الخلاصة:
This thesis studies citrus diseases in the Ghardaïa region, with the main objective of carrying out a synthesis of the works in order to obtain an in-depth knowledge of the local phytosanitary situation, which is crucial information for making informed decisions in terms of disease prevention, management and control. The research results revealed the presence of a few diseases, including gummosis and Alternaria, as well as other pathogenic fungi. An important conclusion is that the climate of the southern region is not favorable for the development of citrus diseases; the arid climatic conditions of the south are not conducive to a high incidence of fungal diseases on citrus.
