BRIGIT Consortium Meetings 2020/21 – Wednesday 16 December
Xylella is not present in the UK, but should it arrive, then the eco-epidemiology needs to be understood.
However, there is a great deal of uncertainty over the UK pathosystem compared to the known outbreak locations.
This BRIGIT Consortium Meeting session will present the latest Xylella findings from the BRIGIT project, shedding light on some of the uncertainties in a UK context. The presentations in this session will focus on:
- Vector distribution, densities, host plant preferences and dispersal
- Host plant susceptibility
- Characteristics of the horticultural trade network
- Stakeholder responses to regulation
- Modelling spread in the UK for risk assessment and control
An inherent challenge for policy in combatting emerging disease is the uncertainty associated with intervention planning in areas not yet affected, based on models and data from current outbreaks.
Highlighting the Xylella knowledge gaps in a UK context and how the BRIGIT project fills these.
Flavia Occhibove, Daniel Chapman, Alex Mastin, Stephen Parnell, Barbara Agstner, Rosa Amboage, Glyn Jones, Michael Dunn, Chris Pollard, James Robinson, Mariella Marzano, Althea Davies, Rehema White, Andrew Fearne and Steven White (presenter)
Insect Vector Distribution, Densities and Host Plant Preferences
Spittlebugs would be potential vectors of Xylella if the disease arrived in the UK.
Citizen science data is presented on the geographical distribution of spittlebugs across the UK and their food plant preferences, as well data on spatial variation in population densities.
Alan Stewart (presenter), Claire Harkin, Mike Wilson, Katherine Lester, Rebecca Cairns, Sam Mugford, Flavia Occhibove, Steven White, Ana Perez-Sierra, Gerard Clover and Sarah Plummer
Short Range Vector Dispersal
Mark-release-recapture experiments to estimate the movement of adult Philaenus spumarius in grassland communities in northern England.
Comparisons are made with the studies of vector movement in Xylella outbreak locations.
Simon Conyers (presenter), Chris Malumphy, Damian De Marzo and Rachel Down
Long Range Vector Dispersal
It is well known that a key driver of Xylella spread is attributed to long-distance vector dispersal, but this is poorly understood.
Using novel molecular methods, we quantify the long-distance dispersal.
Roberto Biello, Qun Liu, Sam Mugford, Alan Stewart, Claire Harkin, Katherine Lester, Rebecca Cairns, Michael Wilson, Simon Conyers, Duncan Allen, Damian De Marzo, Gerard Clover, Thomas Mathers & Saskia Hogenhout (presenter)
Host Plant Susceptibility
The UK’s environment and host plants are different to that in the outbreak zones in Southern Europe.
We detail glasshouse experiments that help to fill this crucial knowledge gap by studying the spread of the bacteria and symptom development in key hosts maintained in different conditions.
Jenny Cole, Adam Bryning, Eleanor Jones, John Elphinstone and Joana Vicente (presenter)
Human Behaviour in the UK Trade Network
The decisions made by people in the horticultural trade on sourcing and distribution of plants will mediate how Xylella could travel through the trade network.
Here we discuss how the characteristics of business to business relationships can impact potential spread of infected plants and disease management actions.
Chris Pollard (presenter) and Mariella Marzano
Stakeholder Risk Perception and Potential Responses to Biophysical and Regulatory Contexts
Understanding what stakeholders know about Xylella and how they may respond to different disease and regulatory scenarios is important to help us model and design appropriate management strategies.
We discuss key stakeholder perceptions and relate these to other cases of regulation for complex, unpredictable challenges.
Rehema White (presenter), Chris Pollard, Mariella Marzano, Althea Davies and James Robinson
Plants for Planting and the Problems of Data
Biosecurity in trade – from nurseries down to consumers – is key to keeping Xylella out of the UK; but what do we actually know about the horticultural industry?
Despite an increase in collaborative work with and within the industry, key data limitations remain. We discuss recent developments and data initiatives, and challenges encountered along the way.
Glyn Jones (presenter), Barbara Agstner, James Rainford and Gabriel Rocki
Modelling Xylella spread in the UK Trade Network
A potential pathway for Xylella to enter and spread in the UK is via the horticultural trade network.
If it did arrive, how might it spread and how does this influence where we should be looking for it?
We present a model that tracks spread in the UK trade network and show how it can help answer question relating to surveillance and control.
Alex Mastin (presenter) and Stephen Parnell
Modelling Xylella spread in the UK Landscape
Should Xylella be introduced into the landscape, how might it spread and are there locations in the UK that are more likely to be severely effected?
We present a new mechanistic model that utilises data from the BRIGIT project to predict the potential spread of Xylella in the UK. Our results highlight areas of concern that are pertinent for risk assessment and policy.
Flavia Occhibove (presenter), Daniel Chapman and Steven White