Nutritional/Physiological Disorders:Potassium Deficiency

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  • Symptoms first appear on mature leaves and petioles.
  • The most characteristic symptom is the inward marginal yellowing of older leaf followed by marginal necrosis(Image1,2).
  • Chlorosis progresses very rapidly and in a day or two the whole leaf turns yellow with downward curling(Image3,4).
  • Subsequently the leaf dries up, petiole breaks and the leaf dies prematurely.
  • In deficient plants, banana bunches are short, slim and deformed as a consequence of poor fruit filling caused by reduced photosynthesis and sugar transportation