I was invited to deliver lectures within my specialization by various local and international institutions and organizations. These were as follows:-

       1. Biological control of water hyacinth in the Sudan. Delivered at the Queens University of Belfast, Depart Agriculture, Agricultural Zoology Research Division,February 1985.

       2. The problem of crop pests in the Sudan. Delivered at the Queens University of   Belfast, Department of Agriculture, Agricultural Zoology Research Division,   February 1985.

       3. Evaluation of the biological control project on water hyacinth. Ministry of   Agriculture animal Wealth and Natural Resources, Plant protection Department,      Khartoum North, February 1986.

       4. Management of water hyacinth, a classical case of biological control from the  Susan. delivered at the University of California, Berkeley, April 1987._

       5. Biological control, prospects against locusts and grasshoppers. Arab Organization   for Agricultural Development, Khartoum, Sudan, August 1989. AOAD.

       6. Biological control, ecological basis and implementation with special reference to  locusts and grasshoppers. ICIPE, Nairobi, Kenya, July 1990.

       7. Biological control in the Sudan. IITA, Cotonu, Benin, May 1991.

       8. Natural enemies of Striga and prospects of its biological control. IITA, Cotonu,  Benin, May 1991.

       9. Biological control of water hyacinth, a successful attempt in the Sudan. NCR,   Khartoum, Sudan April 1992.