i io PLANT DISEASES 



covered with greenish-brown velvety patches consisting 

 of Aliernaria^ Cladosporium, and Macrosporium spores ; 

 whether any of these are included in the life-cycle of the 

 Sphaerella is not yet known. Apparently the same disease 

 has been recorded by Dr. M'Weeney as attacking stored 

 mangel in Ireland. 



PREVENTIVE MEANS. As the disease appears somewhat 

 late in the season, it has been recommended to lift the 

 crop, if the disease appears, before the fungus passes from 

 the leaves to the root. All diseased leaves should be 

 collected and burned or buried, otherwise the ascigerous 

 condition develops on the dead parts, and a return of the 

 disease the following season would probably result. Great 

 care should be taken not to include diseased roots in 

 storing. 



Frank, Zeitschr. fur Zuckerrubenind., 1892, p. 904; and 

 Zeitschr.fiir Pflanzenkr., vol. iii. p. 90, figs. 



M'Weeney, Journ. Roy. Agric. Soc., ser. in. vol. vi. 

 Pt- 3- (1895) figs. 



Prillieux, Malad. des Plantes Agric., vol. ii. p. 263, figs. 

 (1897). 



CHERRY LEAF SCORCH 



(Gnomonia erythrostoma, Auersw.) 



A disease which every now and again proves destructive 

 to the cherry crop in various parts of Europe. The leaves 

 are attacked, soon presenting a scorched appearance, 

 withering, but hanging on the tree throughout the winter. 

 Long, slender, colourless, curved conidia are first pro- 



