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In Canterbury, New Zealand, oilseed rape (Brassica napus L.) production can be constrained by soil-borne fungal diseases, viz., damping-off and root rot (Rhizoctonia solani) and stem-rot (5clerotinia sclerotiorum).The ability of a Trichoderma bio-inoculant (TBI) applied in a granule or as a seed-coating formulation to control these pathogens was investigated in two spring sown field experiments at Lincoln (high disease pressure) and Oxford (low disease pressure).