1898 | 
GERMINATION OF FUNGUS SPORES 
397 
Single spores might easily have been protected from the action 
of the fungicide by the nutrient medium. This idea is further 
supported by the fact, frequently noted in drop cultures of Uro- 
myces, that often a spore in the midst of a close bunch would 
grow when others near it and unprotected would fail. 
This 
was of such frequent occurrence as practically to prove that 
TABLE XIX. 
SHOWING LIMIT PREVENTING SPORADIC GERMINATION. 
Substance Botrytis Gloeosporium | Macrosporium| Penicillium Uromyces 
SS eee a neta pad cd 
| 25600 51200 Faced 6400 
: Nese as os ve i c pinto 
( a 400 > 50 100 4 100 
HCl 4 n n a 
ee ng Seite as = : 
100 > 50 = 50 ” 50 
ga easel Se ws us ad 
100 ee 50 2 5° > 100 
er Sn = 
Shy ee . Se 3 
es, i Ss . sd - Ss 
3200 3200 200 Ico 
ey mn 4 = 
3200 200 3200 
Cu(C,H,0,), . n n - = 
3200 1600 800 
Rie bhi aces ss: a s i 
6400 6400 — 1600 
K,Mn,0, Oe Ae MO ie - sd 
: 800 400 > 100 
K,CrO, pies woo < ie 5 < is we 
640 40 640 10 
K,Cr,0, cn iar rors = ~ aut a = sree 
1280 1280 1600 oped 
a: 0 Sa = cis 
ee > . > ge + : n 
KOH x 
Pee ee Oe Wee Swe & usd 
o non Fa on eae 
NaOH bee ee n bid a us 
es >. oe pea 100 
MeO i; ~ 
: oot mn 28 
ag OE ee be 
