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So-called Morse Code symptoms (green colored "dots-and-dashes") form along banana leaf veins (Musa sp.) in response to infection by banana bunchy top virus.  Morse coding is one of the diagnostic symptoms of banana bunchy top disease.

So-called Morse Code symptoms (green colored "dots-and-dashes") form along banana leaf veins (Musa sp.) in response to infection by banana bunchy top virus.  Morse coding is one of the diagnostic symptoms of banana bunchy top disease. The symptom is most easily seen whem the leaf is held up to a backlighting source of light.

Definition

Morse code is a series of "dots and dashes" that form along leaf veins of diseased banana plants (banana bunhcy top disease, casued by the banana bunchy top virus, BBTV).