ROSE RUST 261 



bonate of copper solution checks the aecidium and uredo 



stages. 





/r 1; 



;.>v-V .;:/" .v-' .?/ 



Fig. 67. Phragmidium subcorticatum, i, rose branch 

 and leaves infected with aecidium stage of disease; 2, leaf 

 with clusters of teleutospores ; 3, teleutospores, x 300 ; 

 4, uredospores, x 300. 



The fungus also grows oh wild roses, and these may 

 become a source of infection unless precautions are taken. 



PINE CLUSTER-CUPS 



(Coleosporium senecionis. Fries. 



= Peridermium pini, VVallr.) 



One of the heteroecious parasites, the uredo and teleuto- 

 spore stages forming orange patches on the under surface 



