Natural enemies of crop pests in oilseed rape fields in relation to local plant diversity and landscape characteristics

R.F. Shaw, J.K. Pell, J.W. Redhead, J.M. Bullock & J.L. Osborne
The number and type of natural enemies of crop pests found in winter-sown oilseed rape fields (Brassica napus L.) in relation to local plant diversity (in crop and field margin) and landscape characteristics. Natural enemies and pests were collected using two methods (suction sampling and pitfall traps). Local plant diversity was assessed using quadrats in field margins and in cropped area. The presence of hedges was also recorded. Landscape characteristics include the amount of mass...
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