IBEB-EU: No new emerging threat from Bremia lactucae in Europe in 2026

Bremia lactucae, the causal agent of downy mildew in lettuce, is genetically very variable and may develop new races that overcome host plant resistance in lettuce crops. Even within one lettuce production field, several races may be present. Monitoring the changes in the Bremia population is important for breeders and growers. The International Bremia Evaluation Board Europe (IBEB-EU) collected 381 Bremia isolates from lettuce between 2025 and early 2026 (up to April) in Europe. […]

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