1. How to pinpoint regional hotspots for pesticide load on bees
How to pinpoint regional hotspots for pesticide load on bees? GeoFARMatics2010 International Conference Cologne Nov 2010
Jens Erik Ørum, Institute of Food and Resource Economics
Søren Navntoft, Department of Agriculture and Ecology
University of Copenhagen

2. Bees, insects and other arthropods
Bees, and other insects and arthropods are important for environment, biodiversity, and human health and wealth
Some are pests – others are beneficial for agriculture
More bees and wild pollinators would be beneficial for agriculture
We use, however, a lot of pesticides to control the pests, eventually killing bees and other beneficial insects and arthropods

3. Pesticide load on bees When – Where – What and How?
It matters to the bees ,insects and arthropods, when, where and how often the fields are sprayed
Also the type of pesticides and the spraying method matters
Thus, some crops will cause a higher pesticide load to bees etc. than others
Bees and many insects and arthropods are, however, very mobile and may be exposed to pesticides in more than just one crop

4. Efficient means to reduced the loading
Thus, in our search for efficient precision farming techniques, IPM methods and regulation, ...
to reduce the pesticide load on bees and other mobile insects and arthropods, ...
We must not forget the where parameter.
The “where parameter” has been investigated and mapped in a Danish survey based on
CAP GIS data (2003)
Danish EPA pesticide statistics (2007)
Footprint (2009) acute 48h LD50 values for bees
Regional hotspots has been pinpointed

5. Regional hotspots for pesticide load on bees Acc
Regional hotspots for pesticide load on bees Acc. 48h acute LD50 values for bees (10 x 10 km2)
Red cells have a 3-4 time higher loading than the average cells

6. Conclusion
Bees and other mobile insects and arthropods are exposed to pesticides in more than just one crop
In our search for efficient means to reduce pesticide load on these insects and anthropoids we have to take the regional aspect into account
Geo information from CAP in combination with Footprint database, and national pesticide statistics may be an efficient tool to analyse the regional pesticide load and to pinpoint regional hotspots

7. Conclusion Than you for listening!
Bees and other mobile insects and arthropods are exposed to pesticides in many crops
In our search for efficient means to reduce pesticide load on these insects and anthropoids we have to take the regional perspective into account
Geo information from CAP in combination with Footprint database, and national pesticide statistics may be an efficient tool to analyse the regional pesticide load and to pinpoint regional hotspots
Than you for listening!