
New Yorx Agricurrurat Exrrrment Sration. 573 
_ disease than the green varieties.“ The White Plume has been 
mentioned in particular as subject to this disease. 
Weather conditions certainly have much to do with the activity 
of the disease. When the atmosphere is hot and moist the center 
blight makes most rapid progress and the injury is correspond- 
ingly great. ‘These conditions are frequently found during July 
and August when the celery is banked up for blanching and the 
warm moist atmosphere surrounding the plants favors not only 
the production of tender succulent whitened centers but also 
favors the development of center blight. 
Plants that are not too severely attacked may, under favorable 
conditions, form new centers and especially is this true of young — 
and vigorous plants. Even those which are very badly attacked 
may recover as was shown by selecting a few such plants, strip- 
ping off the outer foliage and setting them in pots in the green- 
house late in the fall. With but one exception the plants formed 
new healthy centers, though the outer foliage still showed a little 
blight. The fact that celery can to such an extent withstand the 
inroads of the germs of center blight even after the disease has 
destroyed some portion of the plant, shows the importance of so 
treating the plants and the soil as to secure as healthy and vig- 
orous a growth as possible. 
TREATMENT SUGGESTED. 
The experiments conducted in 1892 under the direction of this 
Station by Mr. DeWitt C. Curtis, of Horseheads, N. Y., in spray- 
ing for prevention of center blight, gave only negative results. 
The fact that beneficial results can be obtained from the use of 
fungicides for this disease has not yet been established. For the 
present, therefore, it is best to oppose the disease by sanitary 
measnres, that is to say, by adopting those methods of growing 
and handling the celery crop which seem to be most favorable for 
the development of vigor and vitality in the plants and by avoid- 
ing so far as possible those conditions which are most favorable to- 
the development of the disease. It is suggested that the follow- 
ing methods be given a trial. 
WI 
Zz 
i 
f 
Ne 
ta re 
ete 
1. When celery is to be grown on the same ground year after 
year do not allow the refuse to rot on the ground. It is filled 
with diseased germs, and it would be better to take the celery, 
 * See “Fungi as Related to Variegated Plants,’ by B. D. Halsted in Bull. Torrey Botanical 
club, vol, xix, ‘PP. 84-88. 
