Circular 23 - Reference Index 
19 
Devices for insect 
control (Cont f d) 
reference to litera- 
ture 20-56. 
respirators . . . 20-48 . 
requirements. . .20-3. 
special eye gnat 
traps 20-43. 
spraying accessories 
20-23. 
hose 20-24. 
nozzles 20-26. 
rod extension 
20-29. 
shut-off. .. .20-29. 
spraying equipment 
20-5. 
tarpaulins (rubber- 
ized) 20-49. 
types 20-2. 
vaporizers 20-9. 
wire cloth (screen- 
ing) 20-46. 
Diatomaceous earth 
characteristics 
.............. fcJL— fc ( • 
manufacturers and 
distributors 21-27. 
price 21-27. 
uses 
industrial.. 21-27. 
insecticidal 
7-20; 21-26. 
Di ethylene glycol mono- 
butyl ether acetate 
use 7-22. 
Di ethylene glycol mono- 
ethyl ether 
use 7-22. 
Dinitroanisole 
use 15-21. 
Diphenylamlne 
characteristics ; 
price; caution to 
prevent discolora- 
tion 21-27. 
manufacturers and 
distributors 
18-12; 21-27. 
use (screwworm control) 
18-10,12; 21-27. 
Disk spray nozzles 
description. . . .20-26. 
uses. ......... 1 jcu~fc / • 
Dog flea ( Ctenocepha - 
lides oanis * (Curt. )) 
in U. S 13-3. 
Dog flies (see Stable 
flies) 
Dorylus spp. (see Driver 
ants) 
Drainage 
campsites 7-13; 8-25. 
horse and deer fly 
control ........ 8-25 . 
marshes 7-13 • 
mosquito control 
7-13,14. 
road construction 
7-12. 
sand fly control 
8-29. 
termite control 
2-11; 2A-4. 
Driver ants ( Dorylus 
spp. ) 
habits 15-3. 
Dry heat (to control) 
food insects 4-4. 
