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Black sigatoka is a leaf-spot disease of banana plants caused by the ascomycete fungus Mycosphaerella fijiensis (Morelet), also known as black leaf streak. It was discovered in 1963 and named for its similarities with yellow Sigatoka, which is caused by Mycosphaerella musicola (Mulder), which was itself named after the Sigatoka Valley in Fiji .
"Segmented Banana" Chilling injury to fruit One of the less common plantain diseases is exostentialis clittellus referred to by most plantain and banana farmers as "segmented banana". This is a result of the peel forming tiny inter-fruit membranes which cause the banana to appear as though it has been sliced before it is peeled.
Mycosphaerella musicola was first reported from Java in 1902 and by 1962 was found in most banana growing regions of the world. Although it is spread over short distances by conidia and ascospores, over long distances it is the movement of infected germplasm such as diseased leaves and suckers that is likely to be responsible.
In plants affected by Fusarium, yellowing and wilting of the leaves typically progresses from the older to the younger leaves. [22] The wilted leaves may also snap at the petiole and hang down the pseudostem. In plants affected by Xanthomonas, the wilting can begin with any leaf and the infected leaves tend to snap along the leaf blade.
Banana freckle is easily propagated and spread from plant to plant by rain splash and movement of infected tissue or fruit. Management of the disease consists of cutting out infected leaves, using the paper bag method, fungicide application, and proper sanitation techniques it can be stopped by applying vegeta to it .
The Fix: If the leaves are falling over because of root rot or the plant is root-bound, repotting it is the best solution. "Snake plants should be repotted every three or four years," says Langelo.
Banana Xanthomonas Wilt (BXW), or banana bacterial wilt (BBW) or enset wilt is a bacterial disease caused by Xanthomonas vasicola pv. musacearum. [1] After being originally identified on a close relative of banana , Ensete ventricosum , in Ethiopia in the 1960s, [ 2 ] BXW emanated in Uganda in 2001 affecting all types of banana cultivars .
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