16 BULLETIN 899; t\ S. DEPARTMENT OF AGRICULTURE. 
This condition may be greatly relieved by the application of bands 
of gipsy moth tree-banding material (PL VII) . If apple trees are 
located from 50 to 400 feet or more from a badly infested woodland 
they are liable to severe reinfestation early in the season. If spray- 
ing can not be done it has been suggested that relief might be had by f 
shaking the half -grown caterpillars from the trees that have little or 
no fruit by the use of a long pole to one end of which an iron hook is 
bolted. If this is done, the upper limbs should be shaken first fol- 
lowed by those beneath. The caterpillars removed in this manner 
will be prevented from reascending the trees by the bands and may 
be killed beneath them. 
Banding of apple trees is also sometimes advisable together with 
spraying if the trees are located in an especially dangerous position 
with regard to infestation. All cavities should be tinned or ce- 
mented before bands are applied. It is usually advisable to apply 
spray instead of bands to very young apple trees 8 years old or less, 
as such trees can be readily sprayed with any hand outfit. 
SPECIES OF INSECTS AGAINST WHICH GIPSY MOTH TREE-BANDING 
MATERIAL IS EFFECTIVE. 
Experiments have been conducted in the laboratory and in the 
field with several species of insects for information as to which native 
species of larva? and adults this material might be effective in bar- 
ring. Through cooperation the material was tried in Xova Scotia 
against adults of the fall cankerworm (Alsophila pometarui Harr.) 
by Prof. W. H. Brittain. who reports rather unfavorable results in 
barring that species. He states that where the infestation was not too 
heavy the bands worked fairly well, but where the moths appeared . 
in enormous numbers, as was frequently the case, bands 6 inches wide 
were bridged and crossed in a very short time. It is apparent that 
for the fall cankerworm the formula used for spring and summer 
banding against the gipsy moth should be modified so that it will 
remain soft during fall temperatures, at the time the cankerworms 
are active, and thus be more effective. 
Dr. A. L. Quaintance, of the Bureau of Entomology, had some of 
the material tested on peach trees at Vienna. Va., against the peach- 
tree borer (Sanninoidea exitiosa Say). He states that while s * no 
injury or ill effects to the trees could be noted after one year, it was 
only moderately successful in controlling the insect." The material ) 
was also tried in New Jersey on peach trees against the above in- 
sect by Mr. Alvah Peterson, who applied the bands 4 to 8 inches 
wide at the base of trees 10 years old or more. He reports that 
" when the trees were wormed during the fall of 1919 the check 
trees showed a total of 39 larvae (] to § inch in length) while the 
treated trees showed onlv 2 larvae below the bands. It was noted. 
