THE GRAXAEY WEEVIL 
NATURE OF INJURY 
The granary weevil is destructive to grain (figs. 2 to 4) and grain 
products (fig. 5) in both its adult and larval forms. The adults feed 
throughout their long lives and may occasion as much injury as their 
larva 3 . The adults will feed upon many seeds and manufactured 
cereal products and are found in flour. They do not oviposit in 
any loose and finely divided grain particles too small to serve as food 
for the development of a single larva. Thus flour and similar mate- 
rials, like semolina used in the manufacture of macaroni, may be fed 
upon by the adult weevil but not by the larvae unless the substances 
become caked by long standing, in which case they are used by the 
adult weevils as suitable materials for the rearing of their young. 
Fig. 2.— Injury to pearled barley resulting from development of larva? and feeding of adult beetles 
of the granary weevil in making exit from kernels 
Ordinarily when adult weevils are found crawling over sacks of flour 
and similar finely divided grain products they are migrating from 
near-by infested grain in the berry, and their presence will not cause 
injury except that uninformed buyers, on noting the presence of 
the weevils, may refuse to purchase or may insist on a lower 
price. The writers have known of instances where flour-mill owners 
nave incurred considerable expense to hand-pick granary weevils 
from sacks of freshlv manufactured flour standing overnight in the 
mill. ° 
The adult weevil may become established and cause loss in cartoned 
grains like pearled barley (fig. 2). In an instance recently called to 
the attention of the writers a considerable shipment of pearled barley 
in small cardboard cartons was found to be infested with the granary 
