1898 | THE DEVELOPMENT OF SOME ANTHRACNOSES gt 
suggests that the species be transferred to the genus Colletotri- 
chum or Vermicularia. 
Under the title “ Identity of anthracnose of the bean and 
watermelon,”? Dr. Halsted describes some interesting experi- 
ments in inoculation of anthracnoses. The anthracnose of the 
watermelon was easily transferred to the bean, and a third fruit, 
the citron, was made to receive the anthracnose of both bean 
and watermelon; and he therefore regards the anthracnose of 
bean and watermelon, as well as that of the cucumber and musk- 
melon, as identical. So different was the development of the 
watermelon anthracnose from that described by Professor Atkin- 
son” for the anthracnose of the bean ( Colletotrichum lindemuthi- 
anum), that the latter was compared in artificial cultures with 
G. lagenarium. 
Some rusted beans of the Wardwell kidney wax variety were 
obtained and placed in a moist chamber to germinate. After 
the first pair of leaves had appeared on the stems of some of the 
seedlings, the anthracnose was manifested in the characteristic 
depressed patches. The center of the spots was of a light brown 
color, bordered by a reddish-brown margin. Scattered over the 
depressed portions were the small leather-colored pustules. The 
appearance on the host marked a difference in the species, the 
watermelon showing a more indefinitely spreading discolored 
portion of the host which is not depressed. The character of 
the pustules in section would give less evidence as to their iden- 
tity; in fact, there is a similarity both in shape and position of 
the acervulus, as well as in the length of the basidia and char- 
acter of the conidia. 
Dilution cultures were made in acidified and unacidified agar. 
The former medium was unfavorable to growth, as none of the 
conidia germinated. Those in the neutral medium two pays 
later showed signs of germination, while four days after sowing 
Several were found in different stages of germination. The first 
evidence of activity was seen in the swollen condition of the 
°N. J. Agr. Exp. Sta. Rep., pp. 347, 352. 1893- 
* Bor. Gaz, 20: 305-311. 18095. 
