THE NATIONAL NURSERYMAN 
135 
- 
diseased. In individual cases this undoubtedly works hard¬ 
ship to the nurseryman, but, on the other hand, to allow 
him to sell galled trees injures the fruit grower, serves to 
distribute the infection broadcast, and tends to destroy his 
own reputation. The nurseryman’s remedy lies in careful 
methods and the abandonment of infected soils. 
By no amount of 
special pleading can it 
be made to appear 
that an infectious 
disease should be tol¬ 
erated on nursery trees 
offered for sale simply 
because it is rather 
prevalent and is in¬ 
convenient to deal 
with. Before the nur¬ 
se r y m a n can b e 
allowed to sell such 
trees without restric¬ 
tion he must establish 
conclusively that it is 
not injurious, and not 
transmissible to suscep¬ 
tible species. 
We are disposed to 
include apple trees also 
in this recommenda¬ 
tion. While these seem 
to be less subject to 
crowngall in a serious 
form than some other 
plants, frequently they 
do not make good 
trees, and our cross¬ 
inoculations suggest, at 
least, that they may 
serve to carry the dis¬ 
ease to other plants 
and into localities 
previously free from 
it. Moreover, even 
when the apple gall 
does not itself seriously 
injure the tree it may 
serve, as we have seen, 
for the entrance of 
other parasites. 
In some cases the 
inspector will be in 
doubt whether to con¬ 
demn stock or pass it, particularly when the trees have 
been carelessly grafted and show more than the ordinary 
amount of callus. He may then either refer the specimens 
to some more experienced pathologist or refuse to take 
chances. Until we know to the contrary excessive callus 
should be regarded as incipient gall. Ordinarily there will 
be no difficulty in determining whether or not a given lot of 
trees has crown-gall or hairy-root, except when the nursery 
stock has been dishonestly pruned before shipment to 
remove signs of the disease, and then usually some traces 
will be left. In case trees are improperly condemned there 
is always a remedy at law.” 
Referring to the article contained in our March issue 
regarding the thirty- 
sixth annual conven¬ 
tion of the American 
Association of Nurserv- 
•/ 
men, we are able to 
add a little more infor¬ 
mation. The official 
program is not y e t 
compiled but enough 
has been said by Mr-. J. 
H. Dayton, chairman 
the committee, to in¬ 
dicate that it will be 
of exceptional quality. 
Members, we under¬ 
stand, are to have the 
great privilege of 
listening to such dis¬ 
tinguished speakers as 
Professor William 
Trelease, director of 
the Botanical Gardens, 
and to Professor Hun¬ 
ter; also a possible 
address from ex-Gov- 
emor Handley. The 
committee is limiting 
its part of the program 
to half-day sessions, 
and, besides the num¬ 
bers referred to, will 
have a few short 
papers on practical 
subjects by practical 
men, with some live 
discussions. 
There will be no rail¬ 
road certificates, the 
large guarantee re¬ 
quired by the passenger 
associations making it 
prohibitive. However, 
tourist rates will be 
available from central 
points, and members 
are urged to seek early conference with their ticket agents. 
Secretary John Hall will issue the official circular with 
program as soon as heVeceives from the various committees 
the particulars of their departments. In the meantime, he 
asks that members show their thoughtfulness by sending in 
their membership dues and also in placing their applications 
for space in the badge book. His address is 204 Granite 
Building, Rochester, N. Y. 
B. 
Plate XXXI. Bul. 213. Bureau Plant Industry, Dept, of Agr. 
Limb of Spitzenburg apple from Oregon, attacked by a hard gall, introduced to 
show a secondary infection by the pear blight organism (B. amylovorus) radiat¬ 
ing from the gall. X. Y. Blighting areas covered by the bacterial exudate. 
Destructive galls on blackberry received from Prof. L. R. Jones, Madison, Wis., 
Autumn, 1910, 
