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MBr^f, U. S. B^^^t §f Agriculiure, 



United States Department of the Interior 

 Pish and Wildlife Service 



Wi Idli fe Leaflet 190 



,.y, S. D£[- 



Washington, D, C, 



May 1941 



_1/ 



DIREGTIOUS FOR DBSTHQYING CRA-WnSEES 



Prepared in the Division of Predator and Rodent Control 



MJi^il GATING BUPJIOWS V/ITH CARBON DISULFIDE 



A practicable method of destroying crawfishes is to fumigate the 

 "burrows with carton disulfide, 



1. Drop 10 drops of caroon disulfide into the "burrow. 



2. Close the entrance to the "burrow* 



Care should "be taken to drop the fumigant well into the open 

 hole to prevent loose sand or dirt covering it when the entrance is closed. 



The "burrows may "be closed successfully oy a sharp pressure of the heel, 

 although in hard ground it may 'De necessary to use small pieces of sod, 



A medicine dropper or glass syringe is well adapted for applying 

 the car"bon disulfide; a small-necked, shallow "bottle or can is useful 

 for carrying a supply of the liquid. Using an engineer's pump oiler or 

 long-nozzled oil can, with nozzle flattened to allow the liquid to drop 

 slowly, is a convenient and faster method of application "but is some- 

 what wasteful of the chemical. 



Ten dxops is sufficient for one "burrow. Conserve the car"bon disul- 

 fide "by careful measuring. One gallon will treat nearly 5,000 burrows, 



CAUTIOH: Car"bon disulfide is highly inflammable and explosive. Do not 

 smoke when using it or bring it near an open flame, 



' TP-EATIITG BURROWS WITH COAL-TAR AHD CREOSOTE DIP ■ 



Treating each burrow with a commercial emulsified cattle dip made 

 of coal tar end creosote has also proved practicp'bJ.e in destroying craw- 

 fishes. This product is safer to use than carbon disulfide and is less 

 expensive. 



^' ^ F. S. 



l/ This leaflet supersedes Leaflet Bi-770, isaaed in June 1924 by the 

 l.au of Biological Survey, under the Department of Agriculture, 



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