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News announcement11 October 2019

Plant Health: prioritising the fight against 20 quarantine plant pests on the EU territory

Japanese beetle is on the list of 20 quarantine plant pests on the EU territory published today.
Japanese beetle is on the list of 20 quarantine plant pests on the EU territory published today.
© Philip Steury, AdobeStock

Following a new methodology, the JRC assessed a list of quarantine pests for their potential economic, social and environmental impact on EU agriculture and forestry.

The bacterium Xylella fastidiosa affecting olive trees, almond, grapevine among other important crops, as well as the Japanese beetle, Citrus Black Spot, Citrus greening and the Asian long-horned beetle are among the top ranking pests affecting plant health in Europe.

This ranking has helped the Commission to list 20 quarantine pests as priority pests. The list is published today.

In the last years outbreaks of several plant pests new to the Union territory have been damaging the European crops and trees.

For example, the bacterium Xylella fastidiosa has been killing centenary olive trees in South of Italy, and the rising populations of the Japanese beetle (Popillia japonica) have been causing an important damage in the fruit tree orchards.

Globalisation of travel and trade as well as climate change are among the main drivers of emerging plant health risks.

Tibor Navracsics, Commissioner for Education, Culture, Youth and Sport, responsible for the Joint Research Centre, said: "To effectively protect our plants and our citizens’ quality of life, we first need to capture the harmful impact of pests like the Japanese beetle or the citrus black spot on our economy, environment and society. Thanks to a new indicator designed by the Joint Research Centre, we can now estimate the harm caused by these pests across several dimensions, including less tangible ones, such as landscape and cultural heritage or biodiversity and ecosystems. This has enabled us to identify the 20 worst offenders we should focus our efforts on."

Working in close collaboration with the European Food Safety Authority (EFSA), the JRC experts calculated potential impact of 28 quarantine plant pests such as insects, bacteria, nematodes and fungi.

On that basis, the European Commission has adopted under the new Plant Health Law a delegated act listing 20 pests as priority pests.

The inclusion of these pests in the EU priority pest list means obligations for member states regarding information campaigns, enhanced surveys, contingency plans, simulation plans and action plans for eradication.

Emilio Rodriguez Cerezo, deputy head of Economics of Agriculture unit in the JRC, and a co-author of the recently published JRC report, explains: "In general, the new methodology helps the Member States and responsible authorities to take decisions on how to best allocate their resources based on soundest scientific evidence available. We have designed a methodology to support policy makers and risk managers in ranking quarantine pests. Thanks to it we can now estimate the potential impact of quarantine pests on the economic, social and environmental domains. This tool integrates into a single indicator the estimations of production losses, impacts on trade, on employment and other socioeconomic indicators. But also we have created indicators for less tangible dimensions, such as impacts on recreation, landscape and cultural heritage and on biodiversity and ecosystem services."

The new methodology shows for example that the bacterium Xylella fastidiosa, the pest with the highest impacts on agricultural crops, including fruit, has the potential of causing annual production losses of 5.5 billion euros, affecting 70% of the EU production value of older olive trees (over 30 years old), and 35% value of younger ones; 11% of citrus; 13% of almond and between 1-2% of grape production in a scenario of full spread across the entire EU.

This would put at risk nearly 300 000 jobs across Europe currently involved in that production.

In addition to direct impacts on production, pests have significant indirect effects on upstream or downstream economic sectors.

For example, full spread of the Asian long-horned beetle (Anoplophora glabripennis) could result in the direct loss of over 5% of the overall growing stock of several EU forestry tree species, such as alder, ash, beech, birch, elm, hornbeam, maple, plane tree, poplar, prunus, rowan tree or willow, valued at 24 billion euros, a loss that could imply an economic impact in the upstream forestry sector of 50 billion euros.

Impacts in the cultural and food heritage can also be high.

The Japanese beetle could cause losses on more than 80 products protected by EU quality labels.

As an example of environmental impacts indicator, the citrus long-horned beetle (Anoplophora chinensis) ranked first in terms of the potential number of plant species currently grown in the EU streets and parks that could be affected.


Article 6(2) of Regulation (EU) 2016/2031 of the European Parliament and the Council on protective measures against pests of plants empowers the Commission to adopt delegated acts supplementing that regulation by establishing a list of the priority pests.

The delegated act was adopted by the Commission on 1 August 2019. A two month scrutiny period then followed during which neither Council nor Parliament raised objections.

Therefore the Regulation is now published and can enter into force.

Related Content

Commission press release

New EU plant health rules

JRC report: The Impact Indicator for Priority Pests



Publication date
11 October 2019