Notes upon Celery. 



209 



The disease is active in the field until the last plants are lifted ; 

 and, as mentioned before, I have found it following the early blight 

 during the cooler weather. However, as will be seen later, the 

 late blight does not confine its ravages to the field, but extends 

 its destructive action to the storage coop, or cellar, and as the 

 disease has already been termed a blight, it seems well to speak 

 of it as the "late Might." There is already another fungus 

 called the " leaf-spot of celery." 



From later observations it 

 seems that the late blight was 

 the most injurious celery fun- 

 gus during the past season, but 

 it was not so destructive at 

 Ithaca. Few experiments have 

 as yet been made with the use 

 of fungicides upon it, but it 

 has been recommended by the 

 New York (State) Station at 

 Geneva to spray young plants 

 with Bordeaux mixture. With 

 older plants it would be better to use the ammoniacal copper 

 carbonate, or it may prove as well to use the latter throughout. 

 The same caution relative to the use of healthy seedlings will 

 apply as for the early blight, and in this case it is especially 

 necessar)^ to begin early. Further remedial suggestions will be 

 made later. 



52. — Section of a pycnidium, or fruit- 

 body, of the late blight. 



Late Blight in the Storage House. 



It is to be remembered that the late blight may yet be active 

 when the la^*- lot- of celery is transferred to the coop, or root house, 

 as these storage cellars are variously termed. This brings us to 

 an important feature of the celery disease question, and one which, 

 apparently, has hitherto received no attention. Again my atten- 

 tion was first called to this matter on the premises of R. W. Parr, 

 Ithaca, by an examination made late in December of celer)^ stored 

 both in a cellar and in a root house. In the cellar where the 

 trouble was greatest, the temperature was manifestly higher than 

 might be desired. The first efiect of the disease is quite the same 



