76 INSECTS AFFECTING STORED PRODUCTS. 
practiced. One condition might militate against the effectiveness 
of a st ampin g-out process, which is that there is a possibility that the 
insect might find food in some wild leguminous plant producing a 
seed large enough for its development, for example, one of the vetches, 
or other related wild plant, or some plant that has escaped from culti- 
vation. Although tliis contingency is a doubtful one, still the project 
is one requiring further study with this end in view. Otherwise the 
remedies are practicaUy the same as for the pea weevil, allowing of 
course for different food habits. 
The hot-water remedy. — In regard to direct remedies, the late Dr. 
James Fletcher, experimenting in 1888, demonstrated that soaking 
broad beans in water for 24 hours drowned every specimen of the 
weevils present in the samples which he had for the purpose. This 
expedient, if not applied when the seed is first harvested, should be 
employed before the time of sowing the seed. The hot-water treat- 
ment, with an exposure of, say, 15 minutes, as employed by Mr. Parker 
in his experiments with cold water gradually heated to 140° F., is 
obviously a more certain remedy. 
Writing of the possibility of the breeding of this species in food 
plants other than broad beans, Mr. Parker stated, March 18, 1912, 
that it seems possible that the other leguminous seeds come too late 
for the beetles to oviposit upon the pods. The Windsor beans are 
planted in November and ripen very early, while the other legumes 
are not planted until spring and do not ripen until quite late in the 
season. 
In the practical carrying out of this remedy a piece of burlap is 
placed in a caldron so that when weighted down with the beans it will 
not touch the bottom or sides. This keeps the beans from coming into 
contact with the heating surface and prevents them from becoming 
overheated. The beans are then placed on the burlap and covered 
with water and the fire started. The temperature should be raised 
as rapidly as possible, the beans stirred constantly, and when the 
thermometer reads 140° F. the beans should be immediately removed. 
They may then be planted or spread out in a thin layer to dry. 
Holding over seed. — As in the case of the related pea weevil, holding 
over seed for a second year in a tight bag or other receptacle will be 
found sufficient. The beetles, if kept in a warm room, will emerge 
prematurely and will die without injuring the beans afterward, as 
they are unable to breed in dry seed. 
Fumigation. — Fumigation with bisulphid of carbon, at the rate of 
about 2 or 3 pounds of the chemical to each 1,000 cubic feet of air 
space for 48 hours, is a perfect remedy in an air-tight receptacle, as in 
the case of other bean and pea weevils. 
While a smaller amount of this chemical — 1^ pounds to 1,000 cubic 
feet, with an exposure of 36 hours — is sometimes advised and is theo^- 
