THE NATIONAL NURSERYMAN 
169 
Newport, R. I., May 10, 1919. 
The National Nurseryman, 
Flourtown, Penna. 
Gentlemen:— 
Just a word regarding street trees, referring to article 
which appeared in last issue, page 130. 
It may surprise you, as it did me, that the Oriental 
Plane has proved a failure in this section both as a street 
tree or for any other purpose when submitted to a 
weather test such as was experienced in the winter of 
1917-1918. Whole rows of them were split open—the 
result being a dying hack of tops in summer of 1918, in 
fact some of them were killed back to the ground. 
Maples in variety however, showed no ill effects. 
Sugar Maple it should be said does not do well 
planted near the ocean—but inland nothing finer can be 
seen—a few^ miles is sullicient to make the difference be- 
tw^een success and failure. 
The Norway Maple is still the favorite street tree here- 
and does remarkably well, and is much to be preferred to 
the Silver Maple, which is good in its way only for im¬ 
mediate effect, and can be removed when suitable trees 
have made sufficient headway. The Sycamore Maple is 
also good for temporary wmrk, they grow coarse wn’th age. 
Yours truly 
Alexander MacLellan. 
SCENT 
Civilization has deprived most people of almost all 
primeval powers of smelling, but to those who are 
blessed with any keen olfactory power, the scents of the 
garden are one of its greatest joys. 
We think that many nurserymen and seedsmen do not 
make enough of this jioint in their catalogues and de¬ 
scriptions of novelties, and so miss what would be a 
strong pull with many buyers. 
Being among those rather favored in respect of smell¬ 
ing powers (or perhaps we should regretfully add, hav¬ 
ing been), we were pleased to note the other day that 
Mr. Hicks, in his charming rose exhibit at the R. H. S., 
called special attention to the new roses which excelled 
in the matter of perfume, and it waS plainly evident that 
the hint secured an eager response from the public. 
We feel sure that more attention to this point would be 
a paying proposition. Our Carnation men might give 
more prominence to it than they do.* The same remark 
applies to other things, for instance, the delicious scent 
of Prinee of Austria Tulip and a few^ other sorts is often 
passed over, and in Paeonies, some are highly favored, 
while others are almost nasty. 
Has anyone yet paid proper attention to the varied 
scents of Narcissus? We were reminded of this a few 
days ago by noting the rich tropical perfume of “White 
Lady,” almost reminding one of a Tuberose or Stephan- 
otis.. 
There is a wide scope for obseiwation in this line 
among shrubs and trees. Has anyone ever noted in a 
catalogue the delightful scent given off by the dying 
leaves of the Bird Cherry [Cerasuc padus)! We pass a 
tree en route to the office, and have often stood a few sec¬ 
onds to inhale and enjoy the fragrance, and wondered 
whether this charm were generally appreciated. 
To multiply instances would be tedious. Our idea is 
that all nurserymen should jiromptly note them when en¬ 
countered for the next issue of their catalogue, and so 
add something to the joy of life for garden owners, and 
incidentally to their profits in business.— Horticidf.nral 
Advertiser. 
i:XPERIMENTS IN THE CONTROL OF THE ROOT 
FORM OF THE WOOLLY APPLE APHIS 
B. R. Leach 
A series of experiments conducted in Virginia during 
the seasons of 1914 and 1916, the w ork being based upon 
results obtained by French investigators in the employ¬ 
ment of carbon disulphid and sodium cyanid in solution 
against the grape phylloxera. The results have been 
summarized by the author as follow^s; 
“Carbon disulphid, in solution at the rate of .06 oz. to 
4 gal. of water and applied at the rate of 0.76 gal. per 
square foot of soil, will control the root form of the 
woolly aphis under suitable soil conditions. The liquid 
is best applied by preparing shallow basins about the 
tree and should be applied only w hen the soil is in a moist 
condition. The solution is best ])repared by pouring the 
carbon disulphid into the water and agitating vigorously. 
The carbon disulphid thereby breaks up into small glo¬ 
bules, some going into solution and the remainder form¬ 
ing a mechanical mixture with the solution. The gas dif¬ 
fuses laterally and vertically only as far as the liquid 
penetrates and therefore every square foot of infested 
soil must be subjected to the action of the solution in or¬ 
der to insure complete control. When used at the fore¬ 
going rate the carbon disulphid produced no injury to 
the roots of apjjle. The treatment may be made at any 
time during the growing season except during the ])eriod 
of twu) or three weeks in the spring when the trees are 
budding out. In orchard practice the solution is best 
applied by using a power spraying outfit and twm aux¬ 
iliary tanks. 
“The advantages of this method are, first, the even 
diffusion of the liquid and complete aphid mortality in 
the soil area treated and, second, the safety w ith which 
the disulphid can be used. The disadvantages of the 
method are, first, the huge amounts of w^ater required, 
with consequent high cost of labor; second, the difficulty, 
on any but level ground, of jireparing basins with level 
floors, thus insuring the proper distribution of the liquid 
over the area to be treated; and, third, the wide area of 
infested roots on older trees, every situare foot of which 
must be treated with the liquid. This last condition pre¬ 
cludes the use of carbon disulphid except on small trees 
wdth restricted root areas. 
“Sodium cyanid at the rate of 0.6 oz. to 4 gal. of water 
did not kill the woolly aphis in the low er soil depths even 
when a superabundance of solution per square foot was 
employed. No injury to apple roots resulted when the 
material was employed at this strength. The only ad¬ 
vantage this material possesses, as compared with car¬ 
bon disulphid, is its ready solubility in water. On the 
other hand, its uncertainty in producing aphid mortality 
in the lower soil levels, together with the extremely pois- 
