141 
earded as culls because of deep cracks and because of a rot resulting from 
scab-like lesions on the side of the melon that was in contact with the 
soil in the field. 
CARROT. 
Leaf-spot caused by Cercospora apii var. carotae was found in the Indi- 
anapolis market gardens. 
CATALPA. 
Leaf-spot due to Macrosporium catalpae was widespread. 
CELERY. 
The most serious disease of celery as observed near Lafayette and Indi- 
anapolis was the root trouble known as the “stunting disease’?*, “erown 
rot,” or “yellows”. This is caused by a soil fungus, Fusarium, and is essen- 
tially similar in its effects to the cabbage yellows disease. Affected plants 
show a yellow color or premature bleaching of the older leaves usually on 
one side, exhibit all degrees of stunting, and may die early in the season or 
continue a sickly existence. The fungus persists in the soil and the dis- 
eased areas enlarge year by yvear. The disease is confined chiefly to the 
highly desirable Golden Self-blanching variety and green or late yarieties 
are practically immune. In 1914 this disease was so prevalent in the celery 
marshes at Kalamazoo, Michigan, and Goshen, Indiana, that the industry 
was threatened with failure. Steam soil sterilization was found to be effect- 
ive but rather impracticable, and the situation was relieved by the dis- 
covery that the Easy Bleaching variety, though slightly less desirable com- 
mercially, was highly resistant to the disease. This variety has now com- 
pletely supplanted the Golden Self-bleaching variety at Kalamazoo and 
Goshen. At present the disease is just gaining a foothold in the Indianapolis 
market gardens. This season it caused one grower to plow under his celery, 
and caused a practical failure for another. A small area was found in a 
third field, and in another case two diseased plants were found in the cold 
frames early in the season and a few scattered plants in the field later. In 
this disease, as in cabbage yellows, dissemination is largely by means of 
diseased transplants. 
In the Goshen crop, early blight caused by Cercospora apii was very de- 
structive as observed in early September. Late blight due to NSeptoria 
petroselint occurred in a garden in Rush County in September. The bac- 
terial leaf-spot was found near Lafayette, August 11th., and in some of 
the Indianapolis market gardens, August 22nd. Some nematode injury 
was found at Goshen where there is a large area of muck soil so badly in- 
Coons, G. H. ‘ The Michigan plant disease survey for 1914. Mich. Acad. Sci. 
17th. Ann. Rpt. :126-127. 1915. 
“Coons, G. H. Michigan plant disease survey for 1917. Mich, Acad, Sci, 20th. 
Ann, Rpt. :444, 1918, : 
