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 the grain is safe for human consumption.
Crop assurance schemes require the entry of a mycotoxin risk assessment score on the combinable crops passport. This page provides information about the risk assessment process. Understanding risk requires knowledge of the cropping region, previous crop, cultivation approach, varietal disease resistance rating, T3 fungicide dose and rainfall levels during critical stages of crop development.
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.
- Read AHDB guidance on fusarium mycotoxins in cereals
- Follow best practice to minimise fusarium mycotoxins in cereals
- Use the publication (order a printed copy) or the online tool to assess risk of fusarium mycotoxins
- 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
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.
AHDB information should be read in conjunction with the UK Codes of Practice produced by the Food Standards Agency.
Managing mycotoxin risks
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).
Pre-flowering risk scores
Flowering to harvest risk scores