THE NATIONAL NURSERYMAN 
442 
PINES ATTACKED BY NEW DANGEROUS EUROPEAN 
INSECT 
Trers in Eastern Slates Injured and Department Recom¬ 
mends Immediate Treatment for Control. 
The U. S. Deparliiient of Agriculture is calling atleii- 
lioii to the introduction and establishment in America of 
the European pine shoot moth, which threatens to cause 
serious loss. This insect is a small orange-red moth, the 
larva of which hollows out new buds and kills or injures 
the ends of twigs of pine trees. This injury causes a de¬ 
formity which is serious in ornamental trees, and in trees 
grown for lumber makes a crooked growth and a conse¬ 
quent waste when the tree is cut. 
In Europe the insect not only attacks all native pines 
but is equally injurious to American species cultivated 
there. The Department states that the young larvae came 
into this country within the buds on imported pine seed¬ 
lings which have come from France, England, Holland, 
Relgium, or Germany. The department’s investigators 
have discovered it in only ten localities, in six states from 
Massachusetts to Pennsylvania, but it is likely that it 
may be found in other localities. It has not been found in 
any native trees in the forest, and with only one excep¬ 
tion has always been on European pines in nurseries and 
private parks. There is no evidence to indicate that it 
has been in this country more than a year except on Long 
Island, where it has existed for more than two years. 
There are several native pine shoot moths, but none of 
them inflict the serious injury of the European species. 
The Department hopes that the new pest may be 
stamped out before it becomes too widespread to be con¬ 
trolled. At present the problem of its elimination is con¬ 
fined mainly to nurseries, but if it once gets into the na¬ 
tive pine forests the experts think that it would be beyond 
control. In its larval stage the moth is so eflectively pro¬ 
tected in the buds and shoots that it can not be reached 
by any insecticide, and the only method of getting rid of 
it is to prune out and destroy the shoots which contain 
the insect. This should preferably be done during the 
fall and winter. Though it is easier to locate the injured 
tips and shoots after growth has started in the spring, it 
is safer and better for the tree to have it done in the fall. 
Measures for control, to be effective, can not be accom¬ 
plished without the co-operative action of all who grow 
or plant European pines or deal in them. 
Further information in regard to the insect may be ob¬ 
tained by application to the bureau of entomology, Wash¬ 
ington, D. G. 
NOTICE OF PUBLIC HEARING 
The Department of Agriculture has information that a 
dangerous disease of citrus plants known as the Citrus 
Canker may be introduced at any time into the United 
States with citrus nursery stock, buds, scions or seeds. 
This disease has already been brought to this country. 
apparently on Japanese nursery stock, and is becoming 
established in the Gulf citrus region of the United States, 
including Florida. In the latter State most strenuous 
efforts, at great cost, which probably will be successful, 
are being made to stamp it out. 
In view of the tremendous value of the citrus develop¬ 
ment in the United States, and the very serious possi¬ 
bilities of this and other citrus diseases, it becomes the 
duty of the Secretary of Agriculture to consider the ad¬ 
visability of restricting or prohibiting the importation of 
citrus nursery stock, buds, scions or seeds, from all for¬ 
eign countries. 
Under Section 7 of the Plant Quarantine Act of Au¬ 
gust 20, 1912, a public hearing will be held at the Depart¬ 
ment of Agriculture, Washington, D. C., at 10 o’clock on 
December 8, 1914, in order that all persons interested 
may have an opportunity to appear and be heard con¬ 
cerning the establishment of a (luarantine on all citrus 
nursery stock, buds, scions, or seeds, coming to the 
United States. 
“National Nurseryman” 
Gentlemen:— 
Under separate cover we are sending you sprays and 
leaves of Viburnum nudum picked to-day, latitude 44. 
,This Viburnum is one of the most handsome and decora¬ 
tive shrubs in our nursery. Note the varied shapes, sizes 
and colorings of the leaves and the beautiful autumn 
tints. This Viburnum is also called the Large Wythe Rod 
and is closely related to V. cassinoides which it excels 
for beauty in this latitude in foliage, bloom and fruit. 
The Viburnwns are the greatest family of shrubs for 
decorative purposes, for planting in the north, for foliage, 
bloom and berried effects. About 20 species are hardy 
north and but few are in general cultivation. V. opulus, 
V. Americanum (oxycocus) V. opulus sterilis are 
about all the Viburnums generally offered by nursery¬ 
men. A few nurserymen are offering V. cassinoides, V. 
dentatum, V. lantana and V. lentago. Viburnum venosum 
is probably what is being offered by some nurseiymen as 
V. molle. A letter recently received by us from Prof. C. 
S. Sargent, states that V molle is rare and not in cultiva¬ 
tion. Yours truly, 
A. H. Lake. Henry Lake Sons Co. 
VIBURNUM NUDUM 
A. H. Lake, Black River Falls, Wis., sent foliage of 
Viburnum nudum to the editorial office calling attention 
to this splendid shrub. The Viburnums are perhaps the 
choicest group of our ornamental shrubs. 
The common Snowball V. opulus sterilis is well known 
to everyone. The Japanese Snowball V. plicatum also is 
extremely popular. The flowers no doubt being largely 
responsible, but as Mr. Lake says there are others equally 
deserving of attention and none more so that the subject 
of this article. 
When a plant has merit there is usually some reason 
why it does not find its way into general use, often it is 
because it will not adapt itself to varying conditions of 
soil and climate, or perhaps it is difficult of propagation 
and stock is not available for the planter. 
Bailey’s Cyclopedia gives the habitat of V. nudum 
