To evaluate the effectiveness of bendiocarb (Ficam W) for the control of Anopheles stephensi Liston the main malaria vector in the south of Iran, a preliminary experiment based on experimental hut trials was carried out in the village of Khesht, Kazeroun, southern Iran in 1977. One round of spraying was implemented at dosage rates of 200 mg/m2 and 400 mg/m2 of a. i. in newly built huts, beginning of July 1977. The technical difficulties encountered in southern Iran were the resistance of An. stephensi to DDT and dieldrin, the exophilic and exophagic habits of An. dthali, An. superpictus and An. fluviatilis, and the ecology of the inhabitants.