Detecting ToBRFV early

tobrfv resistance mark
tobrfv resistance mark

ToBRFV symptoms – know the signs*


Early detection can help prevent or limit the spread of the ToBRFV virus. Symptoms develop 12-18 days after infection; even mild symptoms can contain high levels of ToBRFV.

Regular visual inspection

Look for smaller plants lacking growth and those showing thinner heads or yellowing at the top. These are the first signs of an infection.

Take samples regularly

(at least every two weeks):

  • Take leaf samples and/or sample drain water for ToBRFV.
  • When tested positive, directly increase hygiene protocols.

Click here for more best practices on what to do after a positive ToBRFV test.

Leaf symptoms


Distortion (bubbling) and fern leaf


Calyx symptoms


Distinct discoloration (browning) of the calyx veins or drying out and browning of the tip ends.


Fruit symptoms


Blotching, pale color and/or brown necrotic spots.

Source: European and Mediterranean Plant Protection Organization

*These recommendations should be considered as one reference point and should not be substituted for individual assessment of such industry guidelines and best practices, along with the professional opinion of relevant experts evaluating specific circumstances.

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