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From Fungicides to Mycoviruses

Printausgabe
EUR 49,90

E-Book
EUR 34,90

From Fungicides to Mycoviruses (Band 50)

The Control of Rhizoctonia solani in Sugar Beet

Anika Bartholomäus (Autor)

Vorschau

Inhaltsverzeichnis, PDF (33 KB)
Leseprobe, PDF (380 KB)

ISBN-13 (Printausgabe) 9783736995697
ISBN-13 (E-Book) 9783736985698
Sprache Englisch
Seitenanzahl 196
Umschlagkaschierung matt
Auflage 1.
Buchreihe Aus dem Institut für Zuckerrübenforschung Göttingen
Band 50
Erscheinungsort Göttingen
Promotionsort Göttingen
Erscheinungsdatum 26.06.2017
Allgemeine Einordnung Dissertation
Fachbereiche Land- und Agrarwissenschaften
Schlagwörter Rhizoctonia solani, Sugar beet, Fungicides, Mycoviruses, Virome, Azoxysti
Beschreibung

Rhizoctonia root and crown rot, caused by the soil-borne basidiomycete Rhizoctonia solani, is one of the most important diseases in sugar beet and from increasing economic relevance in many European growing areas. In the EU, no fungicides against Rhizoctonia in sugar beet are registered and existing control approaches cannot completely control the disease. Two fungicides were evaluated for their control efficacy using different sugar beet cultivars with varying levels of resistance. The effect on disease severity, white sugar yield (WSY) and soil-borne inoculum, analyzed by qPCR, was determined in naturally infested fields and inoculated trials. Both fungicides showed an excellent disease control with a similar efficacy, securing WSY and reducing the soil-borne inoculum. As an alternative, mycoviruses, which induce hypovirulence, were analyzed as a further approach in the future. They are highly pathogen specific and might deliver long lasting control, once suitable biocontrol agents for Rhizoctonia have been identified. A method for virome characterization based on randomly transcribed dsRNA extracts analyzed by deep sequencing in the combination with the identification of the RdRp domain as virus marker was developed. The virome analysis revealed that the hypovirulent Rhizoctonia isolate DC17 is infested with 17 different mycoviruses of which some show close relation to known hypovirulence inducing viruses.