A commercial iron fertilizer increases the survival of Fusarium oxysporum f. sp. orthoceras propagules in a wheat flour-kaolin formulation

Dorette Müller-Stöver*, Joachim Sauerborn

*Corresponding author af dette arbejde
6 Citationer (Scopus)

Abstract

Fusarium oxysporum f.sp. orthoceras, a potential biocontrol agent against the parasitic weed Orobanche cumana Wallr., has proven to be efficacous under greenhouse conditions when formulated as wheat-kaolin granules. To help minimize the loss of viable fungal propagules during the formulation process, the addition of a commercial fertilizer containing the iron chelate of EDDHA to the formulation was investigated. The proportion of surviving propagules was significantly increased after adding the fertilizer. However, growing conidia in fertilizer-amended liquid medium did not reduce losses in viability during formulation. The efficacy of the formulated fungus and the storability at room temperature for the first 3 months was not affected by the iron fertilizer. The protective effect could neither be obtained with the chelator EDDHA alone nor with FeEDTA or FeSO4.

OriginalsprogEngelsk
TidsskriftBiocontrol Science and Technology
Vol/bind17
Udgave nummer6
Sider (fra-til)597-604
Antal sider8
ISSN0958-3157
DOI
StatusUdgivet - 2007
Udgivet eksterntJa

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