Nov. 1, 1924 
Alternaria Leafspot of Cauliflower 
431 
theless, this fungus grows very slowly 
at high temperatures and no doubt had 
made some growth several hours be¬ 
fore a measurable disk was formed. 
This was also true as the minimum 
temperature was approached. No 
that the fungus can make considerable 
growth at the temperature existing in 
a refrigerator car in the week or two 
necessary for the shipment of the cauli¬ 
flower from the Pacific coast to eastern 
markets. 
growth was evident at 2°, the lowest 
temperature tried, until after the 
eighth day. However, 5 and 13 mm. 
of growth were made at this tempera¬ 
ture in 10 and 15 days, respectively. 
The minimum for growth is somewhere 
below 2°. Here again it is quite evident 
The optimum temperature for fruit¬ 
ing as determined in these experiments 
was between 26° and 28°, whilb the 
maximum and minimum were practi¬ 
cally identical with these tempera¬ 
tures for growth. 
