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 cultivar of golden kiwifruit, 'Gold3', has been found to be more disease-resistant and most growers have now changed to this cultivar. 'Gold3', marketed by Zespri as is not quite as sweet as the previous 'Hort16A', with a hint of tanginess, and lacks the usually slightly pointed tip of 'Hort16A'. Kiwifruit can be grown in most temperate climates with adequate summer heat. Where fuzzy kiwifruit ("A. deliciosa") is not hardy, other species can be grown as substitutes. Often in commercial farming, different breeds are used for rootstock, fruit bearing plants and pollinators. Therefore, the seeds produced are crossbreeds of their parents.