With six confirmed outbreaks of ToBRFV in the UK since 2019, it is absolutely key that growers remain vigilant in their avoidance of this virus. It is also crucial to make preparations to identify, manage and eradicate it in case there is an outbreak.
AHDB recently commissioned Dave Kaye (ADAS-RSK) to examine the experience of three UK growers who faced an outbreak of ToBRFV on their sites. The goal was to explore the first-hand experience of growers and help us progress our understanding of the nature of the virus, including patterns of spread and symptoms. Learnings from their experiences has helped to build on current best practice recommendations, which you can read in the full report. Key points include:
ToBRFV avoidance
Regularly update biosecurity and hygiene protocols:
- Monitor the implementation of protocols with all your staff
- Ensure all staff and essential visitors strictly follow protocols on-site, e.g.
- Ensure appropriate use and disposal of PPE
- Disinfection of hands and machinery
Maintain close contact with seed suppliers:
- Ensure that seed complies with UK legislation designed to protect the industry against ToBRFV
- Ensure all seed is free of tobamoviruses
- Test young plants for ToBRFV before dispatch from the propagator
Case studies: Growers experiences of ToBRFV
Identification and management of ToBRFV
Ensure staff are trained to monitor and identify ToBRFV symptoms:
- Symptoms may not develop consistently, and infected crop could be asymptomatic
Help delay the onset of symptoms:
- Maintain high levels of plant vigour and avoid plant stress
- Plant health is a priority where infection is confirmed, but crops are asymptomatic
- Do not wait for PHSI statutory surveillance:
If you suspect an outbreak contact your local inspector or email info@apha.gov.uk or call 0300 1000 313 as soon as possible
Clean up and eradication of ToBRFV on sites
Carefully remove infected crop debris using one of the following methods:
- Incinerate on-site (with an exemption license)
- Dispose of via deep burial
- Put through a biodigester
- send to landfill
Other clean-up recommendations include:
- Vacuum production areas after sweeping, jet wash, disinfect, then fog
- Clean all equipment in the infected area before disinfecting
- Consider treating irrigation storage areas and water
- Use disinfectants demonstrated to be effective against ToBRFV at their maximum rates
- After disinfection, swab and test high-risk areas to confirm eradication
If you’d like to find out more about Dave’s review, further insights from these case studies will be presented at our upcoming webinar:
Protected vine crops industry highlights
24 March 2021, 11am – 2.30pm
Dave Kaye (ADAS) will present his recommendations on hygiene management practices in protected cropping to prevent pest and disease issues in your crop. Adrian Fox (Fera Science Ltd) will also discuss managing contact transmissible viruses in protected edible production systems and his latest work on the spread and detection of ToBRFV.
The webinar will be recorded and made available after the event. Book your place here.
AHDB