| Popis: |
The results of discriminative spraying of endosulfan and decamethrin from a Bell 47G-4A helicopter to fringing riverine forest habitats of Glossina tachinoides in the Komoe Valley, Upper Volta, are described. The insecticides, diluted with diesel oil were applied from the helicopter through a unilateral (left-side) arrangement of four rotary atomisers. Three experimental blocks were each sprayed twice at an interval of about one month, one with endosulfan at individual swath dosages of 100 g (a.i.)/ha, the second with endosulfan at 200 g (a.i.)/ha and the third with decamethrin at 12.5 g (a.i.)/ha. In spite of aerially applied dieldrin barriers there was extensive reinvasion by G. tachinoides during the inter-spray period, consequently conclusions were largely drawn from the data collected before and after the second cycle of insecticide applications. The reinvasion problem is discussed. Endosulfan at 200 g/ha was the most effective in controlling G. tachinoides. Other treatments were less, but p... |
