Canopy management in winter oilseed rape


Cereals & Oilseeds
Project code:
01 July 1995 - 30 June 1999
AHDB Horticulture
AHDB sector cost:
£217,197 from HGCA (project no. 1579)
Project leader:
G D LUNN1 , J H SPINK2 , D T STOKES3 , A WADE2 , R W CLARE2 and R K SCOTT1 (deceased) 1 Division of Agriculture and Horticulture, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire, LE12 5RD 2 ADAS Rosemaund, Preston Wynne, Herefordshire, HR2 3PG 3 Plumpton Agricultural College, Ditchling Road, Lewes, East Sussex, BN7 3AE



About this project


Many commercial oilseed rape crops, sown early, at high seed rate and with plentiful nitrogen fertilisation, have canopies that are too large. A series of experiments was conducted where canopy size was varied by sowing date (early or late September), seed rate (120 or 60 seeds m-2), nitrogen fertiliser (0 - 300 kg ha-1 N) and mowing. The dry matter and green area indices of leaf, stem and pod throughout development were determined by growth analysis and yield and yield components were measured. In 1998 and 1999, the potential for reducing pesticide and insecticide inputs to small canopies was assessed, with detailed records of pest and disease incidence and yield.