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Bactrocera dorsalis

Summary of the Express Pest Risk Analysis for Bactrocera dorsalis (Hendel)

PRA area: Poland

Describe the endangered area: orchards: apple, peach, plums.

Endangered area is limited to adjacent to susceptible crops

Main conlusions:

Bactrocera dorsalis (Oriental fruit fly) is a species of tephritid fruit fly, which larvae infect tropical fruits, but also some species cultivated in the temperate zones, including PRA area.

Mated female punctures the skin of mature fruit and deposit eggs below the skin of the host fruit. Larvae feed on the flesh of the fruit. Infected plants are perishable. Oriental fruit fly couses serious economic losses in cultivations (losses can be up to 100% of unprotected fruit). Traps (liquid bait), male suppression, pesticides are the most effective control techniques against Bactrocera dorsalis.

Fruits import from area of Bactrocera dorsalis occurence is the most likely way of pest entry. The pest impact in PRA area will be lower then on its native range, because pest needs high temperatures to develop (B. dorsalis will not develop at temperatures below 13°C). Additional, host plants are grown in fields in PRA area which also reduce the posibility of pest establishment. Potential losses may be in cultivations close to area of adults flight.

Pest monitoring and traps should be the basic phytosanitary measures. If those methods will be unsufficient other eraditation methods should be consider.

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


Beet curly top virus

Summary of the Express Pest Risk Analysis for Beet curly top virus

PRA area: Poland

Describe the endangered area:

Main conclusions

Beet curly top virus has broad host, including more then 300 dicotyledons species from 44 families, most of them occur in PRA area. Virus couses losses in crops, especially in economic significance plants (e.g: potato, tomato, sugar beet), which. have large cultivated area in the entire country.

So far BCTV has been detected in North America, where coused losses in quality and quantity of yields. In Europe is present only in Mediterranean region (Italy, Cyprus, Turkey). Virus needs vectors to spread. Two insects species are responsible for the transmission of BCTV. C. tenellus i C. opacipensis are common in the current area of virus distribution. The climate in Central and North  Europe reduce occurence of vectors and therefore expansion of BCTV. In couse of that and low posibility of mechanial transmission the likelihood of BCTV spread in PRA area is low. However climate changes can improve condtions for C. tenellus or C. opacipensis. In such a case, the cultivated (e.g potatoe, sugarbeet) and also non-cultivated plants would be endangered.

The protection against viruses is based on systematic monitoring of imported plant material. All infected plants and vectors (on plants/fruits) need to be remove and destroy. It will ensure adequate protection against virus development in PRA area.

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

 

Low

X

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

X

Moderate

 

Low

 

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