Animal Health
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Browsing Animal Health by Subject "Aerosols"
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Item Aerial Applications of Insecticides for Tsetse Fly Control in East Africa(1969) Lee, C.WSince 1948, research has progressed in East Africa on the control of tsetse flies by ,leria. applications of insecticides. Initial experiments proved that residual spray treatments were ineffective while repeated applications of coarse aerosols gave promising fly mortalities. In recent years, with the development of more toxic insecticides used in conjunction with improved thermal exhaust equipment and modified rotary atomizers, sprays with fine aerosol characteristics have been produced at considerably reduced cost. Aerial applications of aerosols are confined to early morning and late afternoon when weather conditions are stable, but large areas can be treated during these short intervals, and the technique is efficient and economical. Control of tsetse flies has been good; where complete isolation of an area has been possible, eradication has been achieved.Item New Developments in Tsetse Fly Control Using Aircraft(1977) Lee.C.WThe use of aircraft to apply insecticides for the control of tsetse flies has become of increasing importance particularly during the last decade. Nearly 30 years have passed since aIr-spraying operations to combat tsetse fly first began in Southern Africa, (31,32) when fixed-wing aircraft were used to apply nonpersistent insecticides as aerosols and fine sprays. The stage has now been reached where such techniques are exploited on a large scale (17,26) . During the last eight years, helicopter spraying techniques have developed from field experiments with ground spraying techniques in Nigeria using persistent insecticides, i.e. the discriminative treatment.of flies in continuous thickets, riverine habitats and ot.her foci which tsetse flies are known to frequent. The choice of a particular technique has been determined to a large extent by the nature of the habitat and the topography of the land. It might also be influenced by traditional methods of tsetse control, such as discriminative and selective ground spraying, which, in Nigeria have been developed to a high degree of efficiency. It was therefore logical to adapt some aspects of these ground .spraying techniques when helicopter spraying was introduced for the first time in Nigeria.
