Occurrence of strawberry crown and root rots under plastic-house conditions [electronic resource].

Includes references.

Fusarium solani (Mart.) Sacc. and Rhizoctonia solani Kuhn are considered the most serious pathogenic soil borne fungi causing strawberry crown and root rot diseases distributed in several cultivated districts in El-Sharkia Governorate. The investigated cultivar "Festival" showed the highest significant disease infection at Abo-Hammad with the highest disease severity, however, "Sweet Charlie" cultivar recorded less infection. The infected strawberry plants showed black discoloration where the infected roots seemed to be black and small in size. The entire root and the core often darken, unhealthy and lack new growth. In addition, foliage is reduced in size, has poor colour and wilted. Both isolated pathogenic fungi at the investigated districts are frequently differed in their ability to cause the disease. Rhizoctonia solani recorded the least survived plants under plastic-house conditions and proved to be the most virulent fungal pathogen. The sandy soil under investigation was superior in decreasing infection percentage for both strawberry cultivars comparing with the other soil types (clay and sandy clay soil).

Summary in Arabic.

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