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Manalu, Jean Nihana
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Agriculture, Biological Sciences & Forestry

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Eksplorasi dan Karakteristik Bakteri Endofit Asal Tanaman Handeuleum (Graptophyllum pictum (L) Griff) Manalu, Jean Nihana; Mariana, Maya
JURNAL AGROPLASMA Vol 10, No 1 (2023): JURNAL AGROPLASMA VOLUME 10 NO 1 TAHUN 2023
Publisher : UNIVERSITAS LABUHANBATU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/agroplasma.v10i1.4188

Abstract

Handeuleum (Graptophyllum pictum L. Griff) is a plant that is used as a medicinal plant with secondary metabolite compounds so that it can overcome several diseases. Exploration of endophytic bacteria in handeuleum plants needs to be done, because the content of secondary metabolites can be used to suppress the growth of plant pathogens.The purpose of this study was to obtain isolates of endophytic bacteria and find out their characteristics. This research was conducted with an exploratory method that began with the isolation of endophytic bacteria and several tests were carried out such as hemolysis activity, hypersensitivity, gram test, chitinolytic test, phosphate solvent activity, and antagonist test.The isolation results obtained a high population of endophytic bacterial isolates, namely in the roots, as many as 8 isolates that are pathogenic in mammals, hypersensitivity tests showed no isolates that were pathogenic in plants, gram tests obtained as many as 24 isolates that were gram-positive, as many as 5 isolates were able to lyse phosphate, no isolates could degrade chitin, as many as 2 isolates were antimicrobial against Rastolnia solanacearum indicated by the presence of clear zones and 26 isolates were able to suppress the growth of Fusarium oxysporum. Keywords: Antimicrobial, pathogenic, hemolysis, hypersensitive, chitinolytic
Efektivitas Biofungisida Jamur Trichoderma harzianum dan Trichoderma koningii dengan Berbagai Dosis terhadap Intensitas Serangan Penyakit Layu Jamur Fusarium dan Pertumbuhan Vegetatif pada Tanaman Cabai Merah (Capsicum annum L.) Sadin, Yuliana Ivantri; Marhaeni Julyasih, Ketut Srie; Manalu, Jean Nihana
JURNAL AGROPLASMA Vol 12, No 2 (2025): Vol 12, No 2 (2025): (JURNAL AGROPLASMA VOLUME 12 NO 2 TAHUN 2025)
Publisher : UNIVERSITAS LABUHANBATU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/agroplasma.v12i2.8121

Abstract

This study focuses on controlling Fusarium wilt disease in red chili plants, a common horticultural crop in Indonesia. The disease caused by Fusarium pathogens poses challenges to farmers. An alternative control method is the use of biofungicides derived from fungi Trichoderma harzianum and Trichoderma koningii. The research was conducted at two different locations, including the isolation of Fusarium pathogens and identification of  Trichoderma fungi. The multiplication of  T. harzianum and  T. koningii was carried out on a rice medium at the Agensia Hayati / Botanical Pesticide Laboratory in Biaung. Seedling planting and biofungicide application took place at the Agensia Hayati Laboratory field, Jalan Tegal Harum, Gang Sakura, Biaung, East Denpasar District, Denpasar City, Bali, from May to August 2025.The experimental design used was a Completely Randomized Design (CRD) with 7 treatments and 5 replications. Treatments included a control (0 grams) and biofungicide doses of 10, 20, and 30 grams for both T. harzianum and T. koningii. Statistical analysis using one-way ANOVA showed significant differences (p<0.05) among treatments in reducing Fusarium wilt disease intensity. The highest dose of 30 grams of both biofungicides was the most effective, achieving 100% disease suppression 28 days after treatment. Additionally, the biofungicide application showed significant effects on the number of leaves at 7 days after treatment and plant height at 28 days after treatment. These results indicate that biofungicides from T. harzianum and T. koningii can be used as an environmentally friendly and sustainable alternative to control Fusarium wilt in red chili plants. Keywords: Fusarium Wilt, red chili pepper, Trichoderma harzianum, Trichoderma koningii
Co-Authors Marhaeni Julyasih, Ketut Srie Maya Mariana Sadin, Yuliana Ivantri