INOCULATION EXPEKIMENTS. 87 



LEMON TO TEA. 



On December 17 leaves of a living plant were inoculated by punc- 

 ture with conidia from a lemon leaf. No signs of infection were found 

 at the end of a month. 



LOQUAT TO BEAN. 



On June 4 six young pods from a greenhouse plant were inoculated 

 by immersion in sterile water containing conidia. No signs of infec- 

 tion ever followed. 



MANDARIN TO BEAN. 



On June 4 six young pods from a greenhouse plant were inoculated 

 by immersing beans in sterile water containing conidia. No signs of 

 infection ever appeared. 



MANDARIN TO COTTON. 



On April 1 flowers of a greenhouse plant were inoculated by apply- 

 ing conidia to the stigmas. No signs of infection followed, but the 

 young bolls soon dropped off. They were placed in a moist chamber, 

 but no Gloeosporium developed. 



MARANTA TO COTTON. 



Stigmas of three Bowers of a greenhouse plant were inoculated in the 

 same manner as above. No signs of infection followed, but the young 

 bolls dropped off. They were placed in a moist chamber, but no 

 Gloeosporium developed. 



ORANGE TO BEAN. 



On June 5 six young pods on a greenhouse plant were inoculated by 

 immersion in sterile water with conidia. No signs of infection ever 

 appeared. 



ORANGE TO COTTON. 



On April 1 three flowers were inoculated by applying conidia to the 

 stigmas. No indications of infection appeared, but the young bolls 

 soon dropped. These bolls were kept in a moist chamber, but no 

 Gloeosporium developed. 



On June 24 five young bolls were inoculated by puncture with 

 conidia from this host. Two developed slight decay and when 

 removed to a moist chamber acervuli developed. Six others inocu- 

 lated in the same way a little later showed scarcely any signs of decay 

 about the point of inoculation but developed acervuli when removed 

 to a moist chamber. 



252 



