INSECTS INJURIOUS TO GARDEN TRUCK 479 



of the northern states are comparatively free from the pest, 

 and so furnish most of the seed that is used. The adults, which 

 are small, grayish, snouted beetles, appear on the vines while the 

 peas are in blossom, and lay their eggs on the young pods. 

 The larvae enter and feed on the peas, finally pupating in them. 

 In the northern regions they remain in the seed until it is 

 planted the following spring. In other places they leave the 

 peas in the fall. 



As there is only one generation a year, and as this species 

 does not breed in dry peas, it is often worth while to hold the 

 seed in bins or sacks until all of the adults have issued. Or the 



FIG. 227. Pea-weevils, Bruchus pisorum, and infested peas. 



twice natural size.) 



(About 



seed may be treated by heating or scalding or fumigating with 

 carbon bisulphide. 



The Bean -weevil (Bruclius obtectus). This is the most 

 common of three or four species of bean-weevils that occur in 

 some parts of the United States. The adults are only about 

 one-eighth of an inch long, dark-colored and short-snouted. 

 Several larvae or bettles may be found in one bean, and they 

 continue to breed in the stored product throughout the year. 

 All infested beans should be fumigated with carbon bisulphide 

 as soon as possible. If the seed is thrown lightly into water 

 most of the infested beans will float. By destroying these one 

 can avoid planting infested seed. 



