Induction of Resistance in Abaca (Musa textilis Nee) Against Fusarium Wilt (Fusarium oxysporum f sp. cubense) using Elicitors

Elizabeth P. Parac

Abstract


Different elicitors were tested in vitro and in vivo against Fusarium wilt for induction of systemic acquired resistance (SAR) in abaca. The study aimed to determine the efficacy of each elicitor for inducing SAR for the control of abaca wilt. The elicitors used such as irradiated chitosan (shrimp), non-irradiated chitosan (shrimp and crabs), Salicylic acid (SA), Silicon dioxide (SiO2), G-amino-butyric acid (GABA), and Benzothiadiazole (BTH Boost) have no antifungal property against the Foc. Both the Phosphonate and Benlate treatments have antifungal activity in vitro. Among the elicitors evaluated for SAR induction in vivo, the irradiated chitosan (shrimp), non-irradiated chitosan (shrimp), G-amino-butyric acid (GABA), Benzothiadiazole (BTH, Boost) applied at 1 week or 3 weeks interval consistently delayed the onset of the disease, lower percent infection, reduced leaf symptom index (LSI) and rhizome discoloration index (RDI) as compared to control plants. These effects were comparable to Phosphonate and Benlate-treated plants. The results showed the potential of these elicitors as promising inducers of resistance in abaca for Fusarium wilt control. The use of irradiated and non-irradiated chitosan (shrimp) to induce SAR in abaca is cost-effective and, thus, maybe used as an alternative to the use of fungicides in Fusarium wilt disease.

Keywords


Fusarium wilt; Fusarium oxysporum; systemic acquired resistance; elicitor

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References


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