- 4 
Completely encircle the infestation with the material, covering an 
area extending about 2 or 3 inches outside the infestation. The infested 
area need not be sheared. 
Requirements for Products Labeled "EQ 335 Screw-Worm Remedy" 
The term M EQ 335 screw-worm remedy" has been recorded in the 
Trade Mark Division of the U.S. Patent Office to protect its use for a 
specific insecticidal composition useful for wound treatment of livestock 
to control screw-worms and fleeceworms. Products designated by this 
recorded term should have the composition given on page 1. General 
approval is given for its use for products that comply with the prescribed 
composition and are marketed in compliance with Federal and State 
regulations relating to insecticides. 
The stability and shelf life of the composition have been appraised 
only when it was in glass containers. Until adequate tests demonstrate 
that other types of containers can be used without affecting the continued 
effectiveness of the composition, products labeled "EQ 335 screw-worm 
remedy" should be packaged and marketed in glass containers only. 
OTHER SMEARS CONTAINING LINDANE AND PINE OIL 
Laboratory and field tests have been made with numerous variations 
of EQ 335, and it appears that other formulas containing 3 percent of 
lindane and 35 percent of pine oil with a bland diluent and proper thickening 
agents perform about as well. However, field experiments with these 
other formulas were not so thorough as those required to establish the 
merit of EQ 335. Therefore, although they can be registered as screw- 
worm treatments for sale in interstate commerce, they should not be 
designated as EQ 335 if the other ingredients differ from those outlined 
on page 1 . 
Two formulas that cannot be labeled as EQ 335 but appear to be 
satisfactory screw-worm treatments are given below (figures in percent 
by weight). 
Formula 
A 
F« 
Drmula B 
Lindane 3 
3 
Pine oil 35 
35 
M moral oi 1 23 
20 
Emulsifier (same as for RQ 335) LO 
rogel -4 
Colloidal kaolin 
iMim— ' -~ 3 
h.) -- 3 
■ i - h.) - - ,; 
-- 
R, 'I . 
