Insecticides can poison insects in many ways. Insecticides r...:an interfere with metabolic processes , of energy production, cuticular growth and hormone production. Many i nsecticides, being potent onerve P>isons, can stop nervous transmission through the insect nervous system. Resistance is now apparent to most. , if not all, types of insecticides and research on the mechanisms of resistance has always been part of the mult disciplinary approach which should be adopted for All cases of insecticide resistance management.. To deal with pyrethroid resistant H. armigera it is necessary to know exactly why the insects are resistant.