4 LEAFLET 152, U. 8S. DEPARTMENT OF AGRICULTURE 
remain attached for weeks without changing position. The edges of © 
the ears of dogs and cats are often covered with them. 
These fleas can be controlled by keeping the roosting and nesting 
places of poultry clean and by spraying the dropping boards, nests, 
and floor of the chicken house with creosote oil. Fowls should be kept 
from beneath buildings, or such places should be sprayed with creosote 
oul every 2 or 3 weeks. If this is done, treatment of the fowls is not 
necessary. Derris powder or carbolated vaseline will kill the fleas. 
When derris is applied to dogs and cats to control this flea, 1t must be 
brought in contact with the imsects, as the sticktights do not move 
around and come in contact with the powder. 
Where Insecticides May be Obtained 
Derris powder, or proprietary powders containing derris extract, 
and pyrethrum powder are now available in many drug, seed, pet- 
animal, and other stores. Naphthalene flakes are handled by. drug 
stores. Creosote oil is sold by many dealers in paint, hardware, and 
lumber. 
For the convenience of those who are unable to obtain derris powder 
locally there is given below a list of some of the wholesalers and manu- 
facturers of derris. No claim is made that the list is complete, nor is 
any guarantee here expressed or implied for the products of the com- 
panies listed. 
Chipman Chemical Co., Bound Brook, N. J. 
Wm. Cooper & Nephews, Inc., 1909-25 Clifton Avenue, Chicago, II. 
W. J. Dennis, 1540 Tenth Street, Des Moines, Iowa. 
Derris, Inc., 79 Wall Street, New York, N. Y. 
L. W. Dumont & Co., 50 East Forty- second Street, New York Ney. 
Hammond Paint and Chemical Co., Inc., Beacon, 
McCormick & Co., Baltimore, Md. 
S. B. Penick & Co., 115 Fulton Street, New York, N. Y. 
R. J. Prentiss & Co., Ine., 100 Gold Street, New York, N. Y. 
Sherwin-Williams Co., Chicago, Il. 
Stanco, Inc., 2 Park Avenue, New York, N. Y. 
Cyrus Ward & Co., Ltd., 305 East Forty-seventh Street, New York, N. Y. 
The market price of derris varies with the available supply and the 
amount purchased, but it usually sells at wholesale for about 20 to 50 
cents a pound for powder containing from 4 to 5 percent of rotenone. 
U.S. GOVERNMENT PRINTING OFFICE: 1937 
For sale by the Superintendent of Documents, Washington. D. C. - - - - - Price 5 cents 
