Abstract
Abstract BBTV is the most serious virus disease of bananas and plantains. It occurs in Africa, Asia, Australia and South Pacific islands. The virus is transmitted in a persistent, circulative, non-propagative manner by the banana aphid, Pentalonia nigronervosa, which has worldwide distribution. The virus is also spread through infected planting material. All banana cultivars are thought to be susceptible, with no known sources of resistance. The typical symptoms of bunchy top of banana are very distinctive and readily distinguished from those caused by other viruses of banana. Infected plants exhibit a rosetted or 'bunchy top' appearance. Once infected, plants do not recover. The disease is a major constraint to production in many areas where it occurs. Devastating epidemics occurred early in the twentieth century in Fiji and Australia. In the 1920s, the disease had a dramatic economic effect on the banana industry in parts of Australia (Dale, 1987). More recently, BBTV has been decimating the banana industry in Pakistan (Jones, 1994) and in sub-Saharan Africa, BBTV was the main contributor to a reduction in banana bunch production by up to 70-90% in disease affected areas (Kumar et al., 2015). BBTV is listed by ISSG as one of the world's 100 worst invasive alien species.
Published Version
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