Two granular formulations of Fusarium oxysporum f.sp. orthoceras to mitigate sunflower broomrape Orobanche cumana |
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| Authors: | D Müller-Stöver H Thomas J Sauerborn J Kroschel |
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| Institution: | (1) University of Hohenheim, Institute of Plant Production and Agroecology in the Tropics and Subtropics (380), 70593 Stuttgart, Germany;(2) Nisso Chemical Europe GmbH, Steinstraße 27, 40210 Düsseldorf, Germany;(3) University of Hohenheim, Institute of Plant Production and Agroecology in the Tropics and Subtropics (380), 70593 Stuttgart, Germany |
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| Abstract: | Fusarium oxysporum Schlecht. f.sp. orthoceras (Appel & Wollenw.) Bilai, a potential biocontrol agent against Orobanche cumana Wallr.,was formulated into two granular forms, wheatflour kaolin (`Pesta') granules and sodium alginatepellets. The formulations were compared in terms ofeffectiveness for mitigating O. cumanaparasitism in sunflower and shelf-life forstorage. `Pesta' granules reduced the emergence of O. cumana shoots by 64% while sodium alginatepellets did not reduce the emergence rate but increased thepercentage of diseased O. cumana plants.Calculated efficacy of the application was better for`Pesta' granules. Viability of the formulatedmaterial tested in the laboratory was higher in sodium alginatepellets than in the `Pesta' formulation.However, a loss of virulence after six months of storage wasalso observed in sodium alginate pellets in agreenhouse experiment. |
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| Keywords: | biological control formulation Fusarium oxysporum mycoherbicide Orobanchaceae Orobanche cumana |
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