56 



PROTECTION OF PLANTS — 1924-2 



sterile loop. In cases where spores were not Ijeing produced in the four cultures 

 that would not sporulate, a small portion of mycelium was transferred. The 

 cultures were allowed to grow for forty days in a temperature held between 

 22" and 24" C. The weights of dried mycelium are given in Table V. 



When the cultures were split up according to Leach's differential hosts, it 

 was seen that the cultures that came under : — 



Form I gave an average weight of .0157 gm. 



Form II " " " " " .0088 ' 



Form VIII " " " " " .0096 " 



While Leach's Form I gave an average for two flasks of . 0625 

 Form II " " " " " " .112 



Form VIII " ' " " " " .0125 



There does not seem to be any possible correlation between them, but when 

 the weights are taken of the groupings that apeared as a result of the infections 

 that are shown in Table II, it is possible to see a certain amount of uniformity. 

 Cultures 2, 4, 5, 26 and 31 that are identical in Table II give an average weight 



TABLE V 



Growth weights on modified Czapeck's Solution with Mannitol as the Carbon 



Source. 



of .0083 of a gram, F .0023, cultures 1, 30, and 32 have an average weight of 

 .01, F .0035, and cultures 6,25, and 29 are .021, F .0005 in average weight. Cul- 

 ture 33 which is .0255 is similar in weight to these 'ast but differs somewhat in 



