Resistant Roaches 
Roaches develop resistance to 
chlordane and lindane; resistance 
is especially widespread in German 
cockroaches. 
Diazinon, ronnel, and malathion 
will control resistant roaches. Apply 
diazinon in spot treatments only 
over the infested places as a 0.5-per- 
cent emulsion or oil solution spray. 
Malathion may be used at 2- to 3- 
percent strength in similar formula- 
tions. Ronnel may be used at 
2-percent strength. 
PLACES TO TREAT 
For best results, apply insecticides 
to places where cockroaches hide. 
To find the hiding places, enter 
a dark room quietly, turn on the 
lights, and watch where the cock- 
roaches run. 
They may hide— 
Around the kitchen sink and 
drainboard. 
In cracks around or underneath 
cupboards and cabinets, or in- 
side them—especially in upper 
corners. 
Around pipes or conduits, where 
they pass along the wall or go 
through it. 
Inside the motor compartment 
of mechanical refrigerators. 
Behind window or door frames. 
Behind loose baseboards or mold- 
ing strips. 
On undersides of tables and 
chairs. 
In radio and television cabinets. 
Behind mirrors. 
On closet and bookcase shelves. 
When treating cupboards and 
pantries, take everything from 
shelves and remove drawers so that 
food and utensils will not become 
contaminated. 
Spray or dust the interiors. Al- 
low the spray to dry, or clean up ex- 
cess powder. Clean shelf surfaces, 
or cover them with paper, before 
replacing the articles. 
If drawers are cleaned thor- 
oughly, it is not necessary to spray 
inside them; it will help to spray 
the sides, backs, and undersurfaces. 
OTHER METHODS OF 
CONTROL 
Bait containing either Kepone or 
Baygon may be used in cockroach 
control. Purchase such a bait and 
place it in areas frequented by cock- 
roaches. Do not use it in places 
where it can be reached by children 
or pets. 
BN—2291 
Brown-banded cockroach: Above, female; 
below, male. (1144 times natural size.) 
