Research in other countries, particularly USA has identified various microbial antagonists of Botrytis which have been developed as biocontrol agents for use as post-harvest treatments.
- These are generally also active against Penicillium rot. Examples include Yield Plus (yeasts ex South Africa).
- These appear to be effective against wound fungi such as Botrytis and Penicillium, but not against orchard fungi, or Botrytis rot arising from latent infections of the calyx.
- Currently there are no commercially available biocontrol agents approved for use on apples.