Gestion des bioagresseurs
Cercosporiose noire du bananier

Can an improved nutrition with foliar applications of mineral nutrient better help banana plants to prevent black sigatoka (bs) and post-harvest disease (phd) development ?


Role of nutrition in plant-pathogen interactions

  • Excessive potassium in French West Indies banana crop soils ==> K accumulation is antagonistic to the assimilation of Mg, Ca or B.
  • Mineral nutrients = key factors for plant growth but also for plant-pathogen interactions
  • Variable responses of Mg in banana-pathogen interaction :

– Decreased severity of yellow sigatoka when banana plants deficient in K, N, P, S or Mg in controlled conditions
– Lower percentage of infection of BS in areas where banana leaves contained lower Mg, high N, P, K, Ca, B and Zn
– Reduction of BS symptoms at harvest with foliar fertilization but non significant at vegetative phase or flowering


Suggestion de documents