Crop diversity are all susceptible to a single fungus, "Fusarium oxysporum" (Panama disease); large areas of the crop were destroyed by the fungus in the 1950s. 'Gros Michel' has been replaced by the current main banana on the market, the 'Cavendish', which in turn is (2015) at risk of total loss to a strain of the same fungus, 'Tropical Race 4'. Such threats can be countered by strategies such as planting multi-line cultivars and cultivar mixes, in the hope that some of the cultivars will be resistant to any individual outbreak of disease. The implications of crop diversity are at both local
Canada–Panama Free Trade Agreement 99% of its tariffs on goods from Panama. Canada will keep tariffs on some imports of sugar, poultry, eggs and dairy products. Panama will end its ban on beef from Canada which was initiated after cases of mad cow disease were found in Canada in 2003. In 2008, bilateral merchandise trade between Canada and Panama totaled $149.1 million. Trade has increased by 48 percent from 2007. Canada made up $127.9 million of total trade between the two countries, while Panama made up the remaining $21.2 million. Both countries parliament needed to approve the agreement before it could come into force.