70 
CORN. 
cwt. or so per acre; a nice sliower washed it in at once, and a 
fortnight after no one would have known it to be the same field, and 
I harvested a very heavy crop from it.” 
As far as I can gather from the observations of 1886 and ’87, and 
also from Continental practice, a good growth on properly cultivated 
land, neither too dry on knolls nor soured by being undrained, and 
also a liberal supply of rich manure, help greatly to bring the crop 
through or prevent attack. But where stock have been fed on straw 
or Clover which has suffered from Eelworm attack, it is absolutely 
necessary that the manure made from infested fodder should not be 
used on any field where crops are to be grown which are liable to 
infestation, for the following reason :—This kind of Eelworm can be 
passed through the animal along with the digesting food without 
being harmed, and therefore is just as likely as not to be carted out 
within the manure from the yards to which it was brought in within 
the straw. For this reason superphosphate or guano have been 
recommended in preference to manure which may have been made 
from infested fodder, or which may have had infested plants thrown to rot 
on the heap. 
This point is well worth attention, as it very probably accounts for 
the patches, large or small, of infestation in fields where otherwise all 
is free. In a valuable paper of researches on Tylenchus devastatrix * 
published by Dr. Ritzema Bos on July 1st, 1887, a*list is given of various 
wild and cultivated plants which are known to be liable to infestation 
of this Eelworm, and the list throws great light on the method by 
which infestation may arise. Amongst corn and grasses Oats and 
Rye are noticed as infested, and Wheat as having been found diseased 
in the same manner as Rye but much less severely. The Sweet 
Vernal Grass, Annual Poa, and Meadow Soft-grass are mentioned as 
liable to infestation, and the pest has been found to occur in small 
quantity in the Common Buttercup, the Daisy, and the Common 
Plantain known as Ribwort : likewise in Shepherd’s Cress, Sow 
Thistle, also common weeds; and the wild and the cultivated Teazel 
are both subject to attack. Buckwheat is noted as liable to severe 
attack, and the Common Onion is recorded in the list as suffering 
annually in Zeeland and South Holland from severe attack of this 
Tylenchus devastatrix. Other weeds and cultivated plants are men¬ 
tioned in the list, but at present, in this country, as far as we have 
worked out, Clover f and Oats are the only plants which suffer severely. 
Without going into further considerations, it has been clearly 
shown that where there has been an infested crop one year, it is 
* Intersuchungen liber Tylenchus devastatrix , Kuhn, von Dr. J. Ritzema Bos.— 
Biologisches Centralblatt, vii. Band No. 9, 1 July, 1887. 
+ See ‘ Clover-sickness,’ pp. 1—9 of this Report. 
