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Biovigilance on emerging and regulated pests : detection, epidemiological risks and control methods

The potato's vegetative propagation method, the intensification of trade, changes in climate and cultivation practices, and the reduction in the range of synthetic chemical products all increase the risk of introducing or spreading pathogenic organisms that are currently absent or only present to a limited extent in Europe.
 

Some of them pose a serious threat to potato crops because of the damage they can cause and the difficulties involved in eradicating them. They are classified by the European health authorities on the lists of Quarantine Pests (Plant Health Regulation 2016/2031), for which no tolerance is allowed, with compulsory monitoring and the implementation of appropriate control methods in the event of detection. The economic consequences for growers affected by the detection of a Quarantine Pest can be considerable, due to the damage caused and the strict outbreak management measures required. 


The parasites included in the programme are : 

  • the bacteria of the Ralstonia solanacearum complex (R. solanacearum, R. pseudosolanacearum and R. syzygii) and Clavibacter sepedonicus, responsible for brown rot and ring rot on potatoes respectively ; 

  • root-knot nematodes, Meloidogyne chitwoodi, M. fallax and M. enterolobii, and cyst nematodes, Globodera pallida and G. rostochiensis, species that are very damaging because they are difficult to eradicate due to their wide host range in the case of the former and their survival form, the cyst, in the case of the latter. Biovigilance is maintained for other Meloidogyne species likely to be introduced into the country or already sporadically present in Europe;

  • Candidatus Liberibacter solanacearum, a phloem bacterium transmitted by psyllids that causes Zebra Chip disease on potatoes in North America and New Zealand. Certain haplotypes, different from those responsible for Zebra Chip, have been detected in several European countries on Apiaceae and sporadically on potatoes (Spain, Finland); 

  • Phytoplasmas and pospiviroids that occur sporadically in Europe and have recently been detected in certain EU countries. Biovigilance is therefore maintained for these Regulated Non-Quarantine Organisms (RNQO), for which no tolerance is permitted.

The aim of this programme is therefore to maintain the health status of the region and its crops in relation to quarantine organisms and emerging parasites, in particular by stepping up biovigilance and prophylaxis initiatives and rethinking pest control strategies. 

The team

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Anne-Claire Le Roux

Programme manager

INRAE IGEPP
Le Rheu (35)

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Marie-Sophie Neveux

Research technician

INRAE IGEPP
Le Rheu (35)

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Laure Berton

Assistant engineer

INRAE IGEPP
Le Rheu (35)

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Pauline Dewaegeneire

Research engineer

In charge of experiments

Comité Nord
Achicourt (62)

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Bruno Massa Ngala

Research engineer

Comité Nord 
Achicourt (62)

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Florian Manceau

Research technician

Comité Nord
Achicourt (62)

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Peggy Colson

Technical assistant

Comité Nord
Achicourt (62)

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Aurélie Leclerc

Research technician

INRAE IGEPP
Le Rheu (35)

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Sarah Trempont

Assistant engineer

INRAE IGEPP
Le Rheu (35)

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Antinéa Sallen

PhD student

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Angers (49)

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