These insecticides kill the cock- 

 roaches present, and all except 

 those applied by aerosol leave a 

 residue on the treated surface. 

 The residue does not keep cock- 

 roaches out, but those that come 

 in contact with it are killed. A 

 single treatment in the right places 

 gives protection for several weeks. 



A liquid insecticide is often the 

 best for use in the home. A dust 

 or water-base spray may be used 

 when there is danger of fire from 

 oil-base liquids. Both a liquid and 

 a dust may be used when cock- 

 roaches are abundant, difficult to 

 control, or firmly established. 



For restricted use 



Dipterex 1 is effective in con- 

 trolling roaches, but its uses are 

 restricted. Dipterex should be 

 used only by pest-control opera- 

 tors. It should be applied in a 

 1 -percent water spray. 



Application 



Spray 



Apply a liquid insecticide with 

 an ordinary household plunger- 

 type sprayer that produces a coarse 

 spray. 



If large areas are to be treated, 

 compressed-air sprayers, power 

 sprayers, or other special equip- 

 ment may be used. The sprayer 

 should deliver a fairly coarse mist 

 that will wet the surface being 

 treated. If the mist is too fine, it 



'Trade names are used in this publi- 

 cation solely for the purpose of providing 

 specific information. Mention of a trade 

 name does not constitute a guaranty or 

 warranty of the product named and does 

 not signify that this product is approved 

 to the exclusion of other comparable 

 products. 



SN-2289 



Oriental cockroach: Above, female; below, 

 male. ( 1 l A times natural size.) 



will float away in the air. Apply 

 enough spray to moisten surfaces 

 thoroughly, but not so much that 

 the liquid begins to drip or run. 



A paintbrush may be used for 

 applying the liquids in cracks or 

 along baseboards. 



Dust 



Apply a dust insecticide with a 

 puff duster of the bulb, plunger, or 

 bellows type. Blow the dust into 

 hiding places that are hard to 



