DDT residual spray operations
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DDT residual spray operations

  • Published Date:

    February 1947

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DDT residual spray operations
  • Description:
    This manual describes the operations of the Extended Malaria Control Program which utilizes residual DDT spraying of homes as a method of malaria control. The Extended Program, initiated by the Office of Malaria Control in War Areas, is now being administered by its successor, the Communicable Disease Center of the U.S. Public Health Service. DDT insecticide used as a residual spray in houses is a new weapon of attack against an old enemy -- MALARIA. When solutions or emulsions of DDT are sprayed on walls and ceilings, an almost invisible residual deposit of DDT crystals is left on the surface. Malaria mosquitoes and other insects which come in contact with these crystals are poisoned. They die later if they have received a sufficient exposure. This method of killing insects is especially valuable in malaria control activities because mosquitoes inside houses are the ones which are most likely to bite malaria sufferers and thus become infected . These infected mosquitoes have ample opportunity to rest on treated surfaces in houses sprayed with DDT and be killed before they can spread the disease to uninfected persons. This is the basic principle of malaria control through residual spraying. DDT residual spraying is a new insecticidal technique. Before it could be put to extensive use in malaria control programs, it has been necessary to develop new formulas, make changes in spraying equipment, and devise new methods of spraying. This handbook supplies detailed information about formulas used for concentrates and spray mixtures, latest spraying methods, care and use of equipment, and safe practices in handling DDT in U.S.P.H.S. malaria control operations. Suggestions for dealing with the public are also given. The handbook is intended for use by project supervisors and as an aid in training spraying crews. Men in the field who use this handbook are encouraged to send in suggestions and criticisms. These will be helpful in compiling future editions. DDT residual spray program -- Why we use DDT spray -- DDT emulsion concentrate: Formulas for DDT concentrate, Hand mixing DDT concentrate, Power mixing DDT concentrate -- Preparation of houses -- Applying the spray: Hand spraying, Power spraying -- Safe practices -- Suggestions for dealing with the public -- Control of other insect pests with DDT -- Table of equivalent weights and measures. Federal Security Agency, U. S. Public Health Service, Communicable Disease Center, Atlanta. Georgia. 68 numbered pages
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