224 



DISEASES OF ECONOMIC PLANTS 



ease appears and often enough 

 thereafter to cover growing 

 parts, is recommended.' 



Phyllostictose (Phyllostida 

 cucurbitacearum Sacc . ) • — Th is 

 leaf spot has been destructive 

 in several states, notably so in 

 New Jersey and Ohio. The 

 spots are light colored and the 

 fungus appears as a pycnidium 

 in their centers. 



Cladosporiose. See cucumber. 



CARROT 



Soft rot, bacillose (Bacillus 

 carotovorus Jones ^). — In Ver- 

 mont serious loss from rotting 

 of carrots was reported to the 

 Experiment Station in 1898. 

 Investigation by Jones* showed 

 it to be due to bacteria and that 

 numerous other crops, namely, 

 turnip, rutabaga, radish, salsify, 

 parsnip, onion, celery, hyacinth 

 leaves, and the fruit of tomato, 



eggplant, and pepper were susceptible to the same disease. 



Cauliflower, Irish potato, sweet potato, beet, and asparagus 



were not susceptible. 



' Grossenbaeher, J. G., N.Y. (Geneva) Agr. Exp. Sta. Tech. Bui. 9, 

 Febraary, 1909. 



; 2 Jone3, L. R., Vt. Agr. Exp. St.i. Rpt. IS, 299, 1901 ; also N.Y. (Geneva) 

 Agr. Exp. Sta. Tech. Bui. 11, 1910. 



FlQ. 105. — Carrot showing soft 

 rot ; shaded portions represent 

 the rotted part of the root. Re- 

 drawn after Jones. 



