GIPSY MOTH WORK IN NEW ENGLAND. 15 
II. — Species favored by the gipsy-moth larvae after the first stage: 
Chestnut. 
Hemlock. 
Pine, hard.' 
Pine, red. 
Pine, white. 
Spruce, black. 1 
Spruce, Norway. 
Spruce, red. 
Spruce, white. 1 
III. — Species not favored by the gipsy-moth larvae but capable of 
supporting it: 
Beech, blue. 1 
Birch, black. 
Birch, yellow. 
Cherry, black. 
Elm/ 
Gum, black. 1 
Hornbeam, hop. 
Maple, red. 1 
Maple, silver. 1 
Maple, sugar. 
Pignut. 
Shacrbark. 
IV. — Species unfavored by the gipsy-moth larvae in all stages: 
Arborvita?. 
Ash, black. 1 
Ash, white. 
Butternut. 
Cedar, red. 1 
Cedar, white. 
Fir, balsam. 1 
Hackberry. 1 
Locust, black. 
Locust, honey 
Sycamore. 1 
Tulip. 
i Species of low commercial value. 
During 1914 many food plants were tested which do not ordinarily 
occur in New England except when planted for ornamental purposes. 
They grow to a greater or less extent in other sections of the United 
States, and it was desired to make these tests in order to determine 
whether these plants would be seriously damaged by the gipsy moth 
in case it should spread from New England. The information is also 
useful as a guide to the method of treatment which should be applied 
in case a small colony should become established in some region 
outside the present infested area. During the first two summers 
that these experiments were carried on a sublaboratory was main- 
tained at Worcester, Mass., where check experiments were con- 
ducted. The food-plant work is now nearly completed and the 
results will be brought together shortly for publication. In con- 
nection with these experiments it should be said that a large number 
of observations have been made in the field each summer relative to 
the favorability of different species of trees and undergrowth to 
gipsy-moth attack. This information serves as a check on the 
laboratory experiments which are carried on under artificial condi- 
tions. The observations in the field have in the main been made in 
definite areas, which were selected for an entirely different purpose 
and will be considered under the next experimental project. 
