Max Shepherd resigned as chairman on Thursday and was replaced by Dunedin accountant Stephen Higgs.
Michael Mellon and Tim Dunn also join John Forrest, the sole survivor of the original board.
Mr Higgs is a new appointment to the board, while fellow accountant Mr Dunn and the company's largest shareholder, Christchurch investor Mr Mellon, were recent appointees.
It was also announced yesterday that German investor Klaus Hartge has New Zealand Stock Exchange approval to take a 5% stake in the company and will be the second-largest shareholder.
It has been a troubling few months for the company which produces biological controls for the grape-wasting Botrytis cinerea fungus.
Fermentation problems halted production of its two products, Botry-Zen and Armour Zen, which coincided with a shareholder vote opposed to issuing convertible notes and options to raise $1.8 million.
A last-minute rescue package was negotiated, which saw Melic Innovators, former owner of Mosgiel food company Bush Road, lend Botry-Zen $500,000 and take a share subscription for 25 million ordinary 2c shares.
The BNZ also agreed to $1.2 million overdraft facility and Mr Hartge, who has a food ingredients business in Hamburg, has bought 10.372 million shares at 2c a share, worth $207,000.
Mr Higgs said he was still to be brought up to speed with the state of the company, but one of his first functions would be to find a new chief executive, following the resignation earlier this year of John Scandrett.
He said there was no pressure on Dr Shepherd to retire. Both he and John Gilks had decided it was the right time to leave, in Dr Shepherd's case after seven years on the board.
Mr Mellon, who owned 13% of the company prior before Mr Hartge took his stake, has been overseeing production issues and said the fermentation problems had been adjusted and production of Botry-Zen was back to 90% of budget.
Previously it was 20% of production.
Ingredients for the late-season fungus fighter armour zen were delivered and paid for this week and production would start on Monday.
"We are enjoying plenty of inquiry for product well before the season starts, which is quite healthy."
He was optimistic about the coming season and had spoken to wine growing leaders, telling them the business was back on track.
Mr Higgs is a founding partner at Dunedin accountancy firm Polson Higgs and is also an independent director and chairman of Central Otago wine company, Mt Difficulty Wines and one of two independent directors of Motor Trade Finance.
Botry-Zen shares were yesterday trading at 2c, up from 0.16c cents at the start of trading yesterday.
