Agriculture Reference
In-Depth Information
Disease
Causal organism
Distribution
Varietal susceptibility
Symptoms
Sigatoka leaf spots
Black Sigatoka -
Black leaf streak
Mycosphaerella
fijiensis
Paracercospora
fijiensis
Worldwide, except
some islands in the
Caribbean and
subtropical areas
Cavendish and most
other commercial
varieties are susceptible.
Some resistance in
M. acuminata
and AA
diploids
Dark leaf spots on lower leaf surface,
which enlarge and coalesce, causes
signi
fi
cant reduction in leaf area and
yield, and premature fruit ripening
Mycosphaerella
musicola
Yellow Sigatoka
Worldwide, more
common higher
elevations cooler areas
Less serious than black
Sigotoka, plantains
(AAB) resistant.
Starts as pale yellow streaks on the upper
leaf surface, they enlarge and coalesce
Viral
Banana bunchy-
top virus
(BBTV)
Vector banana
aphid
South-east Asia,
Australia, India,
Central Africa, Paci
fi
c
Gros Michel AAA
susceptible, Cavendish
AAA susceptible, Saba
BBB tolerant
Infected leaves become stunted and
chlorotic at the margins. Bunching of
leaves at the apex. No fruit production,
suckers infected
