Root-lesion nematodes (RLN) are an important pest of broadacre crops. Yield loss is directly related to the population density at the time of sowing.
Species in broadacre cropping include Pratylenchus thornei, P. neglectus, and in WA only: P. quasitereoides (also known as P. teres).
The first step in managing RLN is to correctly identify the presence of nematodes. This is best done through a soil test that determines both the nematodes species and population density present within a paddock. A PreDicta-B test can be accessed via your local agronomist.
Management is via rotation with resistant crops and varieties. Use the latest Crop Variety Guides in each state to select varieties with high resistance/tolerance ratings to the particular species of nematodes in your soil.
The GRDC has produced detailed Root-lesion Nematode factsheets – one each for the Northern, Southern and Western regions. These provide a complete guide to testing for and managing RLN.