Butterflies are highly mobile, ranging over wide areas and can settle for a while colder regions (north Canada, south Argentina). Considering climatic conditions in PRA area, it is unlikely that pest will be able to have a permanent populations. PRA area will be endangered in case of occurence of numerous H. zea populations in south Europe (similar situation is with related species Helicoverpa armigera)
There is a risk of crop losses in protected conditions in case of pest occurrence in PRA area.
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