Andryani, Yerni (2026) Potential of Streptomyces sp. from Rhizosphere of Mangrove Avicennia marina as a Biological Agent of Sclerotium rolfsii Causing Plant Southern Stem Blight on Bird’s Eye Chili (Capsicum frutescens L.). Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Bird’s eye chili (Capsicum frutescens L.) is an important horticultural commodity classified under the nine staple foods of the Indonesian population; however, its productivity frequently declines due to pathogenic fungal attacks. Sclerotium rolfsii is a soil-borne pathogen responsible for stem rot disease in chili plants, which can cause yield losses ranging from 80% to 100%. Information regarding the efficacy of Streptomyces sp. isolated from the rhizosphere of the mangrove Avicennia marina against S. rolfsii on bird's eye chili via root dipping treatment remains limited. Therefore, this study explored the potential of Streptomyces sp. from the A. marina mangrove rhizosphere as a biocontrol agent to control S. rolfsii. The study employed a non-factorial Completely Randomized Design (CRD), comprising a control group and root dipping treatments in a Streptomyces sp. suspension for varying durations (15, 30, and 45 minutes). The observational data were analyzed using ANOVA at a 5% significance level using IBM SPSS Statistics software version 27. The results indicated that Streptomyces sp. was capable of inhibiting the growth of S. rolfsii in vitro by up to 52.22%, which is classified as strong inhibition. Meanwhile, in vivo test results demonstrated that the 45-minute root dipping treatment (SW3) prolonged the incubation period until the final day of observation, showed no disease symptoms until the end of the observation period, and enhanced the vegetative growth of the plants. Keywords: Streptomyces sp.; Sclerotium rolfsii; biocontrol agent; antagonist
| Item Type: | Thesis (Undergraduate) | ||||||||||||
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| Subjects: | S Agriculture > SB Plant culture > SB950-989 Pest Control and Treatment of Diseases, Plant Protection S Agriculture > S Agriculture (General) |
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| Divisions: | Faculty of Agriculture > Departement of Agritechnology | ||||||||||||
| Depositing User: | Yerni Andryani Andryani | ||||||||||||
| Date Deposited: | 03 Jun 2026 04:19 | ||||||||||||
| Last Modified: | 03 Jun 2026 04:19 | ||||||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/53569 |
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