Sept, is, 1923 
Corticium vagum on the Pea and Bean 
433 
was planted with seven peas and two cotton seeds and held as a control. 
The results as reported are graphically shown in figure 1 and in Table I. 
All control plants were reported to be free from lesions. 
28 
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1 1 __ 
543 
TOT/ 
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X 
X 
X 
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30 
P /2 /& /0 3/ 24- 27 
Z£& C3&V7VG&?£>£‘ 
EiO. 1.—Effect of soil temperature upon the severity erf injury to peas and cotton caused by Corticium vagum. 
Table I .—Effects of growing pea and cotton plants at various temperatures in soil inoc¬ 
ulated with Corticium vagum 
PEAS 
Temperature at 
depth of 1 inch. 
Plants 
gro nin 
uninocu¬ 
lated soil. 
Plants grown in inoculated soil. 
Total 
number. 
Number 
slightly 
injured. 
Number 
severely 
injured. 
Number 
cutoff. 
Number 
uninjured. 
Total 
intensity of 
injury.** 
3 
II 
2 
9 
2 
7 
13 
I 
12 
2 
6 
IO 
2 
2 
6 
6 
6 
II 
2 
4 
3 
2 
19 
6 
12 
2 
3 
3 
4 
17 
7 
II 
4 
1 
7 
11 
7 
II 
I 
1 
9 
3 
7 
13 
13 
°c. 
95 . 
12.2. 
i5-o. 
18.0. 
20.5. 
23-5 . 
26.0. 
28.0. 
COTTON 
Tf ft . , 
1 
21 
A o ,w . 
l8 O 
2 
21 
2 T t . 
2 
2 
2 
19 
18 
* A o . 
95 £ .... 
2 
3 
7 
7 
7 
^o* 5 * .. 
26.0 f . 
2 
4 
0 
i- 
2 
6 
s>$ . 
2 
2 
K 
2 
J 
a In estimating the extent of injury upon the peas Jones used the following scale of values: 
“ Digit z represents a lesion on the stem which may not greatl y damage the plant in its subsequent growth. 
“ Digit 2 represents a lesion on the stem which appears to be severe enough to greatly injure the plant in 
subsequent growth. 
“ Digit 3 represents destruction of the shoot, the root alone having made growth. 
“The sum of the digits representing all the injuries found at any temperature is taken to represent the 
total intensity of injury at that temperature. ..... 
“ In estimating the intensity of injury to cotton, the same scale was used, except that the digit 3 represents 
the destruction of the seed before germination. Thus the total number of seeds planted multiplied by $ 
represents the total destruction of plants/ 1 ’ 
