Parasitic plants such as Striga hermonthica and Striga gesnerioides represent a real plague of parasitism on cultivated host plants. The main objective of this study is to assess the knowledge levels of growers on Striga hermonthica and Striga gesnerioides. A participatory approach was used, including the Communal Directors of Agriculture of five (5) communes, as well as producers in each target village. This study shows that 95% of producers confirm the presence of Striga hermonthica in millet fields and 89% of producers also mention the presence of Striga gesnerioides in cowpea fields. Among the wild host plants, eleven (11) are identified for Striga hermonthica and four (4) for Striga gesnerioides. According to producers, the symptoms of the attack of these parasitic plants that reduce millet and cowpea yields remain yellowing, stunting, reduced tillering / branching, poor development of ears/pods and the presence of millet stem borers. However, producers use control techniques such as hand-pulling, use of manure and use of host plant association techniques with sesame. These results can contribute to the development of effective control methods against Striga hermonthica and Striga gesnerioides.