IPRRG Webinar Series

Because of the COVID-19 global pandemic, we haven’t enjoyed many chances to engage as a group. Although virtual events aren’t a perfect replacement for in-person engagement, they are still a useful way to share and communicate ideas. So, we are pleased to offer the IPRRG Webinar Series!

We intend to have webinars as often as possible throughout 2021 (and hopefully well into 2022!). The presentations will cover an array of topics related to pest risk modelling and analysis. The time slots for each webinar will vary to best accommodate the speakers. As we solidify the slate of upcoming presenters, we will post additional details to this page.

Starting with the January 2022 webinar, we’ll be using Zoom (via Luma) for the live webcast. *Each webcast can be accessed at the scheduled time using the LIVE WEBCAST LINK in the table below.* A big red “JOIN” button should appear on the event page an hour before it starts. Anyone can access the webcast via this link (i.e., you don’t have to be an IPRRG member to attend the webinar). However, we encourage you to follow the link now and register in advance! This is an easy way to have the webinar added to your calendar and get reminders. It will also let us know who’s planning to attend.

Afterward, a recorded version of the webinar will be available indefinitely from the IPRRG YouTube channel. Links to each of the YouTube recordings are provided in the table, or you can visit our channel to see all of them.

We are excited to provide this opportunity to the pest risk community! Please feel free to share the news (and the URL for this page) widely. Our goal is have a large audience for each of our presenters.

If you have any questions or are interested in presenting your own webinar, please contact Frank Koch, IPRRG Communications Officer (frank.h.koch “AT” usda.gov).

IPRRG WEBINAR SERIES SCHEDULE

PresenterDate / TimeTitleLinks
Darren Kriticos, CSIRO (Australia)Jan 28, 2021 8:00 AM – 9:00 AM AEDT
(Jan 27, 4:00 PM – 5:00 PM EST US/CAN; 9:00 PM – 10:00 PM GMT; 10:00 PM – 11:00 PM CET)
IPRRG Webinar Series and Pest Risk Model DatabaseWebcast recording: https://webcast.csiro.au/#/webcasts/iprrg1

YouTube recording:
https://youtu.be/ZMPGDgcMdv0
Matthew Everatt, Defra (UK)Feb 25, 2021 8:00 AM – 9:00 AM AEDT
(Feb 24, 4:00 PM – 5:00 PM EST US/CAN; 9:00 PM – 10:00 PM GMT; 10:00 PM – 11:00 PM CET)
Risk Assessment for Biological Control ReleasesWebcast recording:
https://webcast.csiro.au/#/webcasts/iprrg2

YouTube recording:
https://youtu.be/xpcfiPou2sA
Katherine O’Donnell, Botanic Gardens Conservation International; Charles Lane and Chris Malumphy, Fera Science LtdMar 17, 2021 8:00 PM – 9:00 PM AEDT
(Mar 17, 5:00 AM – 6:00 AM EDT US/CAN; 9:00 AM – 10:00 AM GMT; 10:00 AM – 11:00 AM CET)
The International Plant Sentinel NetworkWebcast recording:
https://webcast.csiro.au/#/webcasts/iprrg3

YouTube recording:
https://youtu.be/iR-nhZ5hLD4
Tania Yonow, CSIRO (Australia)April 30, 2021 6:00 PM – 7:00 PM AEST
(April 30, 4:00 AM – 5:00 AM EDT US/CAN; 9:00 AM – 10:00 AM BST; 10:00 AM – 11:00 AM CEST)
Accidental Pre-emptive Biocontrol for the Brown Marmorated Stinkbug?Webcast recording:
https://webcast.csiro.au/#/webcasts/iprrg4

YouTube recording:
https://youtu.be/ekNz9emoTcw
Andrew Robinson, University of Melbourne (Australia)May 28, 2021 8:00 AM – 9:00 AM AEST
(May 27, 6:00 PM – 7:00 PM EDT US/CAN; 11:00 PM – 12:00 AM BST; May 28, 12:00 AM – 1:00 AM CEST)
Context Is Everything: Sampling for Area FreedomWebcast recording:
https://webcast.csiro.au/#/webcasts/iprrg5

YouTube recording link:
https://youtu.be/LwxWB1vxcJs
Catriona Duffy, Maynooth University (Ireland)June 23, 2021 5:00 PM – 6:00 PM AEST
(June 23, 3:00 AM – 4:00 AM EDT US/CAN; 8:00 AM – 9:00 AM BST; 9:00 AM – 10:00 AM CEST)
Using Hierarchical Clustering to Identify High Risk Pests to Sitka SpruceWebcast recording:
https://webcast.csiro.au/#/webcasts/iprrg6

YouTube recording link:
https://youtu.be/CynnKbxsQkM
Debbie Hemming, Met Office (UK)July 29, 2021 5:30 PM – 6:30 PM AEST
(July 29, 3:30 AM – 4:30 AM EDT US/CAN; 8:30 AM – 9:30 AM BST; 9:30 AM – 10:30 AM CEST)
Integrating Microclimate Models into Pest Risk AnalysisWebcast recording:
https://webcast.csiro.au/#/webcasts/iprrg7

YouTube recording link:
https://youtu.be/2uNfVny-0VU
Ruan C. de M. Oliviera, Universidade Federal do Ceará (Brazil)August 26, 2021 8:00 AM – 9:00 AM AEST
(August 25, 6:00 PM – 7:00 PM EDT US/CAN; 7:00 PM – 8:00 PM Brasilia; 11:00 PM – 12:00 AM BST)
Current and Future Potential Distributions of Helicoverpa punctigera (Lepidoptera: Noctuidae): Is This the Next FAW?Webcast recording:
https://webcast.csiro.au/#/webcasts/iprrg8

YouTube recording link:
https://youtu.be/EwXmxExLSUY
Melanie Newfield (New Zealand)Nov 5, 2021 8:00 AM – 9:00 AM AEDT
(Nov 5, 10:00 AM – 11:00 AM Wellington;
Nov 4, 5:00 PM – 6:00 PM EDT US/CAN; 10:00 PM – 11:00 PM CET)
The Use of Risk Assessment and Decision Making in the Biosecurity SystemWebcast recording:
https://webcast.csiro.au/#/webcasts/iprrg9

YouTube recording link:
https://youtu.be/IeXeFeBNHfE
Antigoni Akrivou, Benaki Phytopathological Institute (Greece)Dec 16, 2021 17:00 PM – 18:00 PM AEDT
(Dec 16, 1:00 AM – 2:00 AM EST US/CAN; 7:00 AM – 8:00 AM CET; 8:00 AM – 9:00 AM Athens)
Potential Global Distribution of Aleurocanthus woglumi (Hemiptera: Aleyrodidae) and the Risk Posed to EuropeWebcast recording: https://webcast.csiro.au/#/webcasts/iprrg10

YouTube recording link: https://youtu.be/rplYhmPG8Pg
Denys Yemshanov, Natural Resources Canada, Canadian Forest ServiceJan 28, 2022 8:00 AM – 9:00 AM AEDT (Jan 27, 4:00 PM – 5:00 PM EST US/CAN; 9:00 PM – 10:00 PM GMT; 10:00 PM – 11:00 PM CET)Bi-Level Governance in Pest Survey Campaigns: How Can Game Theory Help?YouTube recording link: https://youtu.be/OIsDqrVXrlE
Anna Szyniszewska, CABI (UK) and Corvus Geostat (Poland)Mar 19, 2022 1:00 AM – 2:00 AM AEDT
(Mar 18, 10:00 AM – 11:00 AM EDT US/CAN; 2:00 PM – 3:00 PM GMT; 3:00 PM – 4:00 PM CET)
Fruit Flies in a Warming World – Models and Evidence of Range ExpansionYouTube recording link:
https://youtu.be/rOfWxr0fx14
Sonia Baldi, Abu Dhabi Agriculture and Food Safety Authority (ADAFSA)April 12, 2022 4:00 PM – 5:00 PM AEST (2:00 AM – 3:00 AM EDT US/CAN; 7:00 AM – 8:00 AM BST; 10:00 AM – 11:00 AM Abu Dhabi)Pest Risk Register and Integrated Risk Assessment Tool for ADAFSAYouTube recording link:
https://youtu.be/fs0ItuGiKvg
Emma Hudgins, Carleton University (Canada)July 14, 2022 4:00 AM – 5:00 AM AEST
(July 14, 6:00 AM – 7:00 AM Wellington; July 13, 2:00 PM – 3:00 PM EDT US/CAN; 8:00 PM – 9:00 PM CEST)
New Perspectives in Urban Forest Invader ManagementYouTube recording link:
https://youtu.be/uPpmb_2YjBQ

Abstracts

IPRRG Webinar #1: Darren Kriticos

IPRRG Webinar Series and Pest Risk Model Database

Pest risk models have become key instruments in global biosecurity, helping to identify areas at risk of invasion by harmful alien organisms. The ability to discover and access pre-existing models is critical to ensure that the global biosecurity system operates efficiently and effectively. The development of pest risk modelling methods, particularly in a geographical context, has centred on collaborations between scientific researchers and pest risk management agencies. Most early pest risk models (and maps) were published in peer-reviewed scientific journals, which provided a degree of quality assurance and discoverability, at least in academic circles.  As the technology has matured and some biosecurity agencies have built in-house pest risk modelling capability, it is likely that a large share of recent modelling efforts have gone unpublished or ended up in “grey” literature, where they are far less accessible and discoverable. Undoubtedly, this can lead to global inefficiency as models are recreated for the same species. Most of these risk models are based on bioclimatic models, and most of them are global, or can be applied globally. Consequently, while they may be developed with the intention of identifying the risks in one region, they may be valuable for identifying risks to other jurisdictions.  This offers the potential for developed models to be used by biosecurity agencies that may not have the resources to develop their own models. To tackle these issues, IPRRG has developed an online database of pest risk models. The database is intended to support crowdsourcing of entries.  In this presentation, Darren explains the motivation to develop the database, demonstrates its operation and comments on the value of the platform for PRA praxis, and outlines some ongoing issues.


IPRRG Webinar #2: Matthew Everatt

Risk Assessment for Biological Control Releases

Until recently, invertebrate biological control agents (IBCAs) were unregulated in Europe, under the assumption that they had little or no impact on the environment. However, towards the end of the 20th century, perceptions were beginning to change and there was an increasing concern that IBCAs may cause harm to the environment and to non-target organisms. The harlequin ladybird, Harmonia axyridis, which was released into France in the 1990s without assessment, is a case in point; although beneficial in killing aphid pests, the harlequin ladybird harbours a number of negative traits, such as feeding on non-target organisms. If a risk assessment had been carried out, it is highly likely that its release would not have been allowed.

In 1996, the International Organisation for Biological and Integrated Control (IOBC) and the European Plant Protection Organisation (EPPO) established a panel, which provided guidance on the import and release of IBCAs. This was followed by CHIBCA and the EU funded REBECA project, which reviewed previous recommendations and guidelines, and engaged with industry, regulators and scientists to produce coordinated guidelines for Europe.

Defra has used these guidelines to establish a regulatory framework for England. Licences are granted for invertebrate non-native species to be used as augmentative and classical biological control agents. For new species that have not previously been released in England, a risk assessment is required to ensure the species are safe and fit for purpose. This assessment covers establishment potential, host specificity, dispersal and impacts. While some other European countries have a similar regulatory framework, there are a number that differ, making it more difficult to release weed biocontrols across Europe. There are also some countries that do not have any regulation at all, leaving countries with regulation susceptible to incursion from risky IBCAs. A more harmonised system across Europe is therefore recommended.


IPRRG Webinar #3: Katherine O’Donnell, Charles Lane and Chris Malumphy

The International Plant Sentinel Network

The International Plant Sentinel Network (IPSN) consists of botanic gardens & arboreta, National Plant Protection Organisations (NPPO’s) and plant-health scientists who collaborate to provide an early-warning system for new and emerging plant pests and diseases.

Botanic gardens and arboreta are unique and under-utilised resources that can support sentinel research. Plant collections are estimated to include 30–40% of all known plant species, many of which are exotic species (and thus potential sentinel plants). Sentinel plants are individuals found outside their native ranges that can be surveyed for damage by organisms they would not otherwise encounter.

The IPSN also focuses on increasing knowledge and awareness, gathering evidence for pest risk analysis, seeking best practice, developing standardised approaches and providing training materials and methodologies for monitoring and surveying. Established as part of a European-funded (EUPHRESCO) project the IPSN is coordinated by Botanic Gardens Conservation International (BGCI) and supported by the UK’s Food and Environment Research Agency (FERA).


IPRRG Webinar #4: Tania Yonow

Accidental Pre-emptive Biocontrol for the Brown Marmorated Stinkbug?

The brown marmorated stinkbug (Halyomorpha halys) is a familiar topic for IPRRG, resulting in ‘Project Stinky’. This project had several facets, including understanding the potential distribution and impact of H. halys.The difficulties in managing this important horticultural pest has spawned interest in biological control programs. A critical question in classical biological control is the degree of overlap in the potential distributions of the agent and the target. This question can be addressed in part using pest risk assessment tools. This presentation describes work conducted to examine the niche overlap of two wasp parasitoids of H. halys, with particular interest in their potential distribution in Australia. One of the wasps, Trissolcus mitsukurii, was introduced to Australia in 1962 to control the green vegetable bug (Nezara viridula). One of our questions was the degree to which this wasp might play a role in controlling H. halys (if/when) it becomes established there. We began by examining the potential distribution of T. mitsukurii, which currently occurs in Asia (native range) and Australia and Italy (invaded ranges). We attempted some novel analyses with the CLIMEX Match Climates program to specifically account for the use of irrigation in agriculture, and then used the more standard CLIMEX Compare Locations program. Once we had the Compare Locations model for T. mitsukurii, we applied the same irrigation scenario to existing CLIMEX models for both H. halys and the second key parasitoid, Trissolcus japonicus, and examined the range overlaps of the three species. All species are projected to expand their current ranges, with sympatric ranges in most invaded regions. Trissolcus japonicus has recently been shown to be polyphagous, but nonetheless has been approved for release in New Zealand should H. halys become established there. While it is unlikely to be approved for intentional release in Australia, it is also highly invasive and will likely spread to Australia unassisted. This suggests that both Trissolcus species should be able to help mitigate the impacts of H. halys as it spreads, and is supported by recent work in Italy and Switzerland, showing the concurrent spread of both T. mitsukurii and T. japonicus alongside that of H. halys.


IPRRG Webinar #5: Andrew Robinson

Context Is Everything: Sampling for Area Freedom

ISPM 31 prescribes an approach to sampling for proof of freedom that is based on specifying a probability that the pest will be detected if it is present at a nominated prevalence. However, the approach provides no insight as to how the probability or prevalence should be set. We assert that agencies should seek to minimise the net expected costs of surveillance and the expected damages that would occur, should the pest still be present. By wrapping the existing approach in an economic framework, we can shed light on the implications of different choices from the point of view of making decisions. We illustrate the method’s implementation using information contained in two historical proof of freedom proposals conducted in Queensland for cocoa pod borer (Conopomorpha cramerella) and citrus canker (Xanthomonas axonopodis), and contrast the differences in the required levels of effort.


IPRRG Webinar #6: Catriona Duffy

Using Hierarchical Clustering to Identify High Risk Pests to Sitka Spruce

The presence of a species within a specific region indicates that suitable biotic and abiotic conditions exist for that pest. Therefore, grouping regions based on a species’ presence or absence indicates a level of similarity of those same conditions. This is the fundamental assumption underpinning the application of hierarchical clustering to assemblages of pests of Sitka spruce in order to identify high risk pests to Ireland. A region’s pest assemblage is the result of a multitude of complex biotic (e.g. host) and abiotic (e.g. climatic) factors within that area and that these pest profiles act as a proxy for these factors when attempting to group ‘like’ pest organisms together. Presence/absence data for 1000 pests across 386 regions globally were clustered based on their similarity of pest assemblages, to provide an objective examination of the highest risk pests to Irish forestry. Outputs from the analysis suggest that the highest risk pests to Ireland’s Sitka spruce plantations will originate from within Europe. This approach is useful from a ‘horizon scanning’ and resources perspective, as it aids in identifying pests for further detailed analysis using Pest Risk Analysis (PRA).


IPRRG Webinar #7: Debbie Hemming

Integrating Microclimate Models into Pest Risk Analysis

The UK Met Office and University of Exeter have been collaborating closely with the UK Department for Environment, Food and Rural Affairs’ (Defra’s) Plant Risk and Horizon Scanning team to improve the use of climate data and climate modelling for informing UK pest risk assessment. We present a brief overview of this work and highlight recent microclimate modelling efforts to better understand the climate at locations relevant for pest life-cycle development.


IPRRG Webinar #8: Ruan C. de M. Oliviera

Current and Future Potential Distributions of Helicoverpa punctigera (Lepidoptera: Noctuidae): Is This the Next FAW?

Helicoverpa punctigera (Wallengren), the native budworm, is an important highly-polyphagous pest that has caused serious damage on a wide variety of crops in Australia. In Australia, its range overlaps that of its congener, Helicoverpa armigera (Hübner), a notorious invasive pest globally. We used CLIMEX, a bioclimatic niche modelling software package, to estimate the potential geographical distribution of H. punctigera under current and future climates (A1B scenario). Under both current and future climate conditions, the model indicates that H. punctigera could establish throughout the tropics and subtropics. Comparing the potential distributions under each climate scenario revealed that in the future its potential distribution is likely to shift poleward and into higher altitudes, into areas that are currently too cold as observed in the South of Brazil, Europe, North America, South East Asia, and South Pacific Islands including New Zealand. The projected potential distribution can inform pre- and post-border biosecurity strategies for the management of this pest in each country.


IPRRG Webinar #9: Melanie Newfield

The Use of Risk Assessment and Decision Making in the Biosecurity System

  • The research programme “He Tangata, He Taiao, He Ōhanga” (translated as “the people, the environment, the economic”) aims to develop a new biosecurity risk assessment framework that incorporates information from a holistic set of values.
  • Before researchers developed a new framework, I reviewed literature and spoke to decision makers to determine what frameworks, models and tools are already available to support risk assessment and decision making in the biosecurity system. I also looked more generally at decision makers’ attitudes towards risk assessment.
  • While there are many frameworks, models and tools for both risk assessment and decision making, I found that they are not widely used for biosecurity decision making.
  • Many published frameworks for risk assessment and decision making are developed for specific purposes or to answer specific questions and can’t be adopted for other purposes without modification. Some of the stated reasons that frameworks aren’t used are similar to reasons that models weren’t used to make decisions in conservation.
  • For the decision makers I spoke to in the study, trust is central to the worth that they place on risk assessment, particularly trust in the people doing risk assessments. Rather than some decision makers trusting risk assessors and some decision makers not trusting them, the majority of decision makers trusted some risk assessors and not others.
  • The design of frameworks, models and tools needs to address more than just developing tools. The design also needs to consider those who will directly use the framework (for example, risk assessors), and those who will use the results of that framework (for example, decision makers who make decisions based on risk assessment). In particular, the framework needs to be developed in a way that builds trust between those developing the framework and those using the framework.

IPRRG Webinar #10: Antigoni Akrivou

Potential Global Distribution of Aleurocanthus woglumi (Hemiptera: Aleyrodidae) and the Risk Posed to Europe

Citrus blackfly, Aleurocanthus woglumi Ashby, is an agriculturally important polyphagous pest due to the economic losses it causes to citrus and many other plants. As climate changes, the areas at risk from biological invaders shift and so it is important for biosecurity managers to be aware of the emerging threat patterns as they institute phytosanitary measures. We used CLIMEX – a process-oriented climatic niche model – to model the potential global distribution of A. woglumi under an historical climate scenario (centred on 1995) and found that there are current and emerging risks in every continent. Moreover, CLIMEX simulation under the RCP 8.5 climate change scenario for 2050 indicates that its potential distribution is projected to increase across all continents except Africa. In this scenario, the risk of A. woglumi establishing in Europe is high.


IPRRG Webinar #11: Denys Yemshanov

Bi-Level Governance in Pest Survey Campaigns: How Can Game Theory Help?

Large-scale delimiting surveys are critical for detecting the extent of novel pest invasions and often undertaken at different governance levels. In this study, we consider a two-level hierarchical planning of spatial pest surveys – the central government agency with a mandate to report the spatial extent of pest invasion, and regional governments concerned about the possible threat of an outbreak. Central agency plans delimiting pest surveys across multiple administrative subdivisions (counties) in which regional governments could participate in conducting the pest surveys if funds become available. Our goal is to find the optimal levels of cooperation between the central agency and regional governments when the central agency may allocate a portion of the funds to regional governments to reduce the survey cost. We propose a bi-level Stackelberg game model that finds optimal levels of cooperation between two levels of government in pest survey campaigns. The model finds the budget portion and regions where it is optimal to devolve a portion of survey funds to regional governments to improve the survey efficiency.

We apply the model to surveillance of hemlock woolly adelgid, a harmful pest of hemlock trees in Ontario, Canada. Our bi-level model solutions help anticipate the under-performance of surveys conducted by regional governments because their goals do not fully align with the central agency’s survey objective. The bi-level approach offers a realistic assessment of the governance hierarchies in large-scale delimiting pest surveys because it helps the central agency to account for the utility preferences of the regional governments and endogenize their survey decisions concerning their preferences. The methodology can be adapted to explore cost-sharing strategies in governance hierarchies in other regions and administrative jurisdictions.


IPRRG Webinar #12: Anna Szyniszewska

Fruit Flies in a Warming World – Models and Evidence of Range Expansion

We reviewed and refined a published CLIMEX model for Medfly, Ceratitis capitata, a fruit fly of economic importance. We considered recently published experimental results on its ecophysiology and geographic observations in Europe. To assess the model fit, and to aid in interpreting the meaning of the new European distribution records we used the CRU TS4 climate time series dataset to explore the temporal patterns of climate suitability from the 1970s to the 2010s. At selected bellwether sites in Europe we found statistically significant trends in increasing climate suitability, as well as a substantial northward expansion in the modelled potential range. Recent geographical records in Italy and France appear to represent a mixture of established and ephemeral populations, which is consistent with reports of the seasonal range dynamics of C. capitata in Europe. To gauge the generality of our findings, we applied the same techniques to the climate suitability dynamics of Queensland Fruit Fly, Bactrocera tryoni in Australia. We found patterns of poleward expansion in the potential distribution of B. tryoni that reflect the patterns of observations. We also found statistically significant trends in suitability at marginal sites.


IPRRG Webinar #13: Sonia Baldi

Pest Risk Register and Integrated Risk Assessment Tool for ADAFSA

The Emirate of Abu Dhabi, which is one of the seven Emirates that compose the United Arab Emirates (UAE), accounts for 80% of the agricultural sector along the country comprising 24.000 farms. The agricultural sector is held by the Abu Dhabi Agriculture & Food Safety Authority (ADAFSA) which is the local authority in charge of agriculture, food safety, food security and biosecurity in the Emirate of Abu Dhabi. It aims to develop a sustainable agriculture and food sector and protect the health of animals and plants to enhance the biosecurity and achieve food security. In addition, the authority is responsible for preparing plans, programs and activities in the field of agriculture, food safety and food security.

ADAFSA adopts the integrated farm to fork ‘food chain’ approach as a means of ensuring coherence and integration of regulatory and non-regulatory risk management measures across the entire food chain.

ADAFSA’s Integrated Risk Management Framework, based on risk analysis, is an essential tool to provide a consistent approach for making decisions on any government intervention and action in response to animal, plant and human health related issues.

In this webinar session, engineer Sonia Baldi, who is a risk analyst in the Policies and Legislation Division (ADAFSA), will give more insights about the Integrated Risk management Framework and will talk about the Pest Risk Register, which is a tool for government and decision makers to prioritize resources against pests and diseases which threaten our main crops. She will also develop more the context of risk assessment in plant health and its role in the management of the most important pests and diseases in the Emirate of Abu Dhabi.


IPRRG Webinar #14: Emma Hudgins

New Perspectives in Urban Forest Invader Management

Urban trees are important nature-based solutions for future wellbeing and livability, but are at high risk of mortality from invasive insects and pathogens. To plan effective mitigation, managers must know which tree species in which communities will be at the greatest risk, as well as the highest-risk species. This presentation will cover four different projects relating to urban forest health in the face of species invasions. First, I will summarize an economic impact assessment on United States (US) street tree mortality due to invasive insects. This approach combined models of street tree populations in ∼30,000 communities, species-specific spread predictions for 57 invasive insect species, and estimates of tree death due to insect exposure for 48 host tree genera. We estimated that 1.4 million street trees will be killed by invasive insects from 2020 through 2050, costing an annualized average of US$ 30M. Further, 90% of all mortality will be due to emerald ash borer (Agrilus planipennis, EAB), which is expected to kill virtually all ash trees (Fraxinus spp.) in >6000 communities. Secondly, I will discuss a recent project that has reformulated this impact model as an optimal control framework to determine the ideal management strategy for urban tree persistence. We found that the best management strategy always included a combination of site-focused (biological control) and spread-focused (quarantine) management measures, and that failing to use a mixed strategy could result in losses of upwards of one million street trees in the next 30 years. Thirdly, I will discuss the link between forest biodiversity and pest susceptibility, where a phylogenetic model indicates that diverse tree plantings reduce the probability that invaders will establish. Finally, I will discuss preliminary findings from a very recent ‘new perspectives in forest invader management’ workshop, featuring experts across the invasion response, including Indigenous knowledge holders.