Circular 21 - Inseoticides and SubaMiary Materials 22 
COTTONSEED OIL 
This oil is used in combination with 
orthodichlorobenzene for killing powder-post 
beetles in infested wood. Treatment consists 
in applying it to the surface or by immersion 
of the wood in vats, depending on the quantity 
of wood requiring treatment and facilities 
available. When combined with pine tar oil it 
is used to kill ticks in the ears of animals. 
Cottonseed oil is a pale yellow, practi- 
cally odorless liquid. It is used in the manu- 
facture of soaps, butter and lard substitutes, 
salad and cooking oils, leather dressings, and 
lubricants. 
Cottonseed oil is sold in tank cars, 
barrels, 5-gallon cans, and small bottles, at a 
price range of 14-1/2 to 14-3A cents per pound. 
Available on contract: see Class 51, 
General Schedule of Supplies, Procurement 
Division, Treasury Department. 
CREOSOTE OIL 
Impregnation of wood with coal-tar creo- 
sote oil by standard pressure processes renders 
it resistant to attack by termites and other 
wood-boring insects such as Lyctus powder-post 
beetles. Creosote oil is also used effectively, 
as a spray, in controlling fleas and ticks in 
basements, dog-kennels, warehouses, outbuild- 
ings, or other places in which staining is not 
objectionable. It is used to spray dead animal 
carcasses, to rot holes in trees to kill sand- 
flies, and in combination with fuel oil may be 
sprayed into windrows of bay grasses for the 
