20 BULLETIN 250, U. S. DEPARTMENT OF AGRICULTURE. 
Rock CHESTNUT OAK (Quercus prinus L.). 
This species is not common in the infested area, but wherever found the ob- 
servers were unanimous in their reports that it is very favorable food. 
The same conclusions were drawn from the tray experiments. The larve fed 
freely in all stages, growth was rapid, and they attained large size. A good 
percentage reached the adult stage. 
DwarRF CHESTNUT Oak (Quercus prinoides Willd.). 
No observations were made on this species in the field. 
The larve fed freely in the laboratory during the first two stages. It then 
became necessary to discontinue the experiments, as the specimen trees were 
sprayed. It is undoubtedly a favored food plant. 
Bur Oak (Quercus macrocarpa Michx.). 
‘Larve fed freely on this foliage in all stages and grew rapidly, but all died 
of disease by the time they reached the sixth stage. 
No field observations were made on this species. 
Pin Oak (Quercus pdlustris Du Roi). 
Larve fed on this foliage freely in all stages in the trays, especially in the 
first stage, but none reached the adult stage on account of disease. 
No field observations were made on this oak. 
Post Oak (Quercus stellata Wang.). 
Trays started with newly hatched larve on this foliage produced adult moths. 
Larve fed freely in all stages. 
No field observations were made on this species. 
Rep Oak (Quercus rubra L.). 
This is one of the most abundant oaks and the records of fieid observations 
are voluminous. All are agreed that the larve feed ravenously on it in all 
stages and that large vigorous larve are produced. This is usually one of the 
first species to be entirely defoliated in a mixed growth. 
In the trays the larvee fed freely in all stages and good reproduction resulted. 
SCARLET OAK (Quercus coccinea Wang.). 
In most of the infested territory this oak is found to some extent and all are 
agreed that it is eaten by larve in all stages, but usually not quite as freely as 
white, red, or black oak. 
Tray work shows it to be a favorite food, as a good proportion of larve went 
through to the adult stage. 
BEAR Oak (Quercus ilicifolia Wang.). 
As a food for gipsy-moth larve this is one of the most favored oaks. Not all 
the observers had this species in their divisions, but those that did agree as to 
the favorability. 
In the tray work the same thing was shown, as the larve fed freely in all 
stages. 
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