Tolerance of commercial cultivars and breeders' lines of wheat to Heterodera avenae Woll

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Abstract
Many commercial cultivars and breeders' lines of wheat were ranked for tolerance to cereal eelworm by comparing their yield of grain on a site heavily infested with Heterodeva avenae with their average yield on five other areas of South Australia. Different methods for assessing tolerance were examined. A range from tolerance to intolerance was obtained, but most commercial cultivars were intolerant. Many breeders' lines were highly tolerant. A visual system for rating early growth was strongly correlated with final yield. Resistance and tolerance were not related.