The Spotted stem borer Chilo sacchariphagus is a major pest for the sugarcane farmers in Reunion Island and Mauritius. Heavy infestations can cause important losses is cane yield and sugar recovery. In these traditional sugar countries, entomological programmes are focused on biological control for many years because of relative inefficiency of chemical control and because of environmental considerations. Use of natural or introduced parasitoids against graminaceous stem borers is a widespread practice, with varying results. In Reunion Island, common natural species on C. sacchariphagus are egg parasitoid Trichogramma chilonis, larval parasitoids Cotesia flavipes and pupal parasitoid Tretrastichus howardii. Release of introduced tachinids flies from Asia in the seventies have failed. Paradoxically, little or none studies were carried out on indigenous species and inondative experimental releases have never been tested. Possibilities of using a natural parasitoid complex as a suitable biological control in sugarcane farms are discussed in this paper.