Files

Abstract

The paper reviews the history of chemical control of H. hampei around the world, including results of field trials and laboratory bioassays of various insecticides against the pest. Brazil pioneered the use of modern organic insecticides against H. hampei in 1947 with the aerial and mechanical application of BHC dust. The technique was soon adapted by Africa where BHC dust was replaced by wettable powder. Since the late 1960s, endosulfan has completely replaced BHC. Field trials with 73 formulations of 54 different insecticides including 10 organochlorines (OC), 26 organophosphorous compounds (OP), 9 carbamates, 4 synthetic pyrethroids (SP) and 3 mixtures have revealed that only OCs provide good control of the pest. Laboratory screening of 39 formulations of 25 insecticides demonstrated high susceptibility of the pest to several OCs, OPs and SPs. The need for developing more presistant formulations of some OPs and SPs, and for integrating chemical spraying with other methods of pest control are emphasized

Details

PDF

Statistics

from
to
Export
Download Full History