/ 
The National Nurseryl^^h. 
FOR GROWERS AND DEALERS IN NURSERY STOC 
Copyright, 1893, by The National Nurseryman Publishing Co. 
r. 
VOL. II. 
ROCHESTER, N. Y., AUGUST, 1894. 
NO. 7- 
A PROMISING FIELD. 
P'rom time to time this journal has called attention to 
the wonderful progress in horticulture made in Colorado. 
That state is a promising field for the nurseryman. The 
success in growing fruit of all kinds there has led to a gen¬ 
eral agitation of the subject. Capitalists have already 
secured large tracts of land for the purpose of planting them 
to orchards of various kinds. Climate and soil appear to 
be especially adapted to the growth of fruit, with the aid of 
irrigation where needed. 
In its issue of June 7 /ie Hortiadtiirist, published quart¬ 
erly at Grand Junction, Colo., says : “ During the three 
months since the appearance of our first number, the envi¬ 
ous fates have visited the orchards of California with a kill¬ 
ing frost, have sent the blizzard and cyclone to disenchant 
the horticulturists of the middle and northern states, while 
in the South unexpected cold waves and terrific winds have 
rounded out a season of disaster unparalleled in the horti¬ 
cultural history of the country. It is vain to dwell upon 
our immunity from these and kindred evils or to dilate upon 
the weather report for this region, which has been religious¬ 
ly kept tor the last ten years ; the facts and results can be 
learned by all. We are not puffed up witn pride, but calmly 
point to the record. To-day, as we write, the orchardists 
are engaged in the pleasant toil of thinning the superfluous 
fruit from thousands of young trees that could not with¬ 
stand the weight its maturity would bring, and in glancing 
over the results achieved in the last three months we find 
as incidents of our progress and omens of future advance¬ 
ment that a steady stream of land buyers has been all that 
time invading this valley with horticultural designs ; that 
over three hundred tracts of fruit land in size from five to 
one hundred and sixty acres have changed hands and passed 
into the possession of owners who have commenced to im¬ 
prove them ; we note an increase in the number of pumping 
plants and the extension and enlargement of canals for irri¬ 
gation purposes.” 
On the opposite page are presented two cuts illustrating 
Colorado horticulture. The first is that of a three-yeai -old 
apple tree in the orchard of J. R. Penniston, White Water, 
Mesa County. The second is that of a three-year-old peach 
tree at Grand Junction. They speak for themselves. 
PEACH YELLOWS IN NURSERY STOCK. 
A recent bulletin of the United States Department ol 
Agriculture gives the following conclusions regarding peach 
yellows in nursery stock : 
When the disease appears in young trees, and particu¬ 
larly in a region previously free from yellows, there is good 
reason for suspecting the nursery, it having been established 
by repeated experiments that the disease may remain dor¬ 
mant for some time in buds cut from affected trees and after¬ 
wards appear in the trees grown from such buds. The bud 
from which this shoot originated was cut in July from a 
very robust, thrifty watershoot on a healthy-looking branch 
of an affected tree. Nothing could exceed the vigor and 
beauty of this watershoot, and yet its buds contained the 
virus of the disease, which late the same season induced 
many of the winter buds of the daughter shoots to grow as 
here shown, although the original buds were set into 
healthy and vigorous seedlings, which had tops of their 
own. Of course all of these buds would have remained 
dormant until the following spring if the shoot had been 
derived from a healthy bud. Just how long the disease may 
remain in nursery trees without showing symptoms is un¬ 
known. In badly affected regions, where the likelihood of 
getting diseased buds is greatest, it is not uncommon to find 
affected trees in the nursery rows the following season, and 
experience and experiment leave no room for doubt that 
others showing no symptoms will develop them afterwards 
when set in orchards. The disease is also readily trans¬ 
missible to healthy stocks, and can be made to finally de¬ 
stroy all parts of a healthy tree by the insertion of a dis¬ 
eased bud. The disease first appears in that part of the 
stock next to the inserted bud and subsequently in remoter 
parts. How soon the stock becomes affected depends in 
great measure on the character of the inserted bud. If 
this be taken from a plainly diseased shoot the symptoms 
appear in the stock sooner than if the bud is taken from such 
a vigorous shoot as that mentioned above. In either case 
o 
the progress of the disease is slow. So far as yet known 
this transmission of the disease from bud to stock can take 
place only when there is a union of tissues ; mere contact, 
even when close and prolonged, not transmitting the disease. 
Under favorable conditions such a seedling lived nearly five 
years after the insertion of the diseased bud, but never made 
much growth. 
That yellows is also transmitted in some other way must 
be apparent to anyone who has studied the disease at all 
carefully. In badly affected districts the disease makes a 
clean sweep, and it is impossible to believe that all or even 
a majority of these trees brought the disease with them from 
the nursery. The well-established fact that tiees with the 
soundest constitution readily take the disease, proves that 
in .such cases the cause of the disease must exist in the 
