16 



Since the larvse of the twelve-spotted asparagus beetle 

 develop within the berries, the application of insecticides is of 

 little benefit. 



Attacking Beans and Peas. 



1. Cutworms (see page 9). 



2. Wireworms attacking seed (see page 10). 



3. Seed corn maggot attacking seed (see corn insects, page 

 20). 



4. Blister beetles (see page 12). 



5. Rose chafer (see page 14), 



6. Common bean weevil, Acanthoscelides ohtedus Say. 



The common bean weevil, as well as other closely related 

 species, annually infests quantities of dried beans, rendering 

 them unfit for food or seed. A large proportion of these beans 

 become infested in the field, the eggs being laid upon or in- 

 serted in the bean pods by the female w^eevils. When the 

 beans are harvested the presence of infested seed is rarely 

 noticed, but after they are stored the small, white, footless 

 grubs feeding within the seed reach maturity and transform 

 to small brownish gray weevils. As the common bean weevil 

 is capable of developing in dry seed, eggs are soon deposited 

 on the stored beans and thus infestation continues. 



Control. — Since it is extremely difficult to determine whether 

 or not beans are infested when harvested, it is advisable to treat 

 all seed before storing, and thus avoid severe loss. The best 

 means of preventing weevil injury is to fumigate all beans with 

 carbon disulphid before storing them. Carbon disulphid is a 

 colorless liquid which quickly evaporates when exposed to the 

 air. It can be purchased at any drug store and costs very 

 little. 



Put the beans to be fumigated In a tight bucket, barrel, bin 

 or room, according to the quantity to be treated. Compute 

 the cubical contents of this container and use the carbon disul- 

 phid at the rate of 2 teaspoonfuls per cubic foot of space or 

 4 pounds to every 1,000 cubic feet of space. Place the re- 

 quired amount of carbon disulphid in a shallow dish on top 

 of the beans, and immediately cover the container to make it 

 as nearly gas-tight as possible. Experience has shown that 



