Modelling the dynamics of a plant pathogen and a biological control agent in relation to flowering pattern and populations present on leaves
File(s)
Accepted version
Author(s)
Jeger, MJ
Xu, X-M
Type
Journal Article
Abstract
A flexible model for biological control of a plant pathogen affecting host flowers is developed which takes into account the transfer of both the plant pathogen and the biological control agent (BCA) from the leaves to flowers. Because flowers, other than in ornamental plants, are largely ephemeral, the emphasis in analysis is on the rates of transfer and establishment on flowers. The form of the model analysed depends upon: the pattern of flowering for a particular host plant, a single instantaneous flush or continuous seasonal production; the effect of flowering phenology and morphology on transfer of both the pathogen and BCA; and the transient dynamics of such transfer. In the case of a single instantaneous flush, the relative importance of mycoparasitism and competition in protecting flowers during their short period of blooming is assessed. Where flowering is continuous but transfer lags behind because of floral phenology or morphology, a comparison is made between the initial levels of the pathogen and the BCA as they transfer to the flowers, depending again on the relative contribution of mycoparasitism and competition over the extended period of blooming. Differential rates of transfer of the pathogen and the BCA, depending on their time-dependent population densities on leaves, have a major impact on eventual biocontrol outcomes. The model results are used to analyse biocontrol strategies for contrasting host-pathogen systems which show different flowering patterns and biological control mechanisms. For Erwinia amylovora causing fireblight in pome fruit trees, an inundative biocontrol strategy targeting flowers is supported. In Botrytis cinerea, there is considerable potential for a strategy based on the establishment of BCAs on leaves for some of the plant hosts affected.
Date Issued
2015-10-10
Date Acceptance
2015-06-07
Citation
Ecological Modelling, 2015, 313, pp.13-28
ISSN
0304-3800
Publisher
Elsevier
Start Page
13
End Page
28
Journal / Book Title
Ecological Modelling
Volume
313
Copyright Statement
© 2015 Elsevier B.V. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000361865000002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Life Sciences & Biomedicine
Ecology
Environmental Sciences & Ecology
Biological control
Flower diseases
Epidemiological model
Invasion thresholds
STRAWBERRY GRAY MOLD
CONTROLLING FOLIAR PATHOGENS
COMBINING BIOCONTROL AGENTS
BOTRYTIS-CINEREA
ERWINIA-AMYLOVORA
CLONOSTACHYS-ROSEA
FIRE BLIGHT
PANTOEA-AGGLOMERANS
PSEUDOMONAS-FLUORESCENS
GLIOCLADIUM-ROSEUM
Publication Status
Published
Date Publish Online
2015-07-03