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Risk assessment for fusarium mycotoxins in wheat

Assess the risk of fusarium mycotoxins and record the score on the grain passport.

What are mycotoxins?

Some fungal species can grow on crops and foodstuffs and produce toxic chemicals. Of widely varying toxicity to humans and animals, these chemicals are called mycotoxins. In cereals, mycotoxins can result from fungi that either develop from field-borne infections (fusarium mycotoxins and ergot alkaloids) or in stored crops (ochratoxin A).

Fusarium mycotoxins

There are five fusarium species and two microdochium species that infect cereals and may cause ear or head blight. In the UK, the main mycotoxin-producing species are F. culmorum, F. graminearum and F. avenaceum. Microdochium species do not produce mycotoxins. Information on symptoms, life cycle, importance, risk factors and management of the pathogens that can cause ear or head blight can be found in the cereal disease encyclopaedia.

Legal limits

There are legal limits for fusarium mycotoxins deoxynivalenol (DON) and zearalenone (ZON) in wheat intended for human consumption and guidance limits for feed grain.

The owner (farmer, merchant or processor) is legally obliged to ensure grain is safe for human consumption. Depending on end use, processors may require a lower limit at intake than the legal limit for unprocessed cereals to ensure finished products conform to legal limits.

The mycotoxin risk assessment

Paper version Excel version Order a printed copy
Fusarium and microdochium in cereals

Fusarium and microdochium in cereals

Find out more about fusarium species and microdochium species

Action points

  • Follow best practice to minimise fusarium mycotoxins in cereals
  • Assess risk pre-flowering and consider T3 fungicide (ear spray)
  • Take accurate measurements of rainfall at flowering and pre-harvest
  • Calculate final risk score at harvest and record on grain passport
  • Check purchaser requirements to determine whether mycotoxin testing is required

Mycotoxin rainfall risk tool

Rainfall-related mycotoxin risk assessment scores can now be calculated automatically with this tool.

Covering thousands of sites across England and Scotland, the map-based tool also shows how much rain has fallen during the critical winter wheat flowering and pre-harvest periods.

Find out more

Further information

The following resources will help you assess and manage mycotoxin risk. They will also help you to obtain composite and representative samples for testing for DON and ZON (where required by the end-user).

Combinable Crops Passport UK Codes of Practice produced by the Food Standards Agency

Contaminants monitoring

A robust foundation to instil confidence

A robust foundation to instil confidence

An article from Crop Production Magazine

Agrochemical residues, mycotoxins and other major contaminants in cereals and co-products have been monitored independently since mid-1980s. Find out about our research that aims to help ensure the safety of the UK grain and its end-products.

Monitoring of contaminants in UK cereals used for processing food and animal feed