THE PINK BOLLWORM. 
13 
After a variable time, as lias been indicated, the larva transiorms 
mto a pupa or chrysalis. This stage lasts from 10 to 20 da} 7 s and then 
the moth emerges. The life of the moth is rather short. Under 
favorable conditions Mr. Busck succeeded in keeping some specimens 
alive for 32 days, but under the same conditions the great majority 
of the insects died in from 14 to 20 days. 
The moth is seldom seen in nature. Its habit is to hide during 
the day under stones or brush. The normal time of flight is from 
6.30 to 8 p. m. 1 Although apparently capable of prolonged flight, 
they prefer to go no farther than the first cotton field. The moth is 
so quiet in its habits and so easily overlooked that many may occur 
Fig. 10. — Typical holes made by pink bollworms through cotton-boll carpels. 
unnoticed in the field. In fact Mr. Busck states that frequently he 
walked through cotton fields in the Hawaiian Islands where the 
moths had been emerging daily for an indefinite time, and where 
many thousands must have been present, without seeing a single one. 
Statements to the effect that the pink bollworm is attracted to lights 
have appeared in the literature. Mr. Busck paid particular atten- 
tion to this point and demonstrated that in Hawaii lights have no 
attraction whatever for the insect. In fact, the moths were clearly 
repelled by light, In Egypt experiments have shown some degree 
of attraction to light but not enough to form the basis for control 
measures. 
1 Standard time. 
