"The results show that, in the same two areas, sampled in the years 1989 and 2013, there was a dramatic fall in
the number of flying insects.
Using the same traps, in the same areas, significant reductions of insect populations, of more than 75%, were
found.
Our data confirms, that in the areas studied, less than 25% of the original number of flying insects collected in
1989, were still present in 2013.
Orboicher Bruch Area
The Orboicher Bruch, to the Northwest of Krefeld, is a designated Nature Reserve of around 100 hectares (220
acres). Due to the reserve’s relatively remote location and its rugged landscape, intensive farming came to the
area only recently."
To extrapolate from that to the world is a mistake. From what I believe is the original paper (copy at http://www.bouldercountybeekeepers.org/wp-content/uploads/20... ):
"The results show that, in the same two areas, sampled in the years 1989 and 2013, there was a dramatic fall in the number of flying insects.
Using the same traps, in the same areas, significant reductions of insect populations, of more than 75%, were found.
Our data confirms, that in the areas studied, less than 25% of the original number of flying insects collected in 1989, were still present in 2013.
Orboicher Bruch Area
The Orboicher Bruch, to the Northwest of Krefeld, is a designated Nature Reserve of around 100 hectares (220 acres). Due to the reserve’s relatively remote location and its rugged landscape, intensive farming came to the area only recently."