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All Journal Cropsaver : Journal of Plant Protection Agrovigor: Jurnal Agroekoteknologi Jurnal Agroekoteknologi BIOEDUSCIENCE JPT : JURNAL PROTEKSI TANAMAN (JOURNAL OF PLANT PROTECTION) Jurnal Pembelajaran dan Biologi Nukleus Jurnal Agrotropika Jurnal Bioteknologi & Biosains Indonesia (JBBI) Jurnal Bioteknologi & Biosains Indonesia
Prasetyawati, Endang Triwahyu
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media

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Consortium of Bacillus sp. BTH22 and Trichoderma sp. to Control Bacterial Leaf Blight Disease in Rice Plants Dwirizki Permata, Aprilla Hendiana; Purnawati, Arika; Prasetyawati, Endang Triwahyu
CROPSAVER Vol 8, No 2 (2025)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cropsaver.v8i2.65958

Abstract

Rice is a major food commodity in Indonesia that is currently experiencing a decline in production due to several factors, one of which is bacterial leaf blight (BLB) caused by the bacterium Xanthomonas sp. The use of chemicals in controlling this disease has many limitations, so alternatives are needed, such as antagonistic microbes. This study aims to evaluate the effectiveness of Bacillus sp. BTH22 and Trichoderma sp. individually and in consortium in suppressing BLB disease in rice plants in vitro and in vivo. The study was conducted at the Plant Health Laboratory of  Universitas Pembangunan Nasional “Veteran” Jawa Timur and Green House of Kebun Bibit Wonorejo from March to June 2025. The methods used included in vitro diffusion well test and in vivo disease intensity observation with a completely randomized design consisting of 5 treatments, namely control and spraying of antagonistic microbes Bacillus sp. BTH22 and Trichoderma sp. alone or in consortium with 4 replicates. Data analysis used analysis of variance (ANOVA) and post-hoc HSD tests at a 5% significance level. The results show that the treatment with the Bacillus sp. BTH22 and Trichoderma sp. consortium was the most effective, with an inhibition zone of 13 mm, which is classified as strong, and the lowest disease intensity of 30.02% at 55 HST with a suppression rate of 69.98%. These results indicate that the consortium of the two antagonistic microorganisms has high potential as an effective and sustainable biological control agent for BLB based on the observed parameters of inhibition zone and disease attack intensity.
Isolation and Identification of Indigenous Bacteria Potential to Degradate Mancozeb from Shallots (Allium cepa L.) Cultivation Land in Nganjuk District Khairunnisa, Nabila Zahra; Prasetyawati, Endang Triwahyu; Purnawati, Arika
CROPSAVER Vol 8, No 2 (2025)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cropsaver.v8i2.67683

Abstract

The use of a fungicide containing the active ingredient mancozeb in shallot fields to control moler disease, if not managed in terms of dose and frequency, it has the potential to harm soil in physical, chemical and biological ways. One method for repairing this damage is too use local microbes. This research attempts to determine the types of bacteria in soil treated to mancozeb fungicide through a morphological and physiological characterization process. Soil samples were collected from the shallot producing region of Balongrejo District, Nganjuk Regency. The method in this research is to isolate soil samples at a depth of 0-20 cm. Bacteria were isolated and multiplied using the streak plate technique on nutrient agar medium. Identification was performed on macroscopic and microscopic morphological features well as physiological characters based on the method of Schaad et al. (2001). Bergey's Manual of Determinative Bacteriology Ninth Edition was then used to identify the isolated bacteria. The research results showed that 14 bacterial isolates were isolated, 5 isolates suspected to be the genus Bacillus, 7 isolates suspected to be the genus Corynebacterium, 1 isolate suspected to be Lactobacillus, and 1 isolate unidentified. All indigenous bacterial isolates were able to reduce the concentration of mancozeb fungicide through measurements using a UV-Vis spechtrophotometer with a wavelength of 268 nm. The highest degradation percentage was bacterial isolate I8 (75%) and the lowest was bacterial isolate I7 (19%).
Co-Authors Abifah, Serlia Nur Al Rahmad, Nirmala Putri Amalia, Anisa Rizki Arika Purnawati Dita Megasari Dwirizki Permata, Aprilla Hendiana Febiola, Regina Rosari Heriyati, Sukma Herry Nirwanto Khairunnisa, Nabila Zahra Maulina Aizah, Shinta Octavianti, Dewi Fortuna Penta SURYAMINARSIH Perwira Moekti, Nirwana Septania Galih Sagala, Yosua Nathanael Itona Yanti, Vika Yenny WURYANDARI