There is considerable research in other countries on biological agents for control of fireblight. Four products are commercially available in the USA:
- Pseudomonas fluorescens strain A506 (Blight Ban)
- Pantoea agglomerans E325 (Bloomtime Biological FD)
- Bacillus subtilis strain QST 713 (Serenade Max)
- Bacillus pumilis strain QST 2808 (Sonata)
Currently these are not available for use on apple in the UK.
- Usually they are applied during bloom in conjunction with blight warnings and as part of an integrated programme.
- They are usually not reliable enough to be used alone.