Macquarie says it will block a takeover offer from Roc Partners for Costa Group berry and citrus orchard landlord Vitalharvest - should there be a unitholder vote - after lifting its already leading stake in the trust to 20.9 per cent from 16.2 per cent.

At the same time, Macquarie’s real estate arm on Thursday raised its takeover offer for the tenth time to $1.33 per unit, or alternatively $357.35 million, to acquire the trust’s assets to match a ninth offer made by Roc earlier this week.