Notes and Brief Articles 



99 



A twig and leaf disease of Kerria japonica, due to Cocomyces 

 Kerriae sp. nov., is described at some length by V. B. Stewart in 

 the December number of Phytopathology. The disease not only 

 causes a premature fall of the leaves but also affects the shoots, 

 often injuring the bushes to such an extent that they die during 

 the winter. A sulphur fungicide is recommended for checking the 

 disease. 



The occurrence of walnut blight in the eastern United States 

 is discussed by S. M. McMurran in Bulletin 611 of the U. S. 

 Department of Agriculture. This disease, caused by Bacterium 

 Juglandis, has been established on the Pacific coast for some 

 time, where it attacks the Persian walnut. The development of 

 immune or highly resistant varieties is being attempted. 



An article on the crown canker disease of roses, with several 

 illustrations, by L. M. Massey, appears in the December number 

 of Phytopathology. This disease is caused by Cylindrocladium 

 scoparium, which has hitherto been considered a saprophyte and 

 not supposed to occur on roses. No method of control has been 

 discovered, hut rose-growers are cautioned to sterilize their soil 

 and use only healthy stock. 



John A. Stevenson reports in the December number of Phyto- 

 pathology that a new and alarming cane disease appeared in the 

 western end of Porto Rico two years ago and is still spreading at 

 a rapid rate, with a loss of from ten to fifty per cent, in the crop 

 in two years and a total loss the third year after infection. Con- 

 tinued efforts have been made to ascertain the cause of this 

 mottling disease but without result. All control measures that 

 have been tried have also failed. 



Continuing his list of wood-destroying fungi which grow both 

 on coniferous and deciduous trees, James R. Weir lists in the 

 October number of Phytopathology, Daedalea confragosa on 

 Abies grandis, Daedalea unicolor on Abies lasiocarpa, Polyporus 



