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All Journal Jurnal Pengendalian Hayati Agrovigor: Jurnal Agroekoteknologi Plumula : Berkala Ilmiah Agroteknologi Agrifor : Jurnal Ilmu Pertanian dan Kehutanan Jurnal Ilmu-Ilmu Pertanian Indonesia Jurnal Agroekoteknologi Jurnal Perlindungan Tanaman Indonesia JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA Jurnal Ilmiah Universitas Batanghari Jambi BIOEDUSCIENCE Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) JPT : JURNAL PROTEKSI TANAMAN (JOURNAL OF PLANT PROTECTION) JURNAL AGROHITA Jurnal Pembelajaran dan Biologi Nukleus Jurnal Agrotropika PLAKAT : Jurnal Pelayanan Kepada Masyarakat Nusantara Science and Technology Proceedings Bioscientist : Jurnal Ilmiah Biologi Berkala Penelitian Hayati JPMP Agrocentrum Jurnal Bioteknologi & Biosains Indonesia (JBBI) Jurnal Bioteknologi & Biosains Indonesia
Yenny WURYANDARI
Program Studi Agroteknologi, Fakultas Pertanian, UPN “Veteran” Jawa Timur
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Social Sciences Other

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Optimization of Bioencapsulation of Bacillus sp. to Increase Resistance to Bacterial Wilt and Growth of Cayenne Pepper Ajeng Distya Anjani; Yenny Wuryandari; Safira Rizka Lestari
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 4 (2025): August 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i4.1325-1334

Abstract

Cayenne pepper has a high production demand. The high demand does not match the amount of production produced. One of the factors for decreased production is the presence of bacterial wilt disease caused by Ralstonia solanacearum. Bacterial wilt control can be done with the application of antagonistic bacteria, namely Bacillus sp. Bacillus sp. application requires an optimal formulation to maintain bacterial activity in the soil, one of which is Bacillus sp. encapsulation. This study aims to determine the effectiveness of Bacillus sp. encapsulation as a formulation of biological agent bacteria for the control of bacterial wilt disease and cayenne pepper plant growth. This study used the encapsulating material concentration and dosage factors for application to plants. Encapsulation was made using the extrusion method. The results showed that the concentration of 2% sodium alginate and 1.5% gelatin gave a significant difference in disease intensity of 18.89% and in the growth parameters of cayenne pepper plants were able to reach a height of 30.58 cm and a root length of 17.18 cm. The right concentration and high dose provide the ability to suppress intensity and encourage maximum growth
The Potential for Controlling Maize Pest Spodoptera frugiperda (Lepidoptera: Noctuidae) Using Biological Agents Bacillus spp. Muhammad Qoyyimul Amri; Yenny Wuryandari; Noni Rahmadhini
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 15 No. 2 (2026): April 2026
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v15i2.608-617

Abstract

Maize production is still facing many challenges nowadays.  One of the main challenges in maize production is pest attacks.  S. frugiperda has been causing significant damage to maize farming in Indonesia recently.  This research was conducted to determine the potential of Bacillus spp. isolates Bcz-20 and Bcz-30 are identified as biological agent candidates to control the S. frugiperda population, with bacterial population densities of 109 CFU/mL, 108 CFU/mL, and 107 CFU/mL, respectively, as determined by in vitro and in vivo application tests.  The Bcz-20 treatment with a population density of 107 CFU/mL was capable of suppressing the S. frugiperda larvae population in an in vitro application test, resulting in a mortality percentage of 47.5%. The Bcz-20 treatment with a population density of 109 CFU/mL was capable of suppressing the S. frugiperda larvae population by in vivo application test, resulting in a mortality percentage of 70 %.  The conclusion, Bacillus spp. Bcz-20 isolates with a population density of 107 CFU/mL are efficient and effective for controlling the S. frugiperda larvae population.
Potential of Bacillus spp. Isolates as Biological Control Agents Against Rhizoctonia solani, the Causal Agent of Sheath Rot in Maize (Zea mays L.) Salma Alfiani Nadiva; Yenny Wuryandari; Tri Mujoko
Bioscientist : Jurnal Ilmiah Biologi Vol. 14 No. 2 (2026): June
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v14i2.20689

Abstract

This study aimed to evaluate the effectiveness of laboratory-collected Bacillus spp. isolates against Rhizoctonia solani, the causal agent of maize sheath blight, under both in vitro and in vivo conditions, as available information on their efficacy remains limited. The in vitro assay was conducted using the dual culture method with five Bacillus spp. isolates, namely Bcz-14, Bcz-16, Bcz-20, Bcz-21, and Bcz-30, to assess their inhibitory activity against R. solani. The results showed that all isolates were able to inhibit pathogen growth, although the percentage of inhibition varied among isolates. Isolate Bcz-14 exhibited the highest mean inhibition, while isolates Bcz-16 and Bcz-21 were selected for the in vivo assay based on a combination of mean inhibitory activity and consistency across replications. The in vivo assay was conducted using the two selected isolates with different application times, namely seven days before planting and at planting. The results indicated that treatment B1T1, consisting of Bcz-16 applied seven days before planting, showed a greater tendency to suppress disease development, as indicated by a longer incubation period and the lowest disease intensity of 17.78%. These findings suggest that isolate Bcz-16 has potential for further development as a biological control candidate for maize sheath blight. However, further evaluation under field conditions is required to confirm its effectiveness.
Effectiveness of Antagonistic Agents from Several Bacillus spp. Isolates against Anthracnose Disease (Colletotrichum capsici) in Chili Pepper Fruit (Capsicum annuum L.) Aullyvia Putri Nabiella; Yenny Wuryandari; Herry Nirwanto
Bioscientist : Jurnal Ilmiah Biologi Vol. 14 No. 2 (2026): June
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v14i2.20692

Abstract

This study aimed to evaluate the antagonistic activity of selected Bacillus spp. isolates against Colletotrichum capsici and determine the most effective isolate and cell density for suppressing anthracnose in red chili pepper. The study was conducted under in vitro and in vivo conditions. The in vitro assay tested five Bacillus spp. isolates, namely Bcz-14, Bcz-16, Bcz-20, Bcz-21, and Bcz-30, at cell densities of 10⁹ and 10¹⁰ CFU/mL. The three most effective treatments from the in vitro assay were subsequently evaluated under in vivo conditions. Data were analyzed using SPSS version 24 through analysis of variance (ANOVA) at a 5% significance level, followed by Tukey’s honestly significant difference (HSD) test at 5% when significant differences were detected. The results showed that B1K1 treatment (Bcz-14 at 10⁹ CFU/mL), with an inhibition zone of 5.83 mm; B5K1 treatment (Bcz-30 at 10⁹ CFU/mL), with an inhibition zone of 5.50 mm; and B2K1 treatment (Bcz-16 at 10⁹ CFU/mL), with an inhibition zone of 4.16 mm, exhibited the most stable inhibitory effects against C. capsici growth in vitro. The in vivo assay demonstrated that B1K1 treatment (Bcz-14 at 10⁹ CFU/mL) was the most effective treatment, resulting in a disease intensity of 26.25% and a control efficacy of 51.16%.
Potential of Some Natural Media as Alternative Media for Growth of Bacillus sp. Kusumawati, Diah Budi; Wuryandari, Yenny; Purnawati, Arika
BIOEDUSCIENCE Vol 10 No 1 (2026): BIOEDUSCIENCE
Publisher : Universitas Muhammadiyah Prof. Dr. Hamka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/jbes/18527

Abstract

Background: Bacillus sp. as a biological agent can be an environmentally friendly disease control solution by producing antimicrobial compounds. However, expensive culture media is an obstacle in its use. Alternative media made from natural materials such as legumes are considered potential because they are rich in nutrients and affordable. This study aims to find the best alternative media that support the growth and viability of Bacillus sp. isolate Bcz 30. Method: This research was conducted at the Plant Health Laboratory of the National Development University “Veteran” East Java in July-November 2024. This research used a completely randomized design (RAL) with one stage of in vitro testing. The implementation of the test stages includes testing the growth of Bacillus sp. isolate Bcz 30 on each alternative media, testing the viability of Bacillus sp. isolate Bcz 30 on liquid media then the two highest viability results on liquid media will be continued for viability tests on different formulations, namely solid and liquid formulas. Analysis of the data obtained using the variance analysis test (ANOVA), if the data presented is significantly different, it will be continued with the BNJ test at the 5% level. Result: Based on the growth test, tolo bean and lamtoro gung media can replace NA media. Based on the liquid formula viability test, tolo bean and lamtoro gung media with 30% concentration had the highest viability results. Based on the formulation test, the solid formula can maintain the viability of Bacillus sp. than the liquid formula. Conclusion: Bean and lamtoro gung media with 30% concentration formulated with solid formula is the best alternative media for Bacillus sp. isolate Bcz 30.
Exploration Of Rice Plant Endophyte Bacteria To Suppress Xanthomonas oryzae Bacterial Leaf Blight Disease Ratih Nadhila Putri; Yenny Wuryandari; Endang Tri Wahyu
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 11, No 2: Jurnal Pembelajaran Dan Biologi Nukleus June 2025
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v11i2.7338

Abstract

Background: Rice is a major food commodity for Indonesian. According to BPS (2022) rice production in 2021 decreased 0.43%. The decline caused by various factors, one of which is bacterial leaf blight disease by the pathogenic bacteria Xanthomonas oryzae. Control of X. oryzae mostly uses pesticides, but this control has a negative impact on the environment, therefore it is necessary to develop endophytic bacteria (EB) that can inhibit the growth of X. oryzae and can act as PGPR. This study was to determine the EB ability in healthy rice stem tissue to suppress bacterial leaf blight disease caused by the bacteria X. oryzae. Methodology: This research was were used isolation from infected plant for X. oryzae and from healthy plant for EB, data was analyzed using the corresponding formula. Findings: found 10 isolates of EB that could inhibit the X. oryzae growth as seen from the inhibition zone produced in the antagonist test. The EB isolates produced the largest inhibition zones such as BE18 (23.3 mm, very strong category), BE16 (13.3 mm, strong category), and BE3 (11.6 mm, strong category). The 4 isolates with bactericidal inhibition mechanisms, namely isolates (BE11, BE15, BE16, and BE18), 6 isolates with bacteriostatic inhibition mechanisms, namely isolates (BE3, BE5, BE6, BE7, BE12, and BE13). Contribution: The availability of EB present in the tissues of healthy rice stems is still relatively high and can be used to suppress the growth of pathogenic bacterium X. oryzae. This rseult also supported by the beneficial properties of EB, which can enhance plant resistance
Potensi Bacillus mycoides Ba-11 dan Bacillus sp. Bcz-20 untuk Mengendalikan Penyakit Hawar Daun Bakteri Secara In-Vitro Pratama, Andhika Wahyu; Prasetyawati, Endang Tri Wahyu; Wuryandari, Yenny
BIOEDUSCIENCE Vol 10 No 2 (2026): BIOEDUSCIENCE
Publisher : Universitas Muhammadiyah Prof. Dr. Hamka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/jbes/22101

Abstract

Background: Bacterial leaf blight is one of the major diseases in rice caused by Xanthomonas oryzae pv. oryzae, which can significantly reduce rice productivity. The use of chemical bactericides may cause environmental problems; therefore, biological control using antagonistic bacteria such as Bacillus spp. is considered a sustainable alternative. This study aimed to evaluate the inhibitory potential of Bacillus mycoides Ba-11 and Bacillus sp. Bcz-20 against Xanthomonas sp. under in vitro conditions. Method: The experiment was conducted using a completely randomized design with three treatments: Bacillus mycoides Ba-11, Bacillus sp. Bcz-20, and a control (sterile distilled water), each with nine replications. Antagonistic activity was tested using the well diffusion method on nutrient agar. The diameter of inhibition zones was measured after 24–48 hours of incubation and analyzed using the Dunn test at a 5% significance level. Result: Both Bacillus mycoides Ba-11 and Bacillus sp. Bcz-20 formed inhibition zones categorized as moderate to strong, indicating their ability to suppress the growth of Xanthomonas sp. Although Bacillus sp. Bcz-20 produced a larger inhibition zone, statistical analysis showed no significant difference between the two isolates. Conclusion: Both Bacillus mycoides Ba-11 and Bacillus sp. Bcz-20 have comparable and significant potential as biological control agents against Xanthomonas sp. through antibiosis mechanisms.
Potential of Bacillus sp. and Pseudomonas fluorescens in Suppressing Bacterial Leaf Blight (BLB) Xanthomonas oryzae pv. oryzae Simorangkir, Laura Enjelika; Puernawati, Arika; Wuryandari, Yenny
BIOEDUSCIENCE Vol 10 No 2 (2026): BIOEDUSCIENCE
Publisher : Universitas Muhammadiyah Prof. Dr. Hamka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/jbes/22643

Abstract

Background: Oryza sativa L. is a major food commodity and a source of carbohydrates for most of Indonesia’s population. Based on BPS data, rice production has declined every year. The decline in rice production is caused by attacks by plant pests (OPT). Xanthomonas oryzae is a bacterium that causes bacterial leaf blight (BLB) in rice, which causes yield losses of up to 60-80%. An environmentally friendly alternative for controlling Xanthomonas oryzae is using endophytic bacteria Bacillus sp. and Pseudomonas fluorescens. Methods: The experiment was conducted using two tests: in vitro and in vivo assays. The in vitro assay was arranged in a completely randomized design with 4 treatments and 4 replications, resulting in 16 experimental units. The experimental unit consisted of one Petri dish containing Nutrient Agar (NA) medium. Antagonistic activity was evaluated using the disk diffusion method against Xanthomonas oryzae. The in vivo assay was arranged in a completely randomized factorial design with 10 treatments and 3 replications. Each replication consisted of 6 rice plants grown in a polybag, resulting in a total of 180 plants as experimental units. Treatments consisted of different concentrations of antagonistic bacterial suspensions applied to soil before pathogen inoculation. The pathogen Xanthomonas oryzae was inoculated onto rice plants during the vegetative stage. Results: Bacillus sp. and Pseudomonas fluorescens can suppress Xanthomonas oryzae disease. The results showed that a consortium treatment of these two bacteria produced the highest inhibitory power of 9,125 mm. In vivo testing, the consortium treatment with 20 ml/plant resulted in the lowest disease intensity of 6,06% and an incubation period of 4 days. Conclusions: The consortium treatment of Bacillus sp. and Pseudomonas fluorescens was able to suppress bacterial leaf blight disease compared to other treatments.
Evaluation of Streptomyces spp. Isolated from the Rhizosphere of Avicennia marina as a Biological Control Agent Against Bacterial Leaf Blight and Their Effects on Rice (Oryza sativa L.) Growth Azzura Talitha Maulidya Irawan; Yenny Wuryandari; Tri Mujoko
Bioscientist : Jurnal Ilmiah Biologi Vol. 14 No. 3 (2026): September
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v14i3.22017

Abstract

This study aimed to evaluate the potential of three Streptomyces spp. isolates obtained from the rhizosphere of Avicennia marina at the Mangrove Botanical Garden, Surabaya, for suppressing bacterial leaf blight (BLB) development under in vivo conditions and assessing their effects on plant growth. In a previous study, the three Streptomyces spp. isolates (St8, St9, and St19) demonstrated strong inhibitory activity in in vitro assays. The present study was conducted using a factorial Completely Randomized Design (CRD), with the first factor consisting of Streptomyces spp. isolates (St8, St9, and St19) and the second factor consisting of biological agent suspension doses (5, 10, and 15 ml plant⁻¹). A diseased control treatment was included for comparison. Each treatment was replicated three times, resulting in a total of 30 experimental units. The collected data were analyzed using analysis of variance (ANOVA) with IBM SPSS Statistics 24 software at a 5% significance level. The in vivo efficacy assay showed that the application of Streptomyces spp. isolate St19 at a dose of 5 ml plant⁻¹ only delayed the incubation period of X. oryzae by 1.1 days and was unable to suppress BLB disease severity. The same treatment significantly affected rice tiller number, reaching 13.6 tillers at 56 days after transplanting (DAT), but did not affect plant height throughout the observation period. The results indicate a discrepancy between the in vitro and in vivo assay outcomes. The potential of the tested Streptomyces spp. isolates as biological control agents remains limited; however, they showed a significant effect on rice tiller development.
Co-Authors Achmad Fiqri Agus Wahyudi Aisyah Lulu Hariyanto Ajeng Distya Anjani Annisa Zukhruf Oktavia Salamah arfah Arika Purnawati Aullyvia Putri Nabiella Azzura Talitha Maulidya Irawan Bambang HADISUTRISNO Bambang Hadisutrisno Budi Rianto Devi Tria Anjarsari Devi Tria Anjarsari Didiek Tranggono Edo Pandu Pratama Endang Tri Wahyu Erlyana Desy Rahmawati Fadia Nur Rahma Budiarto Frida Nur Aisah Gita Pawana Hera Amalia Putri Belangi Herry Nirwanto Herry Nirwanto HIDAYATI, KIKI I. Hartana Indah Sari Dwi Agustin Indarwati Indarwati Kaswan Badami Kiki Sandra Amelia Kusuma Wardhani Mas’udah Kusumawati, Diah Budi Lukmanul Hakim M. Husni Tamrin Maroeto ., Maroeto Maroeto Maroeto Mochammad Mirza Saputra Mochammad Mirza Saputra Muhammad Qoyyimul Amri Munir, Ahmad Arsyad Nauval Zakqy Nirwana Septania Galih Perwira Moekti Nolla Dwi Elvira Noni Rahmadhini Noni Ramadhini Nova Andriani Novita Endah Ariani Novita Endah Ariani Nuriatus Sholikhah Penta SURYAMINARSIH Perwira Moekti, Nirwana Septania Galih Prasetyawati, Endang Tri Wahyu Prasetyawati, Endang Triwahyu Pratama, Andhika Wahyu Puernawati, Arika Putranto Sasikirono Ratih Nadhila Putri Ratu Yusnita Zhalsabilla Rulinggar, Nia Safira Rizka Lestari Sagala, Yosua Nathanael Itona Salma Alfiani Nadiva Saputra, Mochammad Mirza Saputra, Mochammad Mirza Setiawan Setiawan Shelomitha Kumala Mawardhany Sherly Arindawati Simorangkir, Laura Enjelika Sri Wiyatiningsih Sulistyanto Suwandi Syamsul Arifin Taufik Hidayat Tr Mujoko Tri MUJOKO Triwidodo ARWIYANTO Triwidodo Arwiyanto Wildan Taufik Raharja Windriyanti, Wiwin Yovita Nathania Zainal Abidin Achmad Zakqy, Nauval