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Reduced efficacy of biocontrol agents and plant resistance inducers against potato early blight from greenhouse to field

Stridh, Linnea and Mostafanezhad, Hadis and Andersen, Christian Benjamin and Odilbekov, Firuz and Grenville-Briggs Didymus, Laura and Lankinen, Åsa and Liljeroth, Erland (2022). Reduced efficacy of biocontrol agents and plant resistance inducers against potato early blight from greenhouse to field. Journal of Plant Diseases and Protection
[Research article]

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Abstract

Early blight in potato, caused by Alternaria solani, is mainly controlled by frequent applications of synthetic fungicides. Reducing the use of synthetic fungicides in agriculture is desired to reach an overall sustainable development since the active components can be harmful for humans and for the ecosystem. In integrated pest management, IPM, the idea is to combine various measures, including optimized crop management, crop rotation, use of resistant cultivars, biological control agents (BCAs), plant resistance inducers, and fertilizers, to decrease the dependence on traditional chemical fungicides. In this paper, we present the results from greenhouse and field trials where we evaluated the effect of strategies aimed at reducing our reliance on synthetic fungicides including treatments with biological control agents (BCAs) (Pythium oligandrum, Polygandron (R), and Bacillus subtilis, Serenade (R)) and plant resistance inducers (silicon products HortiStar (R) and Actisil (R)) for early blight in potato. The agents were applied separately or in combination with each other or with synthetic fungicides. In the greenhouse, trials application of these agents resulted in 50-95% reduction of infection by A. solani, but their combination did not generally improve the outcome. However, the effects were much smaller in the hand-sprayed field trials, 20-25% disease reduction and almost disappeared in full-scale field trials where application was done with tractor sprayers. In this article, we discuss possible reasons behind the drop in efficacy from greenhouse trials to full-size field evaluation.

Authors/Creators:Stridh, Linnea and Mostafanezhad, Hadis and Andersen, Christian Benjamin and Odilbekov, Firuz and Grenville-Briggs Didymus, Laura and Lankinen, Åsa and Liljeroth, Erland
Title:Reduced efficacy of biocontrol agents and plant resistance inducers against potato early blight from greenhouse to field
Series Name/Journal:Journal of Plant Diseases and Protection
Year of publishing :2022
Number of Pages:16
Publisher:SPRINGER HEIDELBERG
ISSN:1861-3829
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Keywords:Alternaria solani, Biological control, Biocontrol agents, Plant resistance inducer, Potato disease, Field trials
URN:NBN:urn:nbn:se:slu:epsilon-p-118267
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-118267
Additional ID:
Type of IDID
DOI10.1007/s41348-022-00633-4
Web of Science (WoS)000815580500001
ID Code:28657
Faculty:LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(LTJ, LTV) > Department of Plant Protection Biology
Deposited By: SLUpub Connector
Deposited On:30 Aug 2022 13:52
Metadata Last Modified:30 Aug 2022 14:01

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