Enhancement of biocontrol of onion white rot using organic sulphides and plant growth promoters [electronic resource].

Includes reference.

Nine isolates of Sclerolium cepivorum obtained from different localities of Upper Egypt were able to infect Giza 6 onion cultivar and produced typical symptoms of white rot. The pathogenic potentialities of the tested isolates ranged from moderate to severe. Trichoderma viride and T. harzianum were capable to antagonize growth of the tested S. cepviroum isolates in vitro. They showed different inhibitory effect against growth of the pathogen isolates on PDA medium ranged from moderate to severe. Under greenhouse conditions treated infested soil with the pathogen isolates No.5 and 7 with both antagonists at transplanting time, significantly reduced percentages of infection and white rot severity on Giza 6 onion cultivar and numbers of the pathogen sclerotia in soil.

Summary in Arabic.

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