Hard winds and driving rain have hampered the battle against an annual mosquito invasion around the lower part of the Dalälven river in eastern Sweden.
A company run by biologist Jan Lundström, Nedab, has been granted permission to carry out a major pesticide operation in an area that has previously registered the highest concentration of mosquitoes in Europe.
But adverse weather conditions have hampered the firm's plans, with workers only managing to spray an area covering 1,000 hectares since Monday. Lundström had expected them to spray 600 hectares per day.
“It has gone incredibly slowly,” he told local newspaper Gefle Dagblad.
The slow pace of the project is a cause of major concern as the pesticide only has an effect on mosquito larvae at an early stage of their development.
