Portable Applicators

c-1 Hand-operated sprayers and dusters have come a long way since the days when farmers applied insecticides with cheesecloth bags. Today, there are suitable applicators available for every control situation; around the home and garden, in stores, restaurants, and hospitals.
Rotary hand dusters are efficient applicators for applying dusts. They are useful to the home gardener, but are no longer a commonplace sight on the farm or cotton plantation where tractor or airplane-mounted equipment have replaced them. c-2
c-3 The compressed-air sprayer is a handy applicator for treating small insect-infested areas-in the fields and gardens and is especially useful in livestock pest control.
Since aerosol dispensers (frequently called "bombs") became available for civilian use at the end of World War II, they have had widespread use. A chemist-entomologist team first developed aerosols in 1941. They found that spraying a solution of liquefied gas and insecticide through a small hole created a slow-to-settle insecticide fog that was fatal to mosquitoes and flies. Aerosols were used during the war against insect disease carriers and pests in barracks, mess halls, tents, and foxholes. In recent years, inexpensive low-pressure containers have been developed; early model dispensers have become obsolete. Above: Dr. R. A. Fulton, United States Department of Agriculture, compares a new low-pressure container with the first aerosol civilian model (upright) and the original experimental aerosol bomb. c-4


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