438 State Horticultural Society. 



with small irregular spots having a greyish center and a deeply colored 

 border. Somewhat similar spots appear upon the stems. On the fruit 

 small black specks are produced, which are only immature forms of the 

 fungus. Within these spots on the stems and leaves the spores are 

 borne in small hollow receptacles. These are thought to carry tlie 

 disease over the winter season. 



Bordeaux is a good preventative for this disease. It should be 

 used three of four times after transplanting at intervals of three weeks. 



LEAF BLIGHT OF BEETS. 



Cercospora Ceticola Sacc. 



This leaf blight is a common disease on the leaves of the beet. It 

 produces small roundish spots with white centers and purplish borders. 

 Spores are produced on small filaments which arise within these spots. 

 These probably carry the disease through the winter. All infected plants 

 should be carefully destroyed. Bordeaux mixture should be used fre- 

 quently through the growing season. 



STERILE-FUNGUS, ROT OF THE BEET. 



Species of Rhizoctonia. 



This is one of the common rots of garden plants, attacking beans, 

 beets, carrots, celery, lettuce, potatoes, radishes, rhubarb cabbage cauli- 

 flower and asparagus. It thrives best during hot, damp weather. On the 

 beet it attacks the leaf bases, causing them to blacken, wilt and fall over. 

 The fallen leaves turn brown. The fungus works down into the crown 

 and root proper, producing a browning of these parts. Later cracks 

 appear. The brown mycelial threads can easily be seen in the af- 

 fected parts. No real spores have been found. It is from this fact that 

 the fungus derives its name. All decaying vegetable matter should be 

 destroyed. Liming the soil is a help, but not an absolute preventative. 



LEAF BLIGHT OF CELERY. 



Cercospora apii Fr. 



This leaf blight is closely related to that of the beet. It produces 

 brownish irregular spots upon the leaves. As these increase in number, 

 they cause the leaf to take on a yellowish, sickly appearance. Within 

 these spots the spores are cut off from the ends of erect filaments. 



