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Performance of algal filtrates and biocides for the control of Sclerotinia sclerotiorum causing damping-off of fennel [electronic resource].

By:

Soliman, N. K

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Language: English Summary language: Arabic Description: P. 45-57Other title:

فعالية رواشح مزارع الطحالب والمبيدات الحيوية فى مقاومة الفطر سكليروتينيا سكليروشيوم المسبب لموت بادرات الشمر.‪ [Added title page title]

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Egyptian journal of phytopathology, 2009 v. 37 (2) [electronic resource].

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In: Egyptian Journal of Phytopathology 2009.v.37(2)Summary: Fennel, Foeniculum vulgare Mill, is one of the umbelliferous medicinal plants and is subjected to infection by Sclerotinia sclerotiorum (Lib.) de Bary, causing economic losses in plant stand and yield ill Egypt. Biological control of S. sclerotiorum using algal filtrates of Nostoc spp., Oseillatoria spp., Spirulina platensis, Chiorella spp., Anabaena oryzae, Wollea spp., Anabaenaflos-aquae and N. humifusum as well as the commercial biocides namely; RhizoN, Plant guard, Bio-ARC and Bio-Zeid were evaluated under laboratory and greenhouse conditions. AU the tested algal filtrates, except those of Anabaena oryzae and Wollea spp., have significantly reduced the mycelial growth of S. sclerotiorum. However, filtrates of Nostoc spp., Oseillatoria spp. and S. platensis completely inhibited the radial growth of the fungus and significantly decreased dampingoff percentages and increased length of shoot-and root systems, plant fresh weight and number of branch es/plant. All the used biocides have significantly reduced the radial growth of S. scleratlorum. Rhizo-N gave the highest inhibition followed by Plant guard. The least inhibition of S. scleratiarum growth was recorded by Bio-ARC and Bio-Zeid. Rhizo-N decreased damping-off percentages and increased the length of shoot and root systems, plant fresh weight and number of branches/plant.

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Fennel, Foeniculum vulgare Mill, is one of the umbelliferous medicinal plants and is subjected to infection by Sclerotinia sclerotiorum (Lib.) de Bary, causing economic losses in plant stand and yield ill Egypt. Biological control of S. sclerotiorum using algal filtrates of Nostoc spp., Oseillatoria spp., Spirulina platensis, Chiorella spp., Anabaena oryzae, Wollea spp., Anabaenaflos-aquae and N. humifusum as well as the commercial biocides namely; RhizoN, Plant guard, Bio-ARC and Bio-Zeid were evaluated under laboratory and greenhouse conditions. AU the tested algal filtrates, except those of Anabaena oryzae and Wollea spp., have significantly reduced the mycelial growth of S. sclerotiorum. However, filtrates of Nostoc spp., Oseillatoria spp. and S. platensis completely inhibited the radial growth of the fungus and significantly decreased dampingoff percentages and increased length of shoot-and root systems, plant fresh weight and number of branch es/plant. All the used biocides have significantly reduced the radial growth of S. scleratlorum. Rhizo-N gave the highest inhibition followed by Plant guard. The least inhibition of S. scleratiarum growth was recorded by Bio-ARC and Bio-Zeid. Rhizo-N decreased damping-off percentages and increased the length of shoot and root systems, plant fresh weight and number of branches/plant.

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