304 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 16 
Table of Hessian Fly Parasitism by Platygaster hiemalis Forbes 
Miami County Experiment Farm (West Central) 
Percent of plants 
Percent of fly 
Year 
Date Sown 
infested with fly 
parasitized 
Average 
1920 
Sept 15 
90% 
85%) 
1921 
15 
57% 
81%f85% 
1922 
15 
• 54% 
89 %) 
1919 
Sept 22 
100% 
57% ) 
1920 
22 
80% 
38% f 
1921 
22 
4% 
65% ( 61% 
1922 
22 
27% 
84% ) 
1920 
Sept 29 
37% 
6%) 
1921 
Sept 29 
0% 
U% 
1922 
Sept 29 
0% 
) 
Hamilton County Experiment Farm (Southwestern) 
1922 
Sept 18 
68% 
67% 
1922 
Sept 25 
37% 
21% 
Bryan, Ohio (Northwestern) 
1921 
Sept 15 
90% 
90% 
1921 
Sept 17 
59% 
46% 
1921 
Sept 19 
47% 
41% 
1921 
Sept 21 
6% 
6% 
1921 
Sept 23 
0% 
With such an interpretation of parasite behavior, we are lead to be¬ 
lieve that hessian fly control is at present largely in the hands of the 
farmer and his willingness to cooperate. This has been demonstrated 
to us and we must assume our responsibility in interpreting sufficiently 
in advance of the need for action that there will be such need and put 
it in the hands of the farmer. The present farm organizations within 
the county make the work of the entomologist easier and the responsi¬ 
bility greater. 
A NEW APPLE BUD-MOTH IN PENNSYLVANIA 
By S. W. Frost, Pennsylvania State College 
Abstract 
A new apple pest (Sparganothis idaeusalis Walk.) is brought to the attention of 
Entomologists. The species has been found abundant during the past five years. 
Brief life history notes are given showing that it resembles the Eye spotted Bud- 
moth, very much in habits. Reference is made to related feeders on apple and other 
fruits. 
During the past five summers the writer’s attention has been drawn 
to a new injurious feeder of apple, Sparganothis idaeusalis Wlk. It 
has been known to science for a long time as a general feeder. Fernald 
(1882) records it as a feeder on Black Haw ( Viburnum prunifolium) and 
Blood root (Sanguinaria sp.). Mr. August Busck, of the United States 
National Museum, has unpublished records of the following food-plants: 
Blackberry ( Rubus sp.), Osage orange ( Maclura pomifer) Golden rod 
