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Organization europeenne et mediterraneenne pour la protection des plantes


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EUROPEAN AND MEDITERRANEAN PLANT PROTECTION ORGANIZATION
ЕВРОПЕЙСКАЯ И СРЕДИЗЕМНОМОРСКАЯ ОРГАНИЗАЦИЯ ПО КАРАНТИНУ И ЗАЩИТЕ РАСТЕНИЙ
ORGANIZATION EUROPEENNE ET MEDITERRANEENNE POUR LA PROTECTION DES PLANTES
05/11889

WPPR point 12.2



Report of a Pest Risk Management: Strobilomyia viaria
This summary presents the conclusions of the pest risk management which has been conducted on the pest, according to EPPO Standard PP 5/4(1) Pest Risk Management Scheme.


Pest:

Strobilomyia viaria Huckett (Diptera: Anthomyidae)

Assessors:

EPPO Panel on Quarantine Pests for Forestry revised Panel on Phytosanitary Measures

Date:

2005-05-31



IDENTIFICATION OF THE PATHWAYS

1 Pathways studied in the pest risk management
Pathway: Soil accompanying larch plants (Plants of Larix accompanied by soil or other growing medium)

Pupae of the pest can be disseminated with soil of potted larch seedlings.


2 Other pathways

Adults of S. viaria can fly over rather long distances to colonize new stands, but the Panel did not consider this case because of a long distance between the actual area of distribution of the pest and the endangered area. It can nevertheless be noted that this pathway may present a risk.



IDENTIFICation of POSSIBLE measures for pathways
Pathway: Plants for planting of Larix accompanied by soil or other growing medium
Measures related to consignments:

The following measures have been identified:



  • Growing medium kept free from Strobilomyia viaria;

  • Plants shaken practically free from growing medium and replanted in 'pest-free' growing medium within 2 weeks before export.

Note these measures are described in the EPPO Phytosanitary Procedure No.54 Growing Plants in growing media prior to export.

  • Inspection for puparium.


Measures related to the crop or to places of production

Note this measures is described in the EPPO Phytosanitary Procedure No.54 Growing Plants in growing media prior to export.

  • Seedling of Larix should be grown either in specified protected conditions (to prevent soil contamination from falling larvae) or the seedling production should be separate from grown Larix plants ;


EVALUATION OF THE MEASURES IDENTIFIED IN RELATION TO THE RISKS PRESENTED BY THE PATHWAYS
CONCLUSION: SELECTION OF MEASURES


Plants for planting of Larix (except seedlings) accompanied by soil or other growing medium originating in countries where Strobilomyia viaria occurs1


PC and, if appropriate, RC
Area freedom for Strobilomyia viaria

or

Plants have been grown following EPPO Phytosanitary Procedure No.54 Growing Plants in growing media prior to export and plants should be free from fruits.




Seedlings of Larix accompanied by soil or other growing medium originating in countries where Strobilomyia viaria occurs


PC and, if appropriate, RC
Area freedom for Strobilomyia viaria

or

Plants have been grown following EPPO Phytosanitary Procedure No.54 Growing Plants in growing media prior to export



or

Planted in a growing medium free of Strobilomyia viaria following EPPO Phytosanitary Procedure No.54 Growing Plants in growing media prior to export and grown in specified protected conditions (isolation of the place of production from other Larix plants, or mechanical isolation)





Appendix

For each possible category of measures in the pest risk management scheme, this table could identify specifically the ones which were considered suitable ("possible" in bold) and the ones which were not suitable (with a brief justification)
The Panel should decide whether such a summary table is useful, and whether it belongs to the pest risk management, or to the report of the pest risk management


categories of MeasureS

Pathway n° 1

Detection of the pest in consignments by inspection or testing




visual inspection

yes

specified testing

no

import under special licence/permit and post-entry quarantine

no

Removal of the pest from the consignment by treatment or other phytosanitary procedures




specified treatment

no

removal of parts of plants from the consignment

Plants shaken practically free from growing medium and replanted in 'pest-free' growing medium within 2 weeks before export

Prevention of establishment by limiting the use of the consignment




import under special licence/permit and specified restrictions

no

Prevention of infestation of the commodity




specified treatment and/or period of treatment (crop)

Growing medium at planting was free from Strobilomyia viaria and kept free from S. viaria

consignment should be composed of specified cultivars

not suitable

specified protected cultivation

yes

specified age of plant, growth stage or time of year of harvest

no

specific handling/packing methods

not relevant

certification scheme

no

Establishment and maintenance of pest freedom of a crop, place of production or area




pest freedom of the crop

no

pest-free place of production

no

pest-free place of production and appropriate buffer zone

no

pest-free area

yes

Prohibition

no

Internal measures




surveillance and/or eradication campaign

no



1 Some countries require that deciduous plants for planting from certain origins should be dormant and free from leaves and plant debris. Such requirements are recommended as a general measure.




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