The Experimental Application of Insecticides from a Helicopter for the Control of Riverine Populations ofGlossina tachinoidesin West Africa. III. Operational Aspects and Application Techniques

Abstract

Abstract Descriptions are given of various operational aspects of the dispersal of insecticides, as aerosols and sprays, from equipment fitted to a Bell 47G-4A helicopter, into the riverine forest habitats of Glossina tachinoides Westw. The two aerosol techniques: ‘bilateral’ and ‘unilateral’ and a ‘unilateral’ spray technique, made use of the helicopter main rotor downwash to obtain penetration of insecticide droplets into parts of the G. tachinoides habitats considered important as resting sites. The bilateral technique which involved the helicopter flying above the forest canopy approximately 25 m from the water's edge was easier and safer to execute than the unilateral technique, which involved the helicopter flying over the inner edge of the riverine forest. In future a combination of both types of technique, with some equipment modifications to allow change over from one technique to the other in flight might be more appropriate than using one or the other of the techniques. It was concluded that bo...