368 PESTS OF THE HOUSEHOLD AND STORED PRODUCTS 
The Pea Weevil (Lara (Bruchus) pisorum L.) 
The adult pea weevil is similar in appearance to the bean weevil, 
but is a little larger and has a shorter thorax. The grubs live in 
peas, hatching from eggs laid on the pods early in the season by the 
adults, while the peas are still in 
the field. Unlike the bean weevil 
this pest never goes on breeding in 
the dried, stored product. 
The grubs are in the peas when 
they are gathered. In the South 
the adults emerge before the next 
planting time, but in the North the 
insect is still in the seed when it is 
planted. 
Emergence of the adults may be 
accelerated by keeping the peas in 
a warm place. Seed may be held 
over for a season. The best treatment, however, is fumigation with 
carbon bisulphide or carbon tetrachloride. 
Fic. 588.—The Pea Weevil. En- 
larged and natural size. Original. 
Weevils in Nuts 
The white, thick grubs often found in chestnuts, pecans, and hickory 
nuts are familiar to all. Their exit holes also, where the mature grub 
has cut its way out through the shell, are commonly recognized. 
The adults of these grubs are beetles, one fourth to one third inch 
long, yellowish in general color with darker markings, and charac- 
terized by an extremely long snout, slender as a pin. Biting jaws are 
located at the end of the snout. 
There are three species concerned: the Larger Chestnut Weevil 
(Balaninus proboscideus Fab.); the Chestnut Weevil (Balaninus 
rectus Say); and the Pecan, or Hickory Nut Weevil (Balaninus 
carye Horn.). All are similar in appearance, and their habits are 
much the same. 5 
Direct means of control of these pests in the field is not possible. 
