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. 2022 Feb 8;20(2):e07077. doi: 10.2903/j.efsa.2022.7077
Number Risk mitigation measure Effect on the pest Evaluation and uncertainties
1 Separation and physical protection of the commodity during production and before export Yes

Physical separation of the bonsai plants may have an effect on reducing risk of infestation with Dendrolimus species, especially in the production base.

Uncertainties:
  • There is no information on whether plants are protected with the net in the storage and packaging place before export.
  • Precise timing of net protection period is not provided.
  • There is no information on how the nursery staff enters and exits the net protected area during the production cycle.
2 Growing medium and its treatment No Not applicable because the soaking is done when larvae are not present in the soil.
3 Treatment of seeds No Not applicable.
4 Insecticide and acaricide treatments Yes

Spray of contact and ingestion insecticides can be very effective in killing the larvae that are present on the plants.

Uncertainties:
  • There are no uncertainties.
5 Fungicide treatments No Not applicable.
6 Nematicide treatments No Not applicable.
7 Herbicide treatments and weed management No Not applicable.
8 Official inspections during production Yes

The sampling and laboratory inspection of plant material may allow to identify plants infested by Dendrolimus species.

Uncertainties:
  • There is no information about the prevalence of Dendrolimus infested plants in the nursery and surroundings.
  • Some larvae can go undetected because they are hidden in the upper part of the soil.
9 Official inspections and treatments before export Yes

The sampling and laboratory inspection of plant material may allow to identify plants infested by Dendrolimus species.

Export plants can be infested when they are moved from the bonsai production base to the storage and packaging place.

The removal of the soil and soaking will kill the larvae hidden in the soil. Whereas some larvae can remain on the foliage.

Uncertainties:
  • Whether small larvae can go undetected during the final inspection of foliage and twigs.