A Stem Blight of Field and Garden Peas 
35 
TABLE VI—Continued 
Observations on 25 Field Pea Plants on the Ranch of W. F. Ulray, 
Center, Colorado, June 12 to June 24, 1915 
Plant No. 
Date of Observation; 
June 12, 1915. ' 
June 17, 1915. 
June 24, 1915. 
20. 
1 
Just showing dis¬ 
ease below first 
branch. 
One entire shoot 
dead and 1 healthy; 
growth 2 in. 
No growth on old 
shoots; new shoots 
growing rapidly, 6 
in. 
21. 
1 
! 
Slight infection at 
base. 
One shoot frosted, 
1 shows trace of 
disease at 2nd in¬ 
ternode, and 1 in¬ 
fected at growing 
tip. Second shoot 
has grown 2 in. 
Growth 11/4 in. 
Plants same. 
22. 
White vine diseased 
at base; red vine 
normal. 
Disease up to 3d 
node on white vine, 
and side branch in¬ 
volved. Red vine 
normal. 
Disease to 5th node 
on white vine, 
growth 6 in. 
Red vine growing, 
6 in. 
23. 
Disease beginning 
to show on lower 
leaves. 
Th^-ee shoots: 1 
dead, 1 diseased to 
5th node, and 1 
healthy. 
Diseased branch has 
grown 1 in.; healthy 
shoot, 4 in. 
24. 
Normal. 
Leaf infectione 
common and 1 shoot 
affected to the 8th 
node. Normal stem 
has grown 2-% in. 
Little change, prac¬ 
tically no growth on 
infected stems. 
25. 
Normal. 
Three shoots: 1 
dead, 1 diseased, 
over 4 internodes, 
and 1 normal. 
Diseased shoot has 
grown 4 inches; 
normal, 6 in. 
Obserzfations, July i, ipi3 
Mr. Thomas visited this field on July 1 and found all remaining 
plants making good growth. The vines were badly matted around the 
stakes so that it was impossible to identify the particular shoots observed 
before. There was some evidence of whole plants having been killed, 
but in the majority of cases, new shoots replaced badly infected ones 
while stems with the disease on lower leaves and internodes either 
branched below the infection, or, in many cases,' continued to grow in 
advance of the disease. , 
