332 Ecological Restoration and Design
Winder L 1990. Predation of the cereal aphid Sitobion avenae by polyphagous predators on the ground.
Ecological Entomology 15: 105–110
Winder L, Carter N and Wratten S D 1988. Assessing the cereal aphid control potential of ground
beetles with a simulation model. Proceedings Brighton Crop Protection Conference – Pests and Dis-
eases 3, 1155–1160
Wolfe M S 2000. Crop strength through diversity. Nature 406: 681–682
Wratten S D, Bowie M H, Hickman J M, Evans A M and Sedcole J R 2001. Field boundaries as bar-
riers to the movement of hoverflies (Diptera: Syrphidae) in cultivated land. Oecologia (in press)