insect activity will resume in early March, or as soon as warm spring 
weather arrives. Because the surface layers warm up the soonest, moth 
activity will begin first. The insect populations increase rapidly dur- 
ing the spring and sunmer, as most of these species complete a generation 
in one to two months in warm weather, 
Preventive Program 
Insect infestation can be delayed and held to a noninjurious level for 
a considerable period by a good preventive program. The more thorough the 
program, the longer the necessity for fumigation can be delayed. The pro- 
gram recommended here is divided into three parts, (1) cleanup of warehouse 
and environs, (2) application of residual sprays to the warehouse before 
filling, and (3) periodical application of aerosols. 
Cleanup of warehouse and environs 
Before storing peanuts, thoroughly clean the warehouse. Sweep down 
walls, rafters, beams, and other parts of the building where old peanuts, 
grain, or dust can lodge. Clean out elevators, conveyors, elevator or 
conveyor wells, and any other spots where old peanuts and refuse have ac- 
cumulated. Clean up spillage and trash near the warehouse. Burn, bury, 
or remove from the premises all refuse collected in these operations. 
Application of residual sprays 
Apply a residual DDT spray to the interior of the empty warehouse, 
covering floors, walls, beams, and ceiling; to the outside of the build- 
ing on the walls up to a height of 6 or 8 feet, and to the ground to a 
distance of 6 feet from the building. Use a 2.5 percent DDT spray, ap- 
plied at the rate of 2 gallons per 1,000 square feet (about to the point 
of runoff). If a 25 percent ermlsifiable concentrate is used, add 1 quart 
to 24 gallons of water. If a 50 percent wettable powder is used, add 
1 pound to 24 gallons of water. The emulsion need not be agitated, but 
the wettable powder should be constantly agitated while being applied. 
Periodical application of aerosols 
Aerosol applications should be started as soon as the peanuts are 
placed in warehouse. Apply weekly for the tirst 2 applications, then 
every 2 weeks until the middle of November. Resume applications in 
early March and apply at 2-week intervals through the summer or until 
the peanuts are removed from storage. 
