Title: Laboratory investigation of cauliflower–fungus–insect interactions for cabbage Maggot control
Authors : Razinger, Jaka
Lutz, Matthias
Grunder, Jürg
Urek, Gregor
Published in : Journal of economic entomology
Volume(Issue) : 111
Issue : 6
Pages : 2578
Pages to: 2584
Publisher / Ed. Institution : Oxford University Press
Issue Date: 2018
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : Biological control; Entomopathogenic fungi; Plant–microbe–insect interaction; Rhizosphere competence; Soil pest
Subject (DDC) : 630: Agriculture
Abstract: The cabbage maggot (also known as cabbage root fly [CRF]; Delia radicum L.) is a serious pest of brassicas. The pest's soil-dwelling larvae are especially damaging to young brassica transplants. In light of toxic soil insecticide phase-out novel biocontrol management solutions are sought for. Our research is focused on the development of a biological control strategy involving cauliflower plantlet inoculation with insect pathogenic fungi. This article presents the results of a laboratory investigation of cauliflower × microbe × CRF interactions. Seven isolates of fungi (entomopathogenic and rhizosphere-competent fungi and soil saprotrophs) were tested for their pathogenicity to CRF and their effects on cauliflower plantlets. The laboratory experiments were performed in sterilized substrate. Several strains significantly increased CRF mortality, some at par with a commercial bioinsecticide based on B. bassiana (Balsamo-Crivelli) Vuillemin (Hypocreales: Cordycipitaceae). All strains colonized the rhizoplane, however to varying extent. Some isolates were also reisolated from within healthy plant tissues and thus identified as endophytes. The method of applying conidia had a significant effect on survival and weight of seedlings and rhizoplane and endophytic colonization rates. Two Metarhizium brunneum Petsch (Hypocreales: Clavicipitaceae) isolates exhibited plant growth promotion effects when ungerminated seeds were coated with conidia. The ecological implications of plant × microbe × pest interactions and options for improving the effectiveness of a fungal-based biological CRF management strategy are discussed.
Departement: Life Sciences and Facility Management
Organisational Unit: Institute of Natural Resource Sciences (IUNR)
Publication type: Article in scientific Journal
DOI : 10.1093/jee/toy228
ISSN: 0022-0493
1938-291X
URI: https://digitalcollection.zhaw.ch/handle/11475/16367
Appears in Collections:Publikationen Life Sciences und Facility Management

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