Resistance of barley, durum and bread wheat varieties to the root lesion nematode Pratylenchus thornei – Mungindi 2011

Abstract

Key findings • Winter crop type and variety choice has a large effect on nematode populations in the soil due to differences in their resistance to Pt. • This was most pronounced in bread wheat where variety choice decreased the Pt population by 64% between the most susceptible (25,448 Pt/kg soil) and most resistant (9,050 Pt/kg soil) variety. • The build-up of Pt populations in this field trial are broadly in line with published resistance ratings but discrepancies appear to exist, especially with LongReach Spitfire[PBR] which appears better than its current very susceptible (VS) rating. • Reliable resistance ratings appear to be produced under both high and moderate starting Pt populations. Hence, NVT are potentially a useful source of reliable field based assessments.