The spread of Wart disease (Black scab) of Potatoes. 



The Gardener's Chronicle, no 3600, p. 137, London, Feb. 26, 1910. 



Inspectors of the Board of Agriculture report that in 1909 Wart 

 disease, Oedomyces leproides occurred in, and was almost confined to, 

 an area including Lancashire (south of the Ribble) Cheshire, Shrop- 

 shire (North of Shrewsbury) Staffordshire and certain parishes in 

 Warwickshire and Worcesteshire, adjoining Birmingham. From this 

 centre the disease was traced, spreading somewhat irregularly in sou- 

 therly and westerly directions. So far, few field crops have been 

 affected even within the central area of infection. There, and 

 also in the outlying districts, the disease is confined mainly to al- 

 lotments and gardens. 



E. RIEHM. The Wart disease of the Potato in England. 



(Contbl. Bact, etc.; 24, 1909, 8-12, 208-213); abs. Exper. Stat. 

 Rec., Vol. XXII, June 1910. 



Referring to the potato wart disease, the author discusses the 

 identity of Chrysophlyctis endobiotica with (Edomyces leproides, and con- 

 cludes that the two are not identical. The entrance of the zoo- 

 spores into the host plant has not been observed, but plasmodia 

 were found in the diseased tissues. The fungus belongs to the 

 Olpidiaceae group. It is claimed that the resting sporangia can 

 live for at least 6 years in the soil. The disease is spread by 

 means of the soil and seed potatoes. The remedies are gas lime, 

 quicklime and sulphur applied to the soil. The article closes with 

 a bibliography of the disease. 



EDWIN F. SMITH. Tomato and Potato Bacteriosis. The 



Journ. of the Board of Agriculture, July 1910, vol. XVII, no 4, 

 p. 297, London. 



This disease has been known for some time in the United 

 States, where it has been carefully studied by Dr. Erwin F. Smith. 

 The organism concerned is called Bacillus solanacearum, E. F. 

 Smith. Potatoes, tomatoes, and egg-plants are attacked, some- 

 times on a large scale, in America. In this country it was first 

 observed in 1902. (Jour. Bd. Agric., IX, p. 308) in small quantity 

 of potatoes grown in the North of England and in Scotland. 



During the present season the same disease has attacked toma- 





