12 
isolated. ‘Their distribution in the soil and their relative abund- 
ance in different localities was unknown. For this reason the 
results of the soil ha at Kew arranged the previous 
spring may be recor ere. Five aad of  Parsnips were sown 
in April 1917, and were treated as follow 
Plot A inoculated with 2 bushels of infected Evesham soil. 
Plot C inoculated with cut-up diseased roots from Evesham. 
Plot D inoculated with cut-up diseased roots from Somerset. 
Plots B and E served as controls. 
The diseased roots and soil which were obtained from Worces- 
tershire and Somerset in March were added with a view to inocu- 
ating the soil with any organisms, parasitic or otherwise, which 
might be concerned with the production of canker. The variety 
of Parsnip sown was the same as that very largely used in 
es parece a broad-shouldered form of ‘‘ Hollow Crown.” 
Preliminary ‘examination in August and September showed the 
See of many small cracks, but no marked development of 
caer The plots were finally cleared on November 12, by 
ich date a Sedetdarahte number of cankerous wounds ha 
develiined: The results are set out in the accompanying table :— 
| \ per 
; cent. 
Pot A.—Inoculated with Evesham | Sound... ... ...| 65 | 68 
soil (total number of plants = 96). | Cracked — Reoby 18 
_Cankered or r commencing 14 14 
to canker 
Piotr co eae (total number of! Sound _... “a pe a 3 58 
plan 178). | Cracked 42 23 
C ankered or commencing. 33 19 
to canker 
ners C.—Inoculated with iscened Sound __... se ee OU 66 
oots from n Kvesham (totalnumber | Cracked 3 17 
of Eakin = 76). | Can nkered o1 or aed 13 17 
| 
a D.—Inoculated with diseased| Sound... ane eis Oe 63 
from Somerset (total number | | Cracked . 22 22 
oF plants = 99). | Cankered or r commencing | 15 15 
te nker 
Piotr ter (total number of | Sound __.., La Pip tP ee 70 
plants — 168 | Cracked . 26 15 
| Cankered 0 or r commencing 24 15 
to canker 
From the above it will be seen that from 15-23 per cent. of 
the cracking occurred in all plots, and from [4-17 per. cent. of 
canker. he figures for the latter are high, but except in plot C 
the canker was in an early stage, and the root were marketable 
and not a apeerciably damaged. In plot C eight roots had bere 
decayed, but from the presence of equally severe injury 
in some neighbouring plots (not included in the experiment) this 
