Gesunde Pflanzen (2011) 63, 175-182

Monika Goßmann, Alexandra Scholz, Frank Hennig, Susanne von Bargen and Carmen Büttner (2011)
Fusarium oxysporum- und F. proliferatum-Isolate aus Spargel und deren Pathogenitätsüberprüfung in einer modifizierten in vitro-Schnelltestmethode
[Evaluation of the pathogenicity of Fusarium oxysporum and F. proliferatum isolates from asparagus using a modified in vitro quick test method]
Gesunde Pflanzen 63 (4), 175-182
Abstract: Fusarium oxysporum and Fusarium proliferatum are important causal agents of crown and root rot of asparagus. In order to detect differences in pathogenicity and aggressiveness, two F. proliferatum and five F. oxysporum single spore isolates from asparagus spears from plantings in Austria and Germany, 55 pure cultures of F. oxysporum from asparagus roots from a planting in Hesse, Germany, and a single F. oxysporum isolate from an asparagus shoot collected in Austria were evaluated in a 28-day quick test on Hoagland's agar in glass culture tubes. Plantlets were inoculated with spore suspensions from each respective isolate after 14 days of growth under sterile, controlled conditions in a growth chamber. A severity scale was used to assess symptoms on roots two weeks after inoculation. The effects of the single-spore isolates on root and shoot fresh weights of the plantlets were also determined.
The pathogenicity of the majority of the F. proliferatum and F. oxysporum isolates included in this study was confirmed. Inoculation with pure and single-spore cultures resulted in elevated disease severity in comparison to non-inoculated controls. In particular, the two F. proliferatum isolates were found to be more aggressive than the F. oxysporum isolates. Moreover, all single spore isolates caused a reduction in fresh weight of roots and shoots in comparison to the controls. With respect to differences among asparagus cultivars, "Ramos", was found to be more susceptible than "Ravel".
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: German)
Link to article at publishers website
Database assignments for author(s): Susanne von Bargen, Monika Goßmann

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Fusarium oxysporum	Asparagus (Asparagus officinalis)	Austria
	Fusarium oxysporum	Asparagus (Asparagus officinalis)	Germany
	Fusarium proliferatum	Asparagus (Asparagus officinalis)