas 

 similarly untreated plants showed a loss of sixty per cent. 



Scab (Cladosporium fulvum). Common on greenhouse tomatoes where it 

 occurs as largo, brownish or purplish downy spots, on the under side of the 

 leaf. 



Treatment. — Bordeaux Mixture recommended. 



Celery. 



Leaf-Blight (Cercospora Apii). First appears as small, yellowish spots 

 upon the leaves, which finally enlarge and run together, causing the leaves to 

 turn yellow and brown, and eventually killing them. 



2\eatment. — Grow in moist locality. In case the disease occurs under these 

 circumstances, apply some standard fungicide (Bordeaux Mixture) during 

 the younger stages of development of the plant. 



Leaf-Spot (Septoira Petroselini, var. Apii). Characteristic watery spots 

 occur on the leaves, which eventually assume the form of black dots. Com- 

 mon in hot-bed plants. 



Treatment. — As in the preceding. Select unspotted seed. 



Strawberry. 



Leaf-Spot (Sphaerella Fragariae). Small purplish or reddish spotted leaves. 



Treatment. — Spray the plants with the Bordeaux Mixture very early in the 

 spring, and again when the blossoms open. After harvesting the fruit the 

 old foliage can be removed and destroyed. 



Pear. 



Leaf-Spot (Entomosposium maculatum). Attacks the leaves, stems and 

 fruit. Occurs on the leaves as reddish brown spots which eventually cover 

 large areas, and often defoliating the tree, and upon the fruit as reddish spots 

 which later turn dark. Also attacks the Quince. 



