316 Intinoris NaTurAL History SurRvVEY BULLETIN Vol. 26, Art. 3 
The average number of perithecia on a presented by months and by mat classes 
6 mm. square area of mat surface and the in table 20. Some mature mats had many 
average germinability of ascospores are young perithecia not exuding ascopores, 
Table 20.—Average numbers of perithecia on 6-mm. square areas of surface on perithe- 
cium-bearing mats of Endoconidiophora fagacearum in four condition classes* and per cent ger- 
Crass II Crass III Crass IV Crass V 
| 
—_— ' _— X we Go 
MonrtTH Ss = o os : o Os : o S.s = Fs 
oo Eo ee Ms elas ee Eo oD £9 
2 3 ow 2.2 Soo! 26 Se] 26 voy 
ex | YS es | 6s) 4 |S 6a ee yee 
35 He Bo Poa | s5 Sac | So oa. 
Za tS Z, Bx oO of ZA, | Ace A Oy ao 
October... 32 27 ee a 0 a 0 ee 
NOP OTIAIES S's), 5 615 See ad Boa t 0 — 50 9 0 —- 
Decembete. 6. a. R230 0 28 0 0 _ 0 — 
TanGary cs cue kes 0 — 86 0 16 0 0 — 
February. . Meet Dahl re 5 t 42 0 7 t 
March.... ees ee 0 — 5 i} 4 t 
PBEM et ine coven Bei T 35 49 3 T0 0 _ 
Eee ee Rae Be a ae 34 42 27 |e — 
Ta aR RE ers By 5 T Solo oe 38 16 16°34) e 11 
*Condition class II, mature; III, aging; IV, declining; V, deteriorating. 
+Because the surface was infested with nematodes, bacteria, and Graphium sp., it could not be told with certainty 
whether the ascospores had germinated. 
OCTOBER 
NOVEMBER 
DECEMBER 
JANUARY 
FEBRUARY 
MARCH 
APRIL 
0 10 20 30 40 50 0 10 20 30 40 50 
NUMBER OF PERITHECIA GERMINATION OF ASCOSPORES 
(PER CENT) 
Fig. 22.— Average number of perithecia on a 6-mm. square area of mat surface and average 
per cent germination of ascospores taken from mycelial mats of Endoconidiophora fagacearum, 
October, 1952, through June, 1953. 
