26 BULLETIN 250, U. S. DEPARTMENT OF AGRICULTURE. 
MAPLE-LEAVED ARROWWOOD (Viburnum acerifolium L.). 
This viburnum is not favored by the gipsy-moth larve in any stage, as shown 
by the field observations and the tray work. 
In the trays none reached the adult stage, and nearly all the larve died in the 
stage in which the experiment was started. 
In the field many larve in all stages were noted upon the foliage, having 
dropped from the overshadowing trees, but very little feeding was seen. 
ARROWWoOOD (Viburnum dentatum L.). 
This foliage is somewhat more favorable as a food for gipsy-moth larve, as 
those started in the second stage reached the fifth stage, but no pupz were 
obtained. 
In the field but few observers had opportunity to obtain notes on this species. 
They have made record of slight feeding in nearly all stages. _ 
SWEET VIBURNUM (Viburnum lentago L.). 
The foliage of Jentago is more readily eaten by gipsy-moth larve than the 
foregoing species. A few larve started in the early stages passed into the next 
stage, and male adults were obtained from trays started with fourth-stage 
larve. Growth was very slow and all were of small size. 
No field observations were made on this species. 
CRANBERRY TREE (Viburnum opulus L.). 
Field observations show slight feeding by the larve in nearly all stages. 
No tray experiments were conducted with this species. 
APPALACHIAN TEA (Viburnum cassinoides L.). 
No pup® were obtained from experiments with this species in the trays. The 
first-stage larve died after reaching the third and fourth stages, and the second- 
stage experiments were closed in the fifth and sixth stages. 
In the field no feeding was observed except a few small notches in the leaves. 
BLAacK WALNuT (Juglams nigra L.). 
Tray experiments started with first-stage larve produced fifth-stage larve 
before they finally died. In the earlier stages very little feeding was done, but 
it increased considerably in the later stages. It is not a favorable food plant. 
No field observations were made. 
WHITE WILLOW (Sdalie alba L.). 
This is among the most-favored food plants for the gipsy-moth larve. In the 
- trays a good number of adults of both sexes were obtained. 
In the field all stages were observed feeding on the foliage, and large larve, 
adults, and egg masses were produced. 
GLAuUCOUS WILLOW (Salix discolor Muhl.). 
This species is also a favored food plant. In the trays a good number of 
adults were obtained from first-stage larve, which grew rapidly and were of 
large size. ‘ 
No field observations were made. 
