JOURNAL 
OF THE 
ROYAL HORTICULTURAL SOCIETY. 
Vol. XLIII. 1918. 
Parts II. and III. 
MILDEW-RESISTANT ROSES : WITH SOME 'SUGGESTIONS 
AS TO INCREASING THEIR NUMBER. 
By Walter Easlea, F.R.H.S. 
[Read July 17, 1917 ; Mr, W. H. Divers, V.M.H., in the Chair.] 
The subject of Rose mildew has been so ably dealt with in the past, 
both in the Journal of the Royal Horticultural Society and 
in other Journals, that I do not propose to attempt a description of 
this pest, even had I the technical knowledge to do so. My object is 
rather to ascertain if there be a possibility of increasing the number 
of mildew-resisting Roses. Should there be any representatives of 
the Sundriesmen here who do not entirely wish for mildew to dis- 
appear, even though they sell preparations that are absolute pre- 
ventives, I would assure them at the outset that, in my opinion, our 
gardens will never be absolutely free from the fungus, seeing that 
there are so many lovely varieties that are badly addicted to mildew, 
but which no amount of persuasion could induce us to banish 
from our collections, and that they can go on making their preparations 
with a certainty that there will be a demand for them. 
Yet, while I admit that much, . I am very hopeful that the many 
eminent amateur hybridists of the Rose will soon obtain for us a 
number of mildew-resisting varieties, so that to a large extent the 
fungus will be banished from our Rose gardens. 
Now, why do Roses take mildew ? It is because the leaf is 
not able to resist the spores of the fungus, which is always close 
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