286 
100 
90 
80 
70 
60 
50 
40 
PER CENT GERMINATION 
30 
20 
10) 12 
24 
Ittinors NATURAL History SuRvVEY BULLETIN 
Vol. 26, Art. 3 
36 48 60 
TIME (HOURS) 
Fig. 4-—Germination of conidia of Endoconidiophora fagacearum on 2 per cent water agar 
at five temperatures. 
the surfaces of the media as described for 
the 7-day-old culture above. 
Germination of naturally occurring co- 
nidia was slightly higher on the dextrose 
agar at 28 degrees than on water agar at 
the same temperature. However, on dex- 
trose agar, the count was confused by the 
production of secondary conidia after 30 
hours, and the contaminants made very 
rapid growth, further confusing the 
counting of germinated conidia. 
Ascospores from laboratory cultures 
