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* 
= 
Use a cylindrical compressed-air sprayer or 
a knapsack sprayer for treating small areas. 
Power sprayers are desirable for treating large 
areas. 
DUSTING 
Dusting may be easier than spraying if you 
have to treat a large area. 
Apply a 5-percent toxaphene or chlordane 
dust at the rate of 40 pounds per acre (or 1 
pound per 1,000 square feet), or a 1-percent 
lindane dust at the rate of 25 pounds per acre 
(or 0.6 pound per 1,000 square feet). The 
treatment gives control for about the same 
period as sprays. 
Use a rotary hand duster or a power duster, 
depending on the size of the area to be treated. 
PREPARING A SPRAY FOR CHIGGER CONTROL 
Amount of purchased 
product to mix with 
Insecticides, and forms water 
in which they may be 
urchased = 
p For treat- oe aan 
ing 1 acre ie 
square feet 
Toxaphene and chlordane 
Emulsifiable concentrate: 
AQ-percentss eee 2% quarts 2 ounces 
bO-percentes essssees 2 quarts 1% ounces 
Gb=percents=-es= senna 1% quarts 1 ounce 
Wettable powder: 
25-percente sss aan 8 pounds 3 ounces 
A? =DerCent ee eee 5 pounds 2 ounces 
Lindane 
Emulsifiable concentrate: 
20) =DCLCen tae eens 14% pints 0.6 ounce 
25=PerCcen tas eens 1 pint 0.5 ounce 
Wettable powder: 
25=Percenta sss see eee 1 pound 0.5 ounce 
PRECAUTIONS 
Handle insecticides with care. Most of them 
are poisonous to people and to animals if used 
carelessly. . . . Wash off any insecticide that is 
spilled on the skin. . . . Don’t spray or dust 
near feed and water troughs. . . . Don’t use 
insecticides in strengths greater than those 
recommended. 
NoTr.—Negative numbers of the four photographs on 
the inside pages are, left to right: 13788A, 13789A, 
138784A, and 18785A. 
Prepared by the Entomology Research Branch, 
Agricultural Research Service 
Washington, D. C. Issued April 1955 
U. S. GOVERNMENT PRINTING OFFICE : 1955—O-324981 
For sale by the Superintendent of Documents, U. S. Government 
Printing Office, Washington 25, D. C. — Price 5 cents 
