TREE I. 
TREE II. 
W or maid. — ‘ Brown Rot ’ Diseases of Fruit Trees. 385 
Strains used ^ 
in the inocula- § ^ 
tions ^ 
{Aug. 1). 
M. cinerea 1 
f. pruni. 
Strain from 
a mummied 
plum. 
Aug. 6. 
Aug. 13. 
Nearly half 
the surface 
affected ; pus- 
tules none. 
Whole surface affected ; 
pustules numerous ; in con- 
tact with it were one wholly 
discoloured with two almost 
continuous zones of con- 
fluent pustules, and another 
with half the surface af- 
fected and bearing few 
pustules. 
2 Ditto Whole surface affected ; 
plum shrunken and 
wrinkled ; pustules nu- 
merous. 
Aug. 28. 
One other had 
also become in- 
fected from con- 
tagion ; all four 
were shrunken 
and bore nu- 
merous very 
pulverulent pus- 
tules becoming 
confluent and 
forming patches 
to 5 mm. diam. 
Pustules more 
numerous; plum 
still more 
shrunken and 
wrinkled. 
One-third of Ditto 
the surface 
affected ; pus- 
tules none. 
Pustules more 
numerous. 
4 
Ditto 
Nearly half 
the surface 
affected ; pus- 
tules none. 
Ditto 
As above, but with another 
plum in contact with it also 
discoloured over the whole 
surface and bearing many 
pustules. 
Pustules more 
numerous;along 
one side was a 
long continuous 
band (3x1 cm.) 
of confluent 
pustules. 
Both plums 
much shrunken 
and bearing 
numerous pus- 
tules. 
M. cinerea 
f. mali. 
Strain from a 
flowering spur 
of an apple 
tree. 
1 
2 
3 
4 
5 
The rot ex- 
tended 0-5- 
i*5 cm. from 
point of inocu- 
lation ; no pus- 
tules. 
Slight dis- 
coloration 
only, imme- 
diately round 
the wound. 
Extension of 
rot i*o-i. 8 
cm. ; no pus- 
tules. 
Whole surface discoloured 
and wrinkled, plum 
shrunken ; pustules many. 
Another plum in contact 
with it was discoloured 
over half its surface and 
bore a few pustules. 
Whole surface discoloured 
but not wrinkled and plum 
not shrunken ; pustules 
none. 
Whole surface discoloured, 
plum a little shrunken ; 
pustules many. 
Extension of As in No. 3, but pustules 
rot 1 *0-1*5 few. 
cm. ; no pus- 
tules. 
Extension of p . s in No. 3 ; pustules 
rot i* 3-1 *5 many, 
cm. ; no pus- 
tules. 
Both plums 
shrunken and 
bearing many 
pustules. 
Wrinkled and 
shrunken ; pus- 
tules few. 
Wrinkled and 
shrunken ; pus- 
tules many. 
Wrinkled and 
shrunken ; pus- 
tules few. 
Wrinkled and 
shrunken ; pus- 
tules many. 
