November, 1912 
HOUSE AND GARDEN 
333 
worst infested trees to the south of the 
territory the diseased insects will die and 
they will infect others, and thus spread the 
disease. When dead they should be cov¬ 
ered with a white granular powder indicat¬ 
ing this fungus disease. It is always ad¬ 
visable to plant the infected insects to the 
south of the tree, and low ground is the 
best for infection because the disease 
grows best where there is moisture. 
Dr. Roland Thaxter and his assistant, 
Mr. R. H. Cooley of Harvard University, 
have made experiments with this parasite 
that seem very effective. This work was 
carried on in cooperation with the Massa¬ 
chusetts State Foresters Department and 
the above instructions and experiment sug¬ 
gested the belief that some people might 
care to experiment themselves. 
The woodland on the estate in question 
begins on the south and east sides on 
lower ground and extends toward the 
north. This tract of timber offered the 
ideal conditions asked for in the instruc¬ 
tions. The infected material was re¬ 
ceived with instructions to distribute them 
within twelve hours. There were enough 
of the caterpillars in the small mailing 
tube sent me to plant over one hundred 
bags in the trees. This consignment was 
planted on the border of the woodland and 
as more were desired for a second line of 
bags I set about to grow some of the 
disease at home. 
A bottomless box two by three feet was 
obtained and sunk in the ground to a 
depth of two inches, leaving the box out 
of ground about a foot. The top of the 
box had a strip of fly paper around the 
inside edge to stop the caterpillars from 
crawling out, and a moist burlap bag cov¬ 
ered the box to promote the growth of the 
disease. A supply of nests were found 
and placed in the box along with some 
diseased caterpillars. Leaves were placed 
in the box for feed fresh every day, and 
the old ones removed to avoid the growth 
of other molds on the leaves. The brood 
was left in the box until they were killed 
with the disease and a fresh supply was 
placed in along with the dead ones. This 
supply was used to plant the second line 
of bags in the trees about four hundred 
feet from the first planting. Several 
colonies of the home grown diseased cater¬ 
pillars were placed in trees and bushes 
where they could be watched, and were 
found to kill the native caterpillars feed¬ 
ing in the trees in the same manner as the 
original infected material. This disease 
is a sort of mold and is one of the best 
forms that attack insects and larvae. The 
name of the parasite is Entomopkthora 
Aulicae ( Riech .), and it will act with 
more certainty on the tent caterpillar than 
on the Brown-tail caterpillars. 
The results obtained in the forest were 
similar to those obtained in the isolated 
trees used for testing the disease. There 
were but few trees in this the worst in¬ 
fested part of the woodland that were de¬ 
foliated by the spring brood of insects and 
this area extended for fully a quarter of 
a mile toward the north. Several other 
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We will mail you a compli¬ 
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you which designs to select. 
Our Colonial Book will also 
be sent if you will mention it. 
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SARGENT & COMPANY, 142 Leonard Street, New York 
Send at once for our booklet 
No. 2 on Bay State Brick and 
mark /dy 
Cement Coating protection. 
uRL 
Wadsworth, Howland & Co., 
Inc. 
82-84 Washington St., 
BAY STATE 
Boston, Mass. 
Flowers in Winter 
For forcing blooms on potted plants or flowers 
in greenhouses, use nature’s best plant food, 
Sheep’s Head Brand 
of Sheep Manure. 
Pulverized. Can be used easily as a top dress- 
in liquid form or mixed with the soil. Will 
:ause black spot. Free from weed seed. 
Send for booklet and prices. 
NATURAL GUANO CO. Dept. 19, Aurora, Ill 
KORO KRAFTS 
mills Fern Dish is one of the most satisfying articles tumerl 
1 out of the Koro Krafts Shoppe. The interesting play of 
'ight and shade due to the bosses and depressions and the way 
in which the horizontal lines are broken by the vertical lines of 
the supports and their lines by the swinging handles, make this 
product most artistic. It is made to keep water from leaking 
through. 
THE KORO KRAFTS SHOPPE, 8614 Superior Aye,, 
Cleveland, 0. 
In writing to advertisers please mention House and Garden, 
