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Exponential outspread of Halyomorpha halys (Stal, 1855) (Hemiptera: Pentatomidae) in Portugal
Hugo Gaspar, Silvia Castro, Jose Manuel Grosso-Silva, Torsten van der Heyden, Joao Loureiro
Abstrac
The presence of the invasive species Halyomorpha halys (Stal, 1855) (Hemiptera: Pentatomidae),
the brown marmorated stink bug (BMSB), was first confirmed in Portugal in late 2018. In this
note, an update to the known distribution in the Portuguese territories, including the first
record in the Madeiran Archipelago, is presented. In Portugal, the BMSB has now been
detected 51 times more, including six new districts, with increasing records registered in the
last two years that envisage an exponential outspread in this territory. Also, the re-occurrence
of individuals in the same localities in past years and the detection of a high number of
individuals in some of them suggest that small stable populations may already exist, at least in
some regions.
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