380 
Journal of Agricultural Research 
Vol. V, No. 9 
Table IV .—Texture of flesh and skin, ripening date , and relative resistance of varieties of 
plums to Sclerotinia cinerea 
Variety. 
A X W 2.... 
A X W ii ... 
A X W 12 ... 
AX W15... 
AX W 17..., 
A X W 18 ... 
B X W 1. 
B X W2. 
B X W4. 
B X W 5 . 
B X W 6_ 
B X W 9 .... 
B X W 12 ... 
B X W15 ... 
B X W 16.... 
B X W 21 ... 
*S. D. No. 1.. 
*S. D. No. 2. . 
*S. D. No. 3. . 
Burbank. 
Wolf. 
*Ocheeda. 
*Harrison. 
*Surprise. 
*Hammer. 
*Newman. 
*Mani toba 
No. 1. 
*Amer i c a n a 
seedling 
No. 1. 
^Americana 
se edling 
No. 2. 
Etopa. 
Opata. 
Okiya. 
Wakapa. 
Compass. 
Sana cherry... 
*Reagan. 
Date of 
ripening. 
Aug. 25 
Aug. 19 
Sept. 2 
Aug. 18 
Sept. 2 
Aug. 31 
Aug. 31 
Sept. 2 
Sept. 2 
Aug. 22 
Aug. 31 
Aug. 18 
Sept. 2 
Aug. 27 
Aug. 19 
Aug. 15 
Aug. 15 
Aug. 15 
Aug. 17 
Sept. 1 
Aug. 17 
Aug. 18 
Aug. 18 
Aug. 15 
Aug. 10 
Sept. 
Texture of flesh. 
Medium firm, tender... 
Firm, medium tender.. 
Firm, tender. 
Tender. 
Medium firm, tender... 
Soft, tender. 
— .do. 
.do. 
Medium firm, tender... 
Firm, tender. 
.do. 
.do... 
Very firm, medium ten¬ 
der. 
Soft, tender. 
Firm, tender. 
Soft, tender. 
Firm, tender. 
.do. 
Soft, tender. 
Medium firm, tender... 
Firm, tough 
Soft, tender, 
....do.. 
....do. 
_do.. 
_do. 
do. 
Very firm, medium ten¬ 
der. 
Texture of 
skin. 
Medium 
Tough.. 
Tough.. 
Medium 
Tough.. 
Medium 
Tender. 
Medium 
,..do_ 
Tough.. 
. .do_ 
.. ^do. ... 
Medium 
. .do_ 
Tough.. 
Tender. 
Medium 
. .do- 
Tough.. 
Medium 
Tough.. 
. .do— 
Medium 
..do.... 
.. do_ 
Tender. 
Tough.. 
do. 
Tender.. 
Medium. 
Tender.. 
..do. 
. .do. 
. .do. 
Tough... 
Thickness 
of skin. 
Medium. . 
Thin. 
Medium.. 
..do... *.. 
Medium-f- 
Medium. . 
Thin. 
Medium. . 
Medium -j- 
Medium.. 
..do. 
..do. 
Thick.... 
. .do. 
. .do. 
Thin. 
Medium.. 
..do. 
..do. 
Thick.... 
Medium. . 
. .do. 
Thick.... 
Medium. . 
. .do. 
. .do. 
Thick. 
Thin 
. .do. 
. .do. 
. .do. 
. .do. 
. .do. 
. .do. 
Thick.... 
Relative 
suscepti¬ 
bility.® 
++ 
+++ 
++ 
+ 
++ 
+++ 
++ 
++ 
++ 
+ 
++ 
+ 
++ - 
++ 
++++ 
+ 
+ 
+++ 
++ 
++ 
H—(■ 
+++ 
+++ 
+++ 
++++ 
+ 
H—f-++ 
++++ 
+++ 
++++ 
++++ 
++++ 
++++ 
+ 
» + Indicates least relative susceptibility; ++++ indicates greatest relative susceptibility. 
The results show striking differences in resistance of the several 
varieties to infection. In the case of very susceptible varieties, as the 
Compass and sand cherry, it is always very easy to get a large number 
of infection spots. In the case of a very resistant variety, such as 
BXW15, it is often very hard to cause infection. In one trial, begun 
on July 8, 1913, in which green plums, about three-quarters grown, 
