The Effect of Various Concentrations of Antagonistic Rhizobacteria on Germination and Seedling Vigor of Colletotrichum-Infected Chilli Seeds
DOI:
https://doi.org/10.35791/jat.v7i2.67632Keywords:
chilli seeds, antagonistic bacteria, Colletotrichum sp, viability, vigourAbstract
Red chili pepper (Capsicum annuum L.) is an important horticultura commodity in Indonesia. However, chili production is often constrained by anthracnose disease caused by Colletotrichum sp., which can infect seeds and reduce seed viability and vigor. The use of antagonistic rhizobacteria from chili rhizosphere is considered a potential biological control method to suppress pathogen infection and improve seed quality. This study aimed to determine the effect of different concentrations of antagonistic rhizobacteria on the viability and vigor of chili seeds infected with Colletotrichum sp. The experiment used a non-factorial completely randomized design consisting of five treatment level (control, 10⁶, 10⁸, 10¹⁰, and 10¹² cfu/ml). The results showed that treatment with antagonistic rhizobacteria had a positive effect in suppressing Colletotrichum sp. infection and improving seed performance. The treatment with a concentration of 10¹² cfu/ml was able to minimize disease incidence to 15.00%, increasing maximum growth potential to 99.00%, increased germination percentage to 94.00%, vigor index to 89.00%, and germination uniformity to 94.00%. The highest growth rate was obtained in the 10⁶ cfu/ml treatment, reaching 14.05%. These findings confirm that antagonistic rhizobacteria are effective as environmentally friendly biocontrol agents for improving the viability and vigor of chili seeds infected with Colletotrichum sp.
Keywords: chilli seeds, antagonistic bacteria, Colletotrichum sp., viability, vigour, biological control
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