Owner Johann Krige estimates 25% of production has been lost in a fire that swept down the Simonsberg Mountain, largely affecting their prized Pinotage grapes.
"Martin Johnson is one of the dirtiest captains in world rugby, " Krige told a South African newspaper on the eve of his side's departure for Australia.
Krige has been accused of playing dirty himself and came under fire after TV footage highlighted 11 cases of foul play from the Springbok skipper during last November's Test defeat against England at Twickenham.
In the second half, Krige was driven over after a catch-and-drive from a lineout, but the best try of the match came when Tevita Vaikona, Mark Bartholomeusz and Ben Johnston combined to set up Harris.