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Weevils in Beans and Peas. 29° 
HYDROCYANIC-ACID GAS. 
Fumigation with hydrocyanic-acid gas is recommended when large 
quantities of beans, peas, cowpeas, or chick-peas are found infested 
Fic. 26.—Carload lots of 240-pound sacks of chick-peas as stacked in badly infested 
warehouse. Samples taken throughout length of sack proved that hydrocyanic-acid 
gas penetrated to the very center and that infestations were killed. 
Wie. 27.—Interior view of warehouse containing thirty thousand 240-pound sacks of 
chick-peas with a retail value of $864,000 at time of treatment. Infestations breaking 
out under such abnormal storage conditions were controlled by fumigation with hydro- 
eyanic-acid gas. 
with weevils. The seeds must be in sacks and so stacked that the gas 
can reach several sides or portions of the sacks. Chick-peas stored in 
