




_ New York AgricutturaL Expuriment Station. 541, 
formerly known as Glwosporium Lindemuthianum, Sacc. and 
‘Magn. It is found on various varieties both of bush and pole 
beans of the species Plascolus vulgaris, ., and is not confined to 
wax and butter beans. In an article on Glwosporium Linde- 
muthianum published in the Department of Agriculture Report, 
1887, page 361, it is stated that “It is the pods and the beans 
they contain that are chiefly affected, the other parts of the plant 
being rarely if ever attacked. Frank attempted to infect the 
leaves and stems but with no result. He also tried to infect 
different plants but failed.” During the past season we have fre- 
quently found the fungus fruiting on stems-and leaves and have 
- seen plants killed by the disease not only before they had pro- 
duced any pods but even before they had blossomed. Early in 
the season there have been found rows of beans with every plant 
infested with anthracnose. In 1891 Dr. Halsted* showed that 
the disease may be carried over winter in infected seed and that 
the disease frequently appears on the stems and cotyledons of 
_ plants growing from such seed. He also succeeded in infecting 
_ the leaves and in transferring the disease to healthy bean plants, 
The results he obtained have found abundant confirmation in the 
work at this Station during the past season. 
Microscopic «HARACTERS. — The microscopic characters of this 
fungus may be briefly given as follows: 
The mycelium is septate, branched and of variable diameter. 
It may be hyaline or nearly so, ,but just beneath the 
epidermis it forms a dense, dark-colored stroma, which precedes 
the production of spores. From this stroma arise the dense 
clusters of basidia that at first lift the unbroken epidermis and | 
form dark dots or pimples (acervuli) visible to the naked eye, on 
the diseased surface. On the extremities of the basidia_ spores 
are produced, and finally pale pinkish colored masses of them 
about the size of pin points burst the epidermis as shown on the 
diseased spots of the pods in Fig. 2. Sometimes neither the 
blackened color of the stroma nor the pink tint of the spore masses. 
is noticeable, but such exceptions are infrequent. Grown on 
4 _ sterilized potato plugs in test tube cultures the spore masses were 


* Annual Report N, J. Exper. Station, 1891, page 284, 
