The Royal S.A. Company located in Groes-Mome (Martinique) produces and sells tropical fruit juices and jellies. Guava extract represents more or less 40% of the total volume produced. The company regrouped the guava grower's association in 1991 in order to secure self-sufficiency and quality of pulp. Fifty-one ha of guava were planted between 1991 and 1996. These should come into full production in die 1996 to 1997 season. The factory will be able to process 1000 t of fruit per year, enough to become self-sufficiency in pulp production. The work presented here shows the legal and technical aspects within the relationship of the producers and the Royal S.A. Company,