Prevalence of olive tree phytopathologies of microbial origin in Fquih Ben Salah, Azilal and Beni Mellal (Morocco)

The herein search has as an objective to determinate the prevalence of olive tree phytopathologies of microbial origin in some olive groves of Fquih Ben Salah, Azilal and Beni Mellal. To reach this, 23 orchards were investigated which permitted us to identify the presence of three diseases of microbial origin. Two of them are of fungal origin, e.g., verticillium wilt and olive scab. While the third phytopathology has a bacterial origin which is olive tuberculosis. Moreover, the geographical distribution of the identified foci varied from one disease to another. In fact, olive scab was the most prevalent in the three studied provinces, followed by verticillium wilt and bacterial olive tuberculosis. On the other hand, psyllid, olive scab and verticillium wilt were the most cited diseases by the farms responsible for olive orchards recruited in our study. Conversely, more than 50% of these farmers affirmed not using a phytosanitary treatment against pests and diseases