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Regulated Pests: Understanding, Monitoring, and Managing the Threats

by Spyridoula Dimitropoulou | Research Associate | AUA

Regulated pests are harmful organisms—such as certain insects, pathogens, and weeds—that are subject to official control measures to prevent their introduction and spread. Effective regulation and management of these pests are essential for maintaining plant health and ensuring agricultural integrity. These regulatory measures are vital for protecting the European Union (EU) and its plants from invasive pests and diseases, promoting safe trade, and addressing the impacts of climate change. They contribute to enhanced protection of landscapes, forests, and green spaces, reduce the need for pesticides, and offer simpler and more transparent documentation for growers and farmers. They additionally provide crucial financial support for pest surveillance, eradication, and containment efforts. Here’s a closer look at the importance of these regulations and the framework for managing regulated pests.

Why are these pests Regulated? 

The regulation of pests is primarily driven by the need to protect agriculture, forestry, and natural ecosystems from severe economic and ecological damage. Here’s why these measures are so important:

  1. Preventing Economic Damage: Regulated pests can cause significant economic damage to agriculture, forestry, and ecosystems. By imposing regulations, authorities aim to minimize potential losses in crop yields and the costs associated with pest management and control measures.
  2. Protecting Biodiversity: Invasive pests can disrupt local ecosystems and threaten native species. Regulating these pests helps to preserve biodiversity by preventing their introduction and spread, thereby maintaining ecological balance.
  3. Early Detection and Rapid Response: Effective regulation involves monitoring for early signs of pest presence. This proactive approach allows for prompt intervention to control or eradicate them before they establish and spread, which is far more cost-effective than addressing large-scale outbreaks.
  4. Simplifying Trade: The regulation establishes a system, including plant passports and phytosanitary certificates, to manage the introduction and movement within the EU of plants and plant products and other material likely to be infected by harmful organisms (such as soil or other growing media) and to pose an unacceptable phytosanitary risk. This ensures easier control, traceability, and better protection for crops.
  5. Safeguarding Trade: By regulating pests, EU countries are protected from potential introductions of harmful organisms through trade, adhering to international standards set by the International Plant Protection Convention (IPPC). By enforcing phytosanitary measures, countries can effectively prevent pests from being introduced through plants, plant products, or other materials from outside the EU, based on thorough risk assessments and preventive strategies.

Which are the categories of Regulated Pests?

The EU’s framework for pest regulation, outlined in Regulation (EU) 2016/2031, categorizes pests based on their risk and required control measures. Here’s a breakdown of these categories:

  1. Union Quarantine Pests (QP): These pests are either absent from the EU or restricted to limited areas. Due to their serious threat to plant health, they are subject to eradication efforts, and their introduction and spread within the EU are strictly prohibited.
  2. Priority Pests: Designated under Delegated Regulation (EU) 2019/1702, these pests are prioritized due to their significant potential impact on the economy, environment, and agriculture. The EU must implement specific, urgent measures to manage these pests.
  3. Protected Zone Quarantine Pests (PZQP): These pests are present in certain EU regions but are absent from designated protected zones. Special measures are enforced to prevent their spread into these regions, ensuring the zones remain pest-free.
  4. Regulated Non-Quarantine Pests (RNQP): These pests are present in the EU but do not pose a threat to healthy plants. However, they can affect plant quality and agricultural production, so their presence is tolerated under controlled conditions.

Understanding these categories and their importance helps highlight the critical role of pest regulation in maintaining the health of our plants, protecting biodiversity, and ensuring the stability of trade and agriculture.

What are the challenges in monitoring QPs and RNQPs?

The EU’s regulatory framework for plant health emphasizes prevention, early detection, and rapid response to pest outbreaks. Member states are crucial in implementing these regulations, ensuring that both agricultural and natural ecosystems within the EU are protected from the threats posed by plant pests.

However, several key challenges impact the effectiveness of monitoring and enforcement:

  1. Data Collection Challenges: Gathering accurate and comprehensive data on these pests is often challenging due to the regulatory constraints and limited monitoring systems. This lack of data can hinder effective pest management and response strategies.
  2. Complexity of Pest Management Regulations: The overlap between plant health regulations creates confusion among stakeholders. This complexity can lead to misunderstandings about compliance requirements, making effective monitoring more challenging.
  3. Technological Limitations: While advancements in remote sensing and artificial intelligence offer promising tools for pest monitoring, the integration of these technologies into existing systems remains a challenge. Many operators may lack access to or familiarity with these advanced monitoring techniques, limiting their effectiveness.
  4. Resource Allocation: Effective monitoring requires significant resources, including time, personnel, and financial investment. Many competent authorities struggle to allocate sufficient resources, which can lead to gaps in monitoring and surveillance efforts and increased risk of pest outbreaks.
  5. Public Awareness and Engagement: Ensuring that the public is aware of and engaged in reporting potential occurrences of regulated pests can be challenging. Effective public engagement is necessary for comprehensive surveillance but often difficult to achieve.

How STELLA addresses these challenges:

STELLA will develop the STELLA Pest Surveillance System (PSS) consisting of three (3) subsystems: 1) an early warning system using novel pest forecasting models and Internet of Things (IoT) sensors, 2) a pest detection system using remotely piloted aerial systems (RPAS), remote and proximal sensing as well as citizen science and traps, and 3) a pest response system providing geolocated hotspots for initiating containment and counteractive measures. Given the limited current research on quarantine and regulated pests, this effort will involve exploring cutting-edge solutions and evaluating their effectiveness. By combining the results from these advanced technologies, we aim to develop innovative monitoring and detection tools specifically for regulated pests.

During a comprehensive four-year testing period with six strategically designed Use Case Pilots (UCPs) covering a variety of agricultural environments including arable, orchard, and vineyard crops, as well as large, difficult-to-reach areas like forests, will be deployed. STELLA focuses on eight (8) different RNQP and quarantine diseases (Verticillium dahliae, Pseudomonas savastanoi pv. savastanoi, Ceratocystis platani, Ralstonia solanacearum, Potato leafroll virus (PLRV), Grapevine leafroll-associated viruses (GLRAV1 & GLRAV3), Candidatus Phytoplasma solani, and Neofabraea alba) transmitted in a variety of ways (airborne, soilborne, insect vector), that expand across 4 European countries with different climate and geological characteristics and New Zealand.

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