New York AGRICULTURAL EXPERIMENT STATION. 319 
This Macrophoma resembles Spheropsis malorum Pk., closely 
in all respects except that the spores are hyaline, the spores of 
Spheropsis being dark. Saccardo even suggests that it may be 
an immature stage of that fungus. But since the spores are 
still hyaline when germination takes place and, after sufficient 
growth, they in turn produce hyaline spores, there is no doubt 
as to the distinction between the two species. 
Numerous inoculations were made in both apple and pear 
trees with cultures of the Macrophoma from both of these hosts, 
but in no instance were positive results secured. These experi- 
ments should be repeated, however, before deciding that the 
fungus is not parasitic. 
THE EUROPEAN CANKER. 
Mention is made in Bulletin 163 of the canker fungus, Nectria 
ditissima, which is a common and serious orchard disease in 
many parts of Europe. WN. cinnabarina is also mentioned as hav- 
ing been found on quince trees in an orchard near Geneva and 
an illustration is given of the injury that is produced. This 
species is quite common in America, but is not regarded as being 
particularly injurious. Up to this time the former species had 
not been recorded as occurring on apple trees in America, but 
during the past season specimens of apple limbs were received 
at the Experiment Station which proved to be infected with 
this fungus. 2.2 «aah ge EE LS ph tout bel ee 
The following account of this disease is quoted from Science? 
~ 
“Shortly after Bulletin No. 163 of this Station, entitled ‘A New York 
Apple Tree Canker,’ was distributed, the writer received specimens of dis- 
eased apple limbs from various parts of the United States and Canada. 
Among the rest was a specimen from Nova Scotia which was noticeably 
different from any that I had yet seen. The injury was about six inches 
long on a limb two inches in diameter. Within the diseased area was 
*Paddock, W. European Apple Tree Canker in America. Science, 12: 
297-299, 
