During the last growing season (2017/18) a European Union decision was taken to withdraw authorisations for plant protection products containing iprodione as an active constituent. You would know iprodione for its use as a late season Botrytis product for use in grapes (Rovral, Corvette, Ippon etc).
The latest information from the AWRI is that iprodione not be applied to wines targeted for export markets (published in their latest Dogbook), many wineries have now determined that products containing iprodione can no longer be applied to grapes destined for export.
It is not recommended to use iprodione unless you are only selling wine domestically.