June, 1955 Curt: Oak Witt INocuLA 295 
table 7. Spores in the dry atmosphere at all temperatures, figs. 10 and 11. 
were still viable after 250 days at 0, 12, When the longevity and germinability of 
and 16 degrees, table 8. The germinabil- spores stored in a dry atmosphere were 
ity of conidia from both the humid and plotted (number of days on a logarithmic 
the dry atmospheres decreased with time scale), the decrease in germinability of 
90 
PER CENT GERMINATION 
5 10 15 30. 4555 70 102 162 
TIME (DAYS) 
Fig. 10.—Germination of conidia of Endoconidiophora fagacearum stored at six tempera- 
tures in a water-saturated atmosphere. The curves illustrate the effect of temperature and 
humidity on longevity of the conidia. 
90 
b 
° 
PER CENT GERMINATION 
w 
12) 
TIME (DAYS) 
Fig. 11—Germination of conidia of Endoconidiophora fagacearum stored at six tempera- 
tures in a dry atmosphere. The curves illustrate the effect of temperature and lack of humidity 
on longevity of the conidia. 
