288 PLANT DISEASES 



black spots are noticed, to prevent the spread of the 



fungus. 



Stoneman, Bot. Gaz., vol. xxvi. p. 69, fig. 



Gloeosporiiim rhododendri, Briosi and Cavara. — This 

 fungus forms large yellowish blotches on the leaves. The 

 minute black pustules containing the spores are arranged 

 in irregular concentric circles on the bleached spots. 



Briosi e Cavara, Fung. Parassiti delle Piante Coltiv. od 

 Utili, No. 198, fig. 



Gloeosporium bicolor, M'Alp. — Forming wax-yellow, 

 then brown pustules on ripe grapes in Australia. Difiiers 

 from allies in the conidia being colourless, even in the 

 mass. No bitter taste is imparted to the fruit attacked. 



M'Alpine, Add. to Fungi on the Vine in Australia, p. 38. 



ANTHRACNOSE OF SCAELET RUNNER 



(Colleiotrichum lindemuthianum, Briosi and Cavara.) 



A disease commonly attacking the pods of scarlet 

 runners, less frequently those of French beans, sometimes 

 also present on the stem and leaves. 



On the pods the disease appears first as small dark 

 spots, bounded by a reddish line. These spots continue to 

 increase in size and often run into each other, forming 

 irregular blotches, which become sunk below the general 

 level of the surface. On the stem the patches corrode the 

 tissues and kill the part above the wound. 



