2IO 



Bulletin 132. 



as that seen in the garden in severe cases. The outer green leaves 

 are the first to wilt, and on these the black dots, representing 

 the fruiting bodies of the fungus, are scattered indiscriminately. 



Soon the fungus spreads to the 

 younger and blanching central 

 leaves, wilting and discoloring 

 these wherever a foothold is 

 secured. Fig. 53 is a photograph 

 of a diseased plant from this cel- 

 lar, showing the wilted and black- 

 ened appearance of the leaves. 

 The plant was so much wilted 

 that the photograph was neces- 

 sarily taken by suspending the 

 plant top downward. In the root 

 house the temperature was evi- 

 dently much lower than in the 

 cellar, but even in the former the 

 disease was destructive . As far as 

 marketable plants were con- 

 cerned, the whole stored product 

 was greatly reduced, and I could 

 see no hope of profit on the neces- 

 sary outlay. 



As the late blight was proving 

 so destructive in Ithaca, where 

 celery is grown on a small scale 

 only, it was thought well to visit 

 some other truck regions of the 

 state where celery gardens are 

 more abundant. Accordingly, 

 early in January a visit was made 

 to South Lima and Irondequoit 

 with the hope of securing, even 

 at this late date, additional and valuable data relative to the 

 injuries from this disease in the storage cellar. 



On making a survey of the root houses at South Lima, I found 

 the amount of loss sustained from the late blight far greater than 



53. — Celery plant, from a cellar, 

 affected with late blight. 



