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One fumigant spiral burnt per floor of a house kills all, evinced by dead cockroaches. Fumigants are sold by Johnson, Bayer, Shell, Rousell and others. Open drawers, closets and so on, and close the house and stay out of it for 2 hours upon lighting the spiral or canister. Air out the house for a half hour before reoccupying it.

Fumigation with 5 % b -cypermethrine (Bolate) for 2 hours kills all adult and larval mosquitoes. It can be applied at 20 houses per worker per day.

Bayer’s Brazilian Internet homepage

is a good starting point for fumigants like esbiotrina and others.