Identification in vitro des Bioagresseurs Végétaux pathogènes de quelques Arbres Fruitiers De la région de Ghardaïa-cas de Berraiane et de Daya Ben Dahoua

Abstract

In vitro identification of pathogenic plant pests of fruit trees in some localities of the Ghardaïa region; cases of Daya Ben Dahoua and Barraian. This work is a contribution to the study of pathogenic plant pests of fruit trees in some localities of the Ghardaïa region (Daya Ben Dahoua and Barraian). The main objective of this study is to detect in vitro the different pathogenic bacteria and fungi proliferating fruit trees. The field surveys the macro and microscopic analyses in the laboratory of the samples of fig, vine and pomegranate, showed that the trees of the locality of Daya ben Dahoua, are infected abundantly by the pathogenic fungi, Rhizopus sp and penicillium sp. However, in the Berraian region, the trees are attacked by the three pathogenic fungi, Penicillium Sp, Alternaria Sp, Rhizopus Sp. And a non-pathogenic fungus, the serum mycelium. In terms of bacteria, (Bacillus Gram +) are the main problems of bacteriosis in the fruit trees studied, of which they are abundant in the trees of Daya Ben Dahoua