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ARS Home » Pacific West Area » Wenatchee, Washington » Physiology and Pathology of Tree Fruits Research » Research » Publications at this Location » Publication #313294

Title: Effect of anaerobic soil disinfestation and Brassica seed meal amendment on soil biology and system resistance

item Mazzola, Mark
item Strauss, Sarah
item SHENNAN, CAROL - University Of California
item MURAMOTO, JOJI - University Of California

Submitted to: North American Strawberry Conference Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 1/20/2015
Publication Date: 2/12/2015
Citation: Mazzola, M., Strauss, S.L., Shennan, C., Muramoto, J. 2015. Effect of anaerobic soil disinfestation and Brassica seed meal amendment on soil biology and system resistance. North American Strawberry Conference Abstracts. N/A.

Interpretive Summary:

Technical Abstract: Brassica seed meal amendments and anaerobic soil disinfestation control a spectrum of soil-borne plant pathogens via a diversity of mechanisms. Transformations in microbial community structure and function in certain instances were determinants of disease control and enhanced plant performance. For instance, in certain strawberry soils, carbon-source dependent efficacy of ASD was associated with increased abundance of bacteria in phylum Bacteroidetes; specific genera of which are known to provide biological disease control. Brassica seed meal amendment resulted in development of a soil system suppressive towards disease incited by the root pathogens Pythium spp. and Rhizoctonia solani. The apparent functional mechanisms responsible for disease suppression differed with the target pathogen. Seed meal treated systems exhibit resistance to re-infestation by the plant parasitic nematode Pratylenchus penetrans. System resistance is associated with significant and prolonged changes in rhizosphere microbiology and specifically amplification of specific organisms with potential to parasitize P. penetrans.