Cotton pest control in Sub-Saharan Africa is mainly directed against bollworms. The increased use of synthetic pyrethroids in control programs in the field leads to a drastic reduction in the economic incidence of these insects. Nevertheless the limited range of activity of this group of pesticides cleared forward some secondary weighted pests, namely leafworms, sucking insects and mites, the economical incidence of which is far from negligible. The addition of an organophosphate induced substantial improvement of the protection obtained as well as an important reduction in the dosis of pyrethroids.