Ecology professor Christer Björkman says the larva from hell has the greatest chance of establishing itself in Sweden through imports of oak.
The larva from hell continues to create chaos in Denmark. The professor highlights the risk from tree transports from other countries.
Björkman explains that every imported tree can carry eggs with it. He points especially to oak as the most likely entry route into Sweden.
The statement comes amid the ongoing situation in the neighboring country.
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High levels of birch pollen are spreading northward in Sweden over the coming days. At the same time the risk of oak pollen is rising in the southern parts of the country, according to the Swedish Museum of Natural History.
The pine processionary caterpillar has taken over areas on Gotland and Öland. Residents report severe itching and rashes from the larvae.
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The Swedish Board of Agriculture reports more cases of European foulbrood in Kalmar County. The county board urges beekeepers to stay vigilant.
Scientists in southern Vermont have begun infecting thousands of young American elms with a lethal fungus in a bid to identify disease-resistant trees. The effort at a 28-acre site in Benson aims to create a more diverse and tolerant population of the species.
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Youths aged 17 to 25 gathered outside Borlänge to create better conditions for threatened wild bees. The effort took place in 30-degree heat at Trumslagargropen near Rommehedslägret.
Following SMHI's forest fire risk warnings issued Friday, multiple blazes broke out across Sweden on Saturday, May 2. Fires reported in Gothenburg area, Årjäng, Uppsala, and elsewhere, with rescue services deploying aircraft and helicopters amid high risks in Götaland, Svealand, and parts of Norrland.
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Residents in Björklinge have been disturbed for several months each year by rooks nesting in the trees. Uppsala Municipality is now responding to the complaints and will begin work on an action plan next week.