=========+========+=========+==========+========+========+==========
| Number | Average | Number | Point |Diseased| Pycnidia
| of |height of| of | of |bark on | on wood
Number. |vigorous|vigorous | diseased |disease | stump. | of stump
|sprouts.| sprouts | sprouts. | on | |(creosoted
| | (feet). | |sprouts.| | portion).
---------+--------+---------+----------+--------+--------+----------
1, | 14 | 5 | | | Yes |
2, | 8 | 5 | 1 | Base | Yes |
3, | 8 | 5 | | | |
4, | 6 | 6 | | | |
5, | 4 | 4 | | | |
6, | 4 | 5 | | | |
7, | 5 | 6 | | | |
8, | 3 | 3 | | | |
9, | 12 | 5 | 1 | Base | Yes |
10, | 7 | 7 | | | |
11, | 4 | 6 | | | |
12, | 3 | 5 | | | |
13, | 1 | 3 | | | |
14, | 6 | 6 | | | |
15, | 2 | 5 | | | |
16, | 5 | 3 | | | |
17, | 2 | 4 | | | |
18, | 6 | 5 | | | Yes |
19, | 2 | 4 | | | |
20, | 4 | 3 | | | |
21, | 4 | 6 | | | |
22, | 6 | 7 | | | |
23, | 10 | 7 | | | Yes | Yes
24, | 3 | 5 | 2 | Base | Yes |
25, | 1 | 4 | | | |
26, | 3 | 4 | 1 | Base | Yes |
27, | 8 | 5 | | | |
+--------+---------+----------+--------+--------+----------
Average, | 5.2 | 5.2 | 0.035 | | |
| | |of sprouts| | |
| | | | | |
| | | 0.148 | | |
| | | of stumps| | |
---------+--------+---------+----------+--------+--------+----------
No pycnidia were found on wood of peeled stumps after creosoting,
except in one case, where a large area of inner bark adhered to the
stump at time of creosoting, and later raised up, exposing an untreated
wood surface. The inner side of this bark and the uncreosoted area of
wood were covered with pycnidia. Creosote painted on thick bark at the
base of stumps or on an exposed root does not appear to hinder the
growth of the fungus. Hence, since stumps can be peeled but a very
short distance below the soil, especially in winter, it is believed
that creosoted stumps are more apt to have infected sprouts after a
few years than burned stumps. The danger point is at the ground line,
and exposed roots and the crotches at the collar between roots are
especially liable to have areas of bark that are missed in peeling. If
this bark becomes affected, it brings the disease very close to the
young sprouts that spring up around the stumps, and sooner or later
causes infection.
The stumps in Table III were burned in December, 1912. The data given
below are the result of an inspection made December 12, 1913.