Banana Moko disease management with resistance inducers and chlorine dioxide
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Universidad Nacional de Colombia
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The plant disease Moko, caused byRalstonia solanacearum, isthe most important bacterial disease in banana and plantaincrops worldwide. In the present study, chlorine dioxide andseven resistance inducers in banana plants (Musasp.) infectedwith this bacterium were evaluated under greenhouse condi-tions. For the evaluation of chlorine dioxide, three doses wereused (10, 30 and 50 mg L-1). The evaluation of the resistanceinducers included the following: sodium salicylate 0.4 g L-1;hydrogen peroxide 1 mM; potassium phosphite 1.5 mL L-1;3-aminobutanoic acid 1.0 g L-1; methyl jasmonate 0.2 g L-1;acibenzolar-s-methyl 0.3 mL L-1and chitosan 3.0 mg mL-1. Theresults showed a significant reduction of 74% in the area underthe disease progress curve (AUDPC) value, which was calcu-lated for the disease development when the injected chlorinedioxide dose was 50 mg L-1. The AUDPC value for the resistanceinducers was reduced by 45.4% for chitosan, 75.5% for methyljasmonate and 65.5% for 3-aminobutanoic acid. Therefore, theresults indicated that these molecules have the potential to beused for control of the Moko disease.
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