My career as a scientist in the field of Biotechnology and Plant Pathology favored the cooperation with other countries, especially with those growing citrus, both in Latin-America (Mexico, Costa Rica, Honduras, Colombia, Peru, Brazil, Chile and Argentina), North Africa (Egypt, Tunisia and Morocco), Asia (India, Nepal, Vietnam and Bhutan) and the French Polynesia. Together with scientists of INRA and CIRAD, I participated in missions addressing the control of the “maladie des feuilles cassantes” of date palms, and the phloem necrosis disease of Hevea.