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All Journal Jurnal Fitopatologi Indonesia Agrikultura JURNAL ILMU PERTANIAN Biology, Medicine, & Natural Product Chemistry JURNAL AGRILAND JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA JPT : JURNAL PROTEKSI TANAMAN (JOURNAL OF PLANT PROTECTION) AGROSAINSTEK: Jurnal Ilmu dan Teknologi Pertanian Jurnal Hilirisasi IPTEKS (JHI) Jurnal Agronomi Tanaman Tropika (JUATIKA) Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Jurnal AGRISEP: Kajian Masalah Sosial Ekonomi Pertanian dan Agribisnis Andalasian International Journal of Entomology Biodiversitas Journal of Biological Diversity
Haliatur Rahma, Haliatur
Universitas Andalas
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Dentistry Economics, Econometrics & Finance Engineering Environmental Science Health Professions Medicine & Pharmacology Public Health Social Sciences Veterinary Other

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The potential of endophytic bacteria to suppress bacterial leaf blight in rice plants HALIATUR RAHMA; NURBAILIS NURBAILIS; MUNZIR BUSNIAH; NILA KRISTINA; YUMBA LARASATI
Biodiversitas Journal of Biological Diversity Vol. 23 No. 2 (2022)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d230223

Abstract

Abstract. Rahma H, Nurbailis, Busniah M, Kristina N, Larasati Y. 2021. The potential of endophytic bacteria to suppress bacterial leaf blight in rice plants. Biodiversitas 23: 775-782. Endophytic bacteria are potential as biocontrol agents against bacterial leaf blight (BLB) disease caused by Xanthomonas oryzae pv. oryzae in rice to support sustainable agriculture. This study aimed to select and characterize 22 endophytic bacteria isolated from healthy rice, determine their ability to promote plant growth and suppress bacterial leaf blight disease in rice and also identify potential endophytic bacterial isolates. The study was arranged in a Completely Randomized Design with 24 treatments and three repetitions. The treatments used in the current study consisted of Xanthomonas oryzae infected plants and treated with endophytic bacterial isolates; infected plants without endophytic bacteria treatment (positive control), non-infected plants (negative control). Identification of potential endophytic bacteria was performed based on 16S rRNA sequences. Three out of 22 bacterial isolates, i.e., LmB1, LmA6, and LmB2 were able to suppress bacterial leaf blight disease with severity levels of 35.82%, 23.78%, and 23.78%, respectively. Based on the rice plant growth parameters, three bacterial isolates (LmA6, LmB1, and LmB35) were able to increase the growth of rice plants with an average value of 69.56%, 56.51%, and 47.82%, respectively. Two bacterial isolates, i.e., LmB 1 and LmA6 suppress the development of bacterial leaf blight disease and increase the growth of rice plants. Based on DNA sequence comparisons of DNA fragments amplified by 16S rRNA related marker of the selected bacterial isolates and database, then LmA6, LmB2, LmB1, and LmB35 had similarities with Bacillus cereus MD152 (96.87%), Bacillus thuringiensis ATCC 10792 (98.20%), Ochrobactrum intermedium strain OI1 (97.52%), and Stenotrophomonas maltophilia strain A1w2 (97.92%), respectively. Our study revealed that the indigenous endophytic bacteria from rice plants could be potential biological agents for controlling bacterial leaf blight disease and increasing plant growth.
The potential of beneficial microbes to suppress the development of bacterial leaf blight in rice plants caused by Xanthomonas oryzae pv. oryzae HALIATUR RAHMA; MARTINIUS MARTINIUS; UJANG KHAIRUL; FADHILA RAHMI
Biodiversitas Journal of Biological Diversity Vol. 24 No. 8 (2023)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d240801

Abstract

Abstract. Rahma H, Martinius, Khairul U, Rahmi F. 2023. The potential of beneficial microbes to suppress the development of bacterial leaf blight in rice plants caused by Xanthomonas oryzae pv. oryzae. Biodiversitas 24: 4209-4217. Xanthomonas oryzae pv. oryzae (Xoo) is caused bacterial leaf blight in rice plants. One technique for controlling the bacterial leaf blight that currently being developed is using beneficial microbes. The purpose of this study was to isolate and identified beneficial microbes that can suppress bacterial leaf blight development in rice plants. In the present study fifteen isolates of beneficial microbes were investigated for their potential as an antagonist against Xoo, the causal agent of bacterial leaf blight of rice plants. Four isolates, namely Act-SK2, Act-Mn2, Act-Hr21, and Act-Pha4, showed the ability to reduce the area under progress curve (AUDPC) values by 51.33, 51.00, 84.00, and 82.33, respectively. The effectiveness of AUDPC suppression ranged between 80%-88%. Two out of four isolates showed potential in reducing the severity of BLB disease by 3.65% (Act-Sk2) and 3.88% (Act-Mn2) as compared to control. The effectiveness of both isolates in reducing disease severity was 86.34% (Act-Sk2) and 85.48% (Act-Mn2). Furthermore, identification based on 16S rRNA gene sequence analysis showed that three isolates, namely Act-Sk2, Act-Hr21, and Act-Pha4, belong to Actinobacteria. Each isolate showed 99.68% similarities with Streptomyces sp. strain KS02 (Acc. No. AB373961, 99.84% with Streptomyces sp. strains Al-Dhabi-119 (Acc. No.MK675528), and 99.64% with Streptomyces griseus strain K 2 (Acc. No. MK811436). Isolate Act-Mn2 showed 100% similarity with Penicillium janthinellum strain CMV006C1 (Acc. No. MK450697). The results of this study indicate that the four microorganisms tested have potential to be developed as biological agents.
Diversity of endophytic fungi of rice plants in Padang City, Indonesia, entomopathogenic to brown planthopper (Nilaparvata lugens) TRIZELIA TRIZELIA; HALIATUR RAHMA; MY SYAHRAWATI
Biodiversitas Journal of Biological Diversity Vol. 24 No. 4 (2023)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d240453

Abstract

Abstract. Trizelia, Rahma H, Syahrawati M. 2023. Diversity of endophytic fungi of rice plants in Padang City, Indonesia, entomopathogenic to brown planthopper (Nilaparvata lugens). Biodiversitas 24: 2384-2392. Various endophytic fungi can live in plant tissues for all or part of their life cycle without causing damage or disease in their host. Several genera of endophytic fungi have been reported to be entomopathogenic and can be used to control insect pests. This study aimed to determine the diversity of endophytic fungi from rice stems that were entomopathogenic against Nilaparvata lugens (Stål, 1854) or Brown Planthopper (BPH). Endophytic fungi were isolated from rice stems of IR42 and Cisokan varieties grown in Padang City, West Sumatra Indonesia. Isolated fungi were first evaluated for their pathogenicity against Tenebrio molitor larvae. Subsequently high pathogenicity showed isolates were tested on nymphs and adults of BPH. The results showed that the entomopathogenic fungi isolated from IR 42 and Cisokan were the members of genus Aspergillus, Trichoderma, and Beauveria. The entomopathogenic fungi from IR 42 were more diverse than Cisokan, and Beauveria sp. was the most common isolate and had a better ability to kill the BPH. The highest mortality of BPH was found in PIR 1.3 isolate, but the mortality was still relatively low (53.33% nymphs and 34.99% adults). Further study is needed to increase the effectiveness of these endophytic fungi against BPH directly or indirectly by inducing resistance.
Fungal diversity associated with anthracnose in chili peppers of West Sumatra, Indonesia, using conventional and NGS approaches RIKI WARMAN; HALIATUR RAHMA; DARNETTY DARNETTY; RITA NOVERIZA
Biodiversitas Journal of Biological Diversity Vol. 26 No. 9 (2025)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d260901

Abstract

Abstract. Warman R, Rahma H, Darnetty, Noveriza R. 2025. Fungal diversity associated with anthracnose in chili peppers of West Sumatra, Indonesia, using conventional and NGS approaches. Biodiversitas 26: 4257-4266. Curly red chili plants are one of the leading horticultural commodities in West Sumatra, Indonesia. However, there has been a 90% decline in yield due to anthracnose disease. Anthracnose is caused by various fungi from the Colletotrichum genus and other fungi that interact within it. The objective of this study is to compare the diversity of fungi associated with anthracnose disease symptoms in West Sumatra using NGS (Next-Generation Sequencing) and conventional identification techniques. This study used a field survey method involving the collection of chili fruit samples with anthracnose symptoms and the isolation of associated fungi. The survey was conducted at various chili farming locations in South Pesisir District, West Sumatra, Indonesia, to obtain representative samples. Fungal identification was performed using conventional NGS methods. The results of identification using conventional techniques yielded 298 fungal isolates, which were divided into 8 groups based on macroscopic characteristics and 3 genera based on microscopic characteristics, namely Colletotrichum 78.18%, Fusarium 16.11%, and Curvularia 5.7% Meanwhile, the fungi obtained using NGS techniques comprised 10 genera: Colletotrichum 26.36%, Peltula 22.34%, Moniliella 18.73%, Russula 15.2%, Linderina 12.13%, Fusarium 1.13%, Hydnum 0.98%, Rhexocercosporidium 0.44%, Crocinoboletus 0.33%, and Gymnopilus 0.36%, with 198 species. The results of this study indicate that fungal diversity associated with anthracnose symptoms using NGS technology is higher than that identified using conventional methods. These findings regarding dominant pathogenic fungi and their high variability provide important guidance for designing appropriate control measures and optimizing fungicide application.
Induction of Resistance to Larvae Crocidolomia pavonana F. (Lepidoptera: Crambidae) using Rhizobacteria to the Cabbage Indri Yanil Vajri; Trizelia; Haliatur Rahma
Andalasian International Journal of Entomology Vol. 2 No. 1 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijent.2.1.15-23.2024

Abstract

Crocidolomia pavonana is a significant pest on cabbage that reduces the quality and quantity of cabbage. Utilizing microorganisms such as rhizobacteria is an alternative environmentally friendly control that can potentially suppress the development of this pest. The study aimed to obtain rhizobacteria isolates capable of colonizing cabbage tissue and inducing plant resistance to C. pavonana larvae. The research was conducted at the Biological Control Laboratory and Greenhouse, Faculty of Agriculture, Universitas Andalas, Padang. The study used a Completely Randomized Design (CRD) with ten treatments and five replications. The treatment consisted of rhizobacteria isolates, including Bacillus thuringiensis, Bacillus subtilis, Serratia marcescens, Stenotrophomonas maltophilia, as well as a negative control (aquadest sterile) and a positive control (Cypermethrin insecticide). The test was carried out by soaking the seeds in a suspension containing rhizobacteria with a population density of 10⁸ cells/ml. The variables observed were larval mortality, pupa and imago formation percentage, and increased salicylic acid production. The data were analyzed using variance and continued with the LSD further test at the 5% level. The results showed that all rhizobacteria isolates colonized into cabbage plant tissue could kill C. pavonana larvae and inhibit these insects' biological development. B. thuringiensis KJKB7.3 showed better results with the highest mortality value (62.67%). Soaking cabbage seeds with rhizobacteria can increase the content of salicylic acid. Based on this research, the rhizobacteria used in the research have the potential to be developed as biological agents to control C. pavonana.
The potential in consortium of endophytic bacteria for controlling sheath blight by Rhizoctonia solani Kuhn in rice plants Haliatur Rahma; Zurai Resti; Yusniwati Yusniwati; Fauzan Abid Hanif Nasution
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 25 No. 2 (2025): SEPTEMBER, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA: JOURNAL OF TROPICAL PLAN
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jhptt.225218-229

Abstract

Rhizoctonia solani Kühn is a pathogenic fungus that causes sheath blight disease in rice. One effective strategy for managing this disease is the use of biological control, particularly through consortia of endophytic bacteria. This study aimed to identify the most effective endophytic bacterial consortium for suppressing sheath blight severity while also enhancing rice growth and yield. A Completely Randomized Design (CRD) was aemployed with six treatments, three replications, and three experimental units per treatment. The treatments included four bacterial consortia composed of combinations of Bacillus thuringiensis LmD13, Ochrobactrum intermedium LmB1, and Stenotrophomonas maltophilia LmB35, along with positive and negative controls. The experiment involved treating rice seeds and soaking seedling roots with the bacterial consortia before transplanting. R. solani was inoculated onto the rice leaf sheaths 40 days after planting. The effectiveness of each consortium as a biocontrol agent was evaluated based on incubation period, disease incidence, disease severity, and the area under the disease progress curve (AUDPC). Their biostimulant potential was assessed through parameters related to seedling growth, plant development, and yield. Results indicated that the endophytic bacterial consortia effectively suppressed sheath blight and significantly improved rice growth and production. Notably, the consortium of B. thuringiensis LmD13, O. intermedium LmB1, and S. maltophilia LmB35 extended the incubation period to 35 days post-inoculation and reduced disease incidence, severity, and AUDPC to 22.22%, 0.29%, and 1.01, respectively. This consortium also enhanced rice yield, with fresh and dry grain weights reaching 72.78 g and 63.02 g, respectively, compared to the positive control. These findings suggest that this bacterial consortium holds strong potential as a biocontrol agent and yield enhancer in rice cultivation.
Effectiveness of entomopathogenic fungal combinations on eggs and larval development of Spodoptera frugiperda J.E. Smith (Lepidoptera: Noctuidae) in corn plants Indri Yanil Vajri; Trizelia Trizelia; Haliatur Rahma; Yusniwati Yusniwati
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 26 No. 2 (2026): SEPTEMBER, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA: JOURNAL OF TROPICAL PLAN
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jhptt.226290-303

Abstract

Spodoptera frugiperda J.E. Smith is an invasive pest of corn, requiring effective and environmentally friendly control strategies. This study aimed to evaluate the effectiveness of three entomopathogenic fungal (EPF) isolates, namely Beauveria bassiana WS, Metarhizium anisopliae B22C, and Trichoderma asperellum A116, tested as single isolates or in combination against S. frugiperda eggs and larvae. The experiment used a Completely Randomized Design (CRD) with eight treatments (three single treatments, four combinations, and a control) and four replications. Conidial suspensions were applied by spraying onto eggs and second-instar larvae. Parameters observed included the percentage of unhatched eggs, larval mortality, and pupal and adult development. Chitinase, protease, and lipase activities were qualitatively tested to support the identification of pathogenicity mechanisms. Data were analyzed using analysis of variance (ANOVA), followed by the LSD test at a 5% significance level. The results showed that EPF combinations increased mortality and inhibited the development of S. frugiperda. The combination of B. bassiana WS + T. asperellum A116 was the most effective treatment, inhibiting egg hatching by 85% and reducing pupal and adult formation to 25.95% and 12.96%, respectively. The highest mortality of first-instar larvae was observed in the single treatment of B. bassiana WS and the tertiary combination of B. bassiana WS + M. anisopliae B22C + T. asperellum A116, at 24.18% and 22.91%, respectively. Consistent enzymatic activity indicated potential biocontrol synergy through the production of cuticle-degrading enzymes. This combination is recommended for field-scale testing as an environmentally friendly alternative to reduce dependence on chemical insecticides.
Co-Authors , Giyanto . Giyanto . Gusmini . Reflinaldon Afrima Sari Agustian Agustian Agustian Agustian Akmal Djamaan Alfons Dwi Putra Butar-Butar Aprizal Zainal Armansyah Armansyah Arneti Arneti Beatrix Sofranes Napitupulu Darnetty Darnetty Dede Suhendra Dede Suhendra Elfitri Syahdia Eri Sulyanti Eri Sulyanti FADHILA RAHMI Fajar Akbar Fauzan Abid Hanif Nasution Hasmiandy Hamid Ika Listiana Indra Dwipa Indri Yanil Vajri Indri Yanil Vajri Indri Yanil Vajri Indri Yanil Vajri Indri Yanil Vajri Jhon Nefri Jumsu Trisno Liswarni, Yenny Magdalena Saragih Martinius MARTINIUS MARTINIUS Martinius Martinius Martinius Martinius Martinius Martinius Martinius Martinius Martinius Martinius Meity S Sinaga Meity S Sinaga, Meity S Memen Suharman, Memen Memen Surahman Munzir Busniah Mutiara Septu MY SYAHRAWATI My Syahrawati MY SYAHRAWATI My Syahrawati Nasution, Lita Nefri, Jhon NILA KRISTINA NILA KRISTINA Noveriza Hermeria Noveriza Hermeria Nurbailis Nurfitri Sari Nurhaliza Nurhaliza Nusyirwan Nusyirwan Nusyirwan Nusyirwan Nusyirwan Nusyirwan Putri, Wahyuni Eka Rahma, Zola Puti Reflin Reflin Reflin Reflin Reflin Reflin Retna Astuti Kuswardani Ridho, Muhammad Arif Rika Hariance Rika Hariance RIKI WARMAN RITA NOVERIZA Rita Noveriza Rita Noveriza Rusdi Rusli Rusdi Rusli Ryan Dwi Setyawan Ryan Dwi Setyawan Ryan Hidayat Saipul Sihotang Sandra Desiska Silvia Oktaviani Sri Wahyuni Sri Wahyuni Sri Wahyuni Sri Yuliani Sri Yuliani Sufia, Yolanda Sulyanti, Eri Sulyanti, Eri Suryati . Tre Julia Nasral Trizelia UJANG KHAIRUL Wahyuni Eka Putri Winarto Winarto Winarto Winarto Winarto Winarto Yaherwandi Yaherwandi Yaherwandi Yulmira Yanti YUMBA LARASATI YUNISMAN . Yunisman Yunisman Yusniwati Yusniwati Zola Puti Rahma Zurai Resti