ABSTRACT
Chemical methods have been used extensively to control tsetse flies in the Malawi, Mozambique, Zambia and Zimbabwe region for many years, especially ground spraying and to a lesser extent in the last two mentioned countries, aerial spraying. Considerable successes have been achieved despite the reinvasion problem. More recently interest has centred on aerial spraying carried out at night when reinvasion conditions are optimal using endosulfan at low dosages. Results have been so encouraging that serious consideration is being given now to progressive operations using this technique in conjunction with odour baited and insecticide treated targets to eradicate tsetse flies from the entire area of the common fly-belt. The extent of this area is approximately 322 000km2. The purpose of the targets would be to limit reinvasion and provide support in the more difficult terrain. The feasibility of such an ambitious undertaking is currently being investigated under the European Development Fund financed Regional Tsetse and Trypanosomiasis Control Programme of Malawi, Mozambique, Zambia and Zimbabwe.
