A large study that lasted for thirteen years shows that biodiversity in the vineyard is a good thing that pays off. If a vineyard is surrounded by hedges, trees and shrubs, the number of pests (insects bad for the vines) decreases significantly, e.g. the dreaded grape worm (vers de la grappe).
The survey was conducted on 400 estates in Andalusia, Spain by the University of California, Davis. The properties with rich biodiversity used fewer insecticides and were less likely to suffer from reduced yield.
Read more: vitisphere