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Liriomyza huidobrensis

Summary of the Express Pest Risk Analysis for Liriomyza huidobrensis Blanchard, 1926

PRA area: Poland

Describe the endangered area: greenhouse crops: ornamental plants, cucumber, lettuce;  field crops: sugar beet, potato, vegetables, ornamental plants

Main conclusions

Liriomyza huidobrensis is a polyphagous species.Most of its host plants are commonly cultivated in PRA area. Hosts of this leaf miner include lettuce, cucumber, onion and many ornamental plants, (especially cultivated in greenhouses). Insect is potato, sugar beet, vegetables, ornamental plants pest in field crops .

Pest is native to Central and Eastern Europe but it presents also in Mediterranean region.

Considering climate changes scenarios for PRA area that is unlikely that pest will be able to survive winter in open field crops. However many experts suggest that likelihood of survive may increase due to climate changes (especially shorter and milder winter).

Correct identification and monitoring are crucial to reduce the pest spread.

Yellow sticky papers are efficient method used to trap out pests, especially in place of production and packaging workshops.

Additionally, the morphological similarity of L. huidobrensis to other pest species (of Agromyzidae family) can cause numerous misidentifications.

Visual controls of consigments may be insufficient, becouse of occurence of all pest life stages at the same time.

Rating of the likelihood of impact without use of phytosanitary measures: High

Ornamental plants, seedlings, vegetables are imported from areas of pest occurence

PRA experts suggest to clasify L. huidobrensis as quarantine officially regulated pest. L. huidobrensis spread may be limited by creation of protected zones in pest free areas.

In addition, legal regulation of host plants (and potential host plans) import should be actualized.

Spraying insecticide is commonly used as sufficient phytosanitary measure.

Phytosanitary risk for the endangered area

(Individual ratings for likelihood of entry and establishment, and for magnitude of spread and impact are provided in thedocument)

High

 

Moderate

X

Low

 

Level of uncertainty of assessment

(see Q 18 for the justification of the rating. Individual ratings of uncertainty of entry, establishment, spread and impact are provided in the document)

High

 

Moderate

 

Low

X

Other recommendations:


Longidorus diadecturus

Summary of the Express Pest Risk Analysis for Longidorus diadecturus Eveleigh i Allen, 1982

PRA area: Poland

Describe the endangered area: peach orchards –south and west Poland;. other fruits crops like: blueberries should be also considerd.

Main conclusions

Longidorus diadecturus Eveleigh i Allen, 1982 is a peach pest and vector of Peach rosette mosaic virus (PRMV). Despite lack of data from the literature, this nematode is possibly  polyphagous like other Longidorus species. L. diadecturus occurs in USA and Canada. In case of similar climate condtions in PRA area there is high posibility that pest may appear and survie in Poland. The most likely way of entry is transport/import of infected soil or substrat in which host plants are cultivated.

Rating of the likelihood of entry: low

Rating of the likelihood of establishment outdoors and in protected conditions: moderate

Rating of the likelihood of spread: moderate

Rating of the likelihood of impact without phytosanitary measures: moderate

There is lack of data and information to overall pottential risk assessment

Phytosanitary risk for the endangered area

(Individual ratings for likelihood of entry and establishment, and for magnitude of spread and impact are provided in thedocument)

High

Level of uncertainty of assessment

(see Q 18 for the justification of the rating. Individual ratings of uncertainty of entry, establishment, spread and impact are provided in the document)

High

Other recommendations:

- regular inspection of susceptible crops/areas

- more researches - probability of pest survival and new hosts in PRA area