Fungicide Resistance Found in Oilseed Pathogen
Researchers have detected widespread resistance to common fungicides in populations of a key oilseed crop pathogen.
Updated on Oct. 10, 2026 in Diseases — General
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Scientists have identified resistance to SDHI fungicides in the pathogen Plenodomus biglobosus, which affects oilseed crops. This resistance was found across samples collected from the United Kingdom and Poland.
Why it matters
The development of fungicide resistance complicates disease control strategies for crops, potentially necessitating new management approaches. Understanding how pathogens evolve to survive standard treatments is critical for maintaining agricultural health and food security.
In a study screening isolates from the UK and Poland, 95% of UK samples and 6% of Polish samples showed resistance to SDHI fungicides. Some isolates demonstrated a 500-fold reduction in fungicide efficacy under laboratory testing.
The details
The resistance is tied to specific mutations in the genes that encode the fungal succinate dehydrogenase (SDH) enzyme, which is the target of SDHI fungicides. These genetic changes allow the pathogen to survive exposure to the chemicals, and researchers observed that these mutations do not appear to reduce the overall fitness of the fungus.
Timeline
October 10, 2026: Findings regarding fungicide resistance were published.
Health Landscape
This finding reflects a broader trend of escalating resistance in agricultural pathogens against standard chemical control methods. It highlights the shifting landscape of crop protection as evolving fungal populations adapt to long-standing fungicide protocols.
While this news pertains to agricultural pathogens rather than direct human health, it serves as a reminder of how quickly microbial populations adapt to chemical interventions. Consumers should remain aware that food safety and production rely on continuous, updated scientific monitoring of such resistance patterns.
The takeaway
The study confirms that the pathogen Plenodomus biglobosus has developed significant resistance to SDHI fungicides through genetic mutation. Tracking these resistance markers is essential for evaluating the long-term effectiveness of current agricultural disease control measures.
Further reading
For more on the challenges of managing evolving pathogens, visit our Diseases — General section.
Source note: This article includes information reported by Agriland.
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Is reliance on chemical fungicides a sustainable long-term strategy for managing major crop diseases?
