Kiwifruit banana. Once a kiwifruit is ripe, however, it is preserved optimally when stored far from other fruits, as it is very sensitive to the ethylene gas they may emit, thereby tending to over-ripen even in the refrigerator. If stored appropriately, ripe kiwifruit normally keep for about one to two weeks. "Pseudomonas syringae actinidiae" (PSA) was first identified in Japan in the 1980s. This bacterial strain has been controlled and managed successfully in orchards in Asia. In 1992, it was found in northern Italy. In 2007/2008, economic losses were observed, as a more virulent strain became more dominant (PSA V). In
Kiwifruit industry in New Zealand right to export their own kiwifruit varieties without using Zespri. However, in October 2011 the case was dropped in response to pressures from a new bacterial disease causing devastating losses in kiwifruit. In November 2010, plant symptoms were discovered that suggested that "Pseudomonas syringae" pv. "actinidiae" (PSA), a variant of the bacterium "Pseudomonas syringae", were present in a Bay of Plenty kiwifruit orchard in the North Island. Provisions of the Biosecurity Act 1993 have been used to limit its spread. These measures were continued in 2011, but were largely unsuccessful with most orchards in the Bay of Plenty displaying some