26 BULLETIN 250, TJ. S. DEPAETMENT OF AGRICULTURE. 



Maple-leaved Abeowwood (Viburnum acerifolium L.). 



This viburnum is not favored by the gipsy-moth larvae 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 larvae died in the 

 stage in which the experiment was started. 



In the field many larvae in all stages were noted upon the foliage, having 

 dropped from the overshadowing trees, but very little feeding was seen. 



Abeowwood (Viburnum dentatum L. ). 



This foliage is somewhat more favorable as a food for gipsy-moth larvae, as 

 those started in the second stage reached the fifth stage, but no pupse 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 lentago is more readily eaten by gipsy-moth larvae than the 

 foregoing species. A few larva? started in the early stages passed into the next 

 stage, and male adults were obtained from trays started with fourth-stage 

 larvae. Growth was very slow and all were of small size. 



No field observations were made on this species. 



Cbanberby Teee (Viburnum opulus L.). 



Field observations show slight feeding by the larvae in nearly all stages. 

 No tray experiments were conducted with this species. 



Appalachian Tea (Viburnum cassinoides L.). 



No pupae were obtained from experiments with this species in the trays. The 

 first-stage larvae 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. 



Black Walnut (Juglans nigra L.). 



Tray experiments started with first-stage larvae produced fifth-stage larvae 

 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 (Salix alba L.). 



This is among the most-favored food plants for the gipsy-moth larvae. 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 larvae, 

 adults, and egg masses were produced. 



Glaucous 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 larvae, which grew rapidly and were of 

 large size. 



No field observations were made. 



