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Hutzenlaub, Natalie, 2010. Assessment of soil suppressiveness : the system of fusarium foot rot on wheat. Second cycle, A2E. Uppsala: SLU, Dept. of Forest Mycology and Plant Pathology

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Abstract

The soil suppressiveness to fusarium foot rot caused by Fusarium graminearum and Fusarium culmorum was assessed by two complementary analyses: the bioassay and the fungistasis test. The bioassay addresses suppressiveness to fusarium foot rot and the fungistasis test evaluates the pathogen suppression capacity of different soil samples. A field experimental set up to study effects of conventional and reduced tillage and different preceding crops (wheat, oat and oilseed rape) was used for the study. In addition to establish the methodology for assessing the suppressiveness to fusarium foot rot caused by F. graminearum and F. culmorum, the different cultural practices were evaluated in their impact on the suppressiveness. Reduced tillage increased the suppressiveness to fusarium foot rot caused by F. graminearum, since reduced tillage decreased disease severity of the wheat plant growing on soil with wheat as preceding crop in the bioassay. In addition, reduced tillage decreased the germination rate of conidia spores of F. graminearum in the fungistasis test. For F. culmorum, no impact of the tillage treatment on the suppressiveness could be detected. Soil with oilseed rape as preceding crop showed the lowest disease incidence in the bioassay, what suggests that crop rotation with oilseed rape increases the suppressiveness to fusarium foot rot. Cultural practices which showed a significant effect on disease suppression, did not necessarily show an effect on pathogen suppression which was also influenced by the two Fusarium species differently due to their different ecology.

Main title:Assessment of soil suppressiveness
Subtitle:the system of fusarium foot rot on wheat
Authors:Hutzenlaub, Natalie
Supervisor:Friberg, Hanna and Friedel, Jürgen
Examiner:Funck Jensen, Dan
Series:UNSPECIFIED
Volume/Sequential designation:UNSPECIFIED
Year of Publication:2010
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:NM004 Ecology - Master's Programme 120 HEC
Department:(NL, NJ) > Dept. of Forest Mycology and Plant Pathology
(S) > Dept. of Forest Mycology and Plant Pathology
Keywords:bioassay, Fusarium graminearum, Fusarium culmorum, tillage, preceding crop
URN:NBN:urn:nbn:se:slu:epsilon-8-911
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-8-911
Subjects:Agricultural research
Plant diseases
Soil science and management
Language:English
Deposited On:16 Dec 2010 15:14
Metadata Last Modified:20 Apr 2012 14:17

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