s 
BULLETIN 1397, U. S. DEPARTMENT OF AGRICULTURE 
studying the life history and habits of the pink bollworm. The 
following statements regarding the life history and habits of the 
Fig. G. — Cotton Locks 
showing typical injury by the pink bollworm (I'ectinophora 
yos$yi)i( lla) 
pest are based upon Busck's paper (<?), and subsequent observations 
by a number of entomologists in Mexico. 
The eggs of the pink bollworm are laid singly or in groups on 
all parts of the plant above ground, about 50 per cent of them being 
In Mexico the favored position is at the 
laid on the green bolls. 
«fi»e«d 
Fig. 7. Cotton seed containing pink bollworms. opened t<> show the cells. Both the 
single and double seeded cells are shown, the double seeded ones being broken apart 
base of the boll, between the boll wall and calyx. Often more than 
50 eggs and shells have been found on a single boll. It is estimated 
