CHERRY DISEASES 
of protecting the cherry from this disease 
in its most damaging form. Figs. 8 and 
9 are illustrations of this method. 
Other Resistant Stocks 
Various other stocks, including the 
Morello, the Dukes and a native cherry 
(Prunus demissa) have been recommend- 
Bacteria Which Induces Gumming of 
Fig, 7, 
the Cherry. Magnified 500 Diam. 
ed as hardy and resistant stocks on 
which to work the sweet cherry, but until 
these have been tried out further, the 
writer strongly advises the use of the 
Mazzard on account of the present evi- 
dence in its favor. A word of warning 
should be given here against unscrupu- 
lous dealers who sometimes palm off seed- 
lings of doubtful lineage as Mazzards. 
There are, however, reliable nurseries 
from which satisfactory stock may be 
obtained. 
The Lambert Cherry 
The three varieties of sweet cherries 
most extensively grown for commercial 
purposes in Oregon are the Royal Ann, 
787 
Fig. 8 A Year’s Growth on a Tree Top- 
Grafted on the Limbs of Mazzard Seedling 
Cherry. Trunk and limb bases are free 
from gummosis, where this method is 
adopted. This form of crotch is undesirable. 
Bing and Lambert. These are all sub- 
ject to gummosis, but the Lambert has 
had the reputation of being less seriously 
affected than the other two. Observa- 
tions in orchards in different sections 
seem to substantiate the general opinion. 
Table Showing the Relative Effects of the Disease Upon Royal Ann, Bing and Lambert 
Trees in an Orchard near Salem, Oregon 
Total | Totally Half Badly | Moder- | Slightly! Unaf- 
Variety number jdestroyed|destroyed diseased | ately | diseased! fected 
trees | diseased 
Royal Ann........... 259 31% 13% 22% 27% 1% 0% 
BG iicctaae cos peeks 222 36% 15% 24%, 24% 1% 0% 
EMI DOT iiss 8 ok ess 259 13% 8% 9% 36% 31% 3% 
The argument in favor of the Lambert gummosis. In nearly every badly in- 
in this orchard is striking. 
In budding or grafting the susceptible 
varieties, it is a matter of good sense to 
select scions or buds from trees which 
seem particularly healthy and free from 
fested orchard there are trees of the 
Royal Ann or Bing varieties which seem 
to be healthier and freer from disease 
than the rest. Such may, perhaps, be 
more resistant than their neighbors, and 
