268 PLANT DISEASES 



VINE LEAF RUST 



(Urcdo vitis, Thumen. 

 = Uredo vialae, Lagerh.) 



This fungus forms small, yellowish, powdery pustules 

 on cultivated vine leaves, and has been recorded from 

 the United States and some of the West Indian Islands. 



PREVENTIVE MEANS. The parasite has hitherto occurred 

 in small quantity, and little or no injury done. Spraying 

 with a fungicide would probably check its spread, if inclined 

 to be troublesome. 



Lagerheim, Compt. Rend., 1890, p. 728. 

 Massee, Greviltea, vol. xxi. p. 119 (1893), 



CANNA DISEASE 



(Uredo cannae, Winter.) 



A destructive pest to cultivated cannas in the West 

 Indies and other parts of the New World, but has not yet 

 been recorded as doing damage in Europe. 



The fungus forms numerous small, orange-coloured 

 spots on the leaves, which become discoloured and die 

 in consequence. The summer spores enable the disease 

 to spread rapidly when once present. Destroying dis- 

 eased leaves is to be recommended, also spraying with 

 a fungicide. 



SPHAEROPSIDIACEAE 



AUSTRALIAN 'SHOT-HOLE FUNGUS ' 



(Phyllosticta prunicola, Sacc.) 



This fungus attacks living leaves of apple, pear, plum, 

 cherry, apricot, etc. Small brownish spots first appear on 



