In Guinea-Bissau, the intensification of cashew monoculture and the decline in yields of rice and other staple cereals is a common issue that puts the population in an unprecedented state of food insecurity. Organisations such as CAURAL REMOBE have tried to find a solution to this problem. The experience developed by this association and its commitment to producers has encouraged a change in producers’ behaviour by embracing peasant varieties that are better adapted to the agro-ecological context. The diversification of agricultural production, based on the choice of local species and varieties and accompanied by the promotion of management in cereal banks in 35 villages in the administrative sector of Contuboel, has been a great success. The association has succeeded in meeting the challenge of producing and introducing quality seeds in 35 villages, improving productivity and providing agricultural advice (agronomic monitoring, exchange of experiences, training).