Bailey. — Puccinia malvacearum and the My coplasm Theory. 195 
Table III. 
Ref. No. 
Inoculations . 
First appearance of rust . 
Remarks . 
Date. 
Method. 
G.G. 1. 
26.10.14 
Infected leaves 
shaken over 
open neck of 
globe. 
8.12.14. Four middle-aged 
leaves show few pustules 
(average, 9 per leaf). 
Rust increased rapidly, 
and by 1 2.1. 15 all 
leaves, except the very 
smallest, were heavily 
rusted. 
G.G. 2. 
G.G. 3. 
1 - 
nil 
Details given above in Table II. 
G.G. 4. 
19. 10.14 
Sprayed with 
suspension of 
teleutospores 
which had ger- 
minated to pro- 
duce both spori- 
dia and oidia. 
8.12.14. Eleven leaves show 
pustules, only the unexpanded 
leaves being free. Maximum 
number of pustules on one 
leaf, 64. Average number 1 0 
per infected leaf. 
Rust increased rapidly, 
and by 12.1.15 the 
plant was mostly dead. 
G.G. 5. ) 
G.G. 6. 
G.G. 7. J 
nil. 
nil. 
Last examined 13.5. 15, 
when they were still 
free from disease. 
G.G. 8. 
29.9.14 
Sprayed with 
suspension of 
teleutospores 
which had ger- 
minated to form 
oidia. 
20.11.14. Five youngish leaves 
affected. Maximum number 
of pustules on one leaf, 70. 
Average number, 30 per in- 
fected leaf. 
Rust increased rapidly 
till by 12. 1. 15 all 
leaves were killed with 
the exception of those 
still unexpanded. 
6.10.14 
Ditto. 
G.G. 9. 
— 
nil. 
nil. 
G.G. 10 
nil. 
24.12.14. Three leaves (one 
fairly old and the other two 
middle-aged) show one or 
two incipient pustules. 
Progress of disease 
rapid. By 1 2.1. 15 
most of the leaves bore 
numerous pustules, and 
by 5-3.15 the plant 
was dead. 
It will be noticed that in none of these cases is the initial severity of 
the outbreak sufficient to place the plants in Eriksson's category of 4 primary 
infection \ They appear, rather, to be the result of separate infections in 
each case, and in the case of plants which had been artificially inoculated 
may have arisen from teleutospores that had germinated some days after 
their introduction into the globes. 
A final word is necessary as to the behaviour of the controls during the 
last stages of the experiment. 
The fate of those which were planted out in April 1914 has already 
been described. 
’ Those of the three kinds (Sicilian, Chater’s, and Double German) which 
had been grown in pots under a north wall in the open first showed a few 
pustules on September 22. In this case also the disease continued to 
increase, but more slowly, until the plants died down for the winter. 
