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Identification and Incidence of Rice Diseases (Oryza sativa L.) in Conventional Land in Penebel Village Rahayu, Diajeng Putri Ayu; Julyasih, Ketut Srie Marhaeni; Yuliastuti, Yuliastuti
Jurnal Biologi Tropis Vol. 25 No. 4b (2025): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i4b.10798

Abstract

Rice is a popular and widely consumed food crop in Indonesia, making disease a crucial factor in rice production. Penebel Village is a major rice producer, so disease damage significantly impacts rice productivity. This study was conducted to determine the types, characteristics, and incidence of rice plant diseases in conventional fields. The method used was exploratory descriptive, consisting of field surveys and interviews, as well as microscopic observations. Samples were taken using the quadrant method with five sampling points. Each point consisted of 16 plants, resulting in a total of 80 samples. Identification was performed using macromorphology. The rice plants observed were in the vegetative phase. The results of the study showed that in the rice fields were found Pyricularia sp. causing blast disease, Fusarium sp. causing fusarium wilt, Cercospora sp. causing narrow brown leaf spots, Helminthosporium sp. causing brown spots and Xanthomonas sp. causing bacterial leaf blight. The results of the calculation of disease incidence in conventional rice fields were blast (10%), fusarium (26.25%), leaf spots (16.25%), brown spots (51.25%), and bacterial leaf blight (50%). The results of the study indicate that the types, characteristics and incidence of diseases that appear in conventional agricultural land in Penebel village are very complex, so that more appropriate disease control is needed.
Uji Organoleptik Dan Analisis KAdar Antioksidan Variasi Formulasi Yoghurt Dengan Penambahan Buah Jeruk Siam (Citrus nobilis L.) Al achmad, Ajhie Syachrul Qirom; Widiyanti, Ni Luh Putu Manik; Yuliastuti, Yuliastuti
BEST Journal (Biology Education, Sains and Technology) Vol 9, No 1 (2026): Juni 2026
Publisher : Program Studi Pendidikan Biologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/best.v9i1.13064

Abstract

Penelitian ini bertujuan untuk mengkaji pengaruh variasi formulasi yogurt dengan penambahan sari buah jeruk siam (Citrus nobilis L.) terhadap kualitas organoleptik dan aktivitas antioksidan sebagai upaya meningkatkan daya terima dan nilai fungsional produk. Penelitian ini menggunakan metode eksperimental dengan rancangan acak lengkap (RAL) yang terdiri atas tiga perlakuan formulasi, yaitu Formulasi 1 (45 ml yogurt + 15 ml gula 60% + 15 ml sari jeruk), Formulasi 2 (30 ml yogurt + 15 ml gula 60% + 15 ml sari jeruk), dan Formulasi 3 (15 ml yogurt + 15 ml gula 60% + 15 ml sari jeruk). Uji organoleptik dilakukan menggunakan metode hedonik oleh 20 panelis semi terlatih terhadap parameter warna, aroma, rasa, dan tekstur. Analisis aktivitas antioksidan dilakukan dengan metode DPPH menggunakan spektrofotometer UV-Vis. Data dianalisis secara deskriptif dan menggunakan uji Multivariate Analysis of Variance (MANOVA). Hasil penelitian menunjukkan bahwa variasi formulasi yogurt dengan penambahan sari buah jeruk siam berpengaruh signifikan terhadap kualitas organoleptik yogurt (p 0,05) serta meningkatkan aktivitas antioksidan. Berdasarkan hasil uji organoleptik dan aktivitas antioksidan, Formulasi 1 merupakan formulasi terbaik dengan nilai rata-rata tingkat kesukaan panelis sebesar 3,75 dan nilai IC₅₀ sebesar 27,04
Identifikasi Jamur Rizosfer Tomat (Solanum lycopersicum L.) di Desa Buahan dan Pinggan, Kecamatan Kintamani Isnawati, Ida; Julyasih, Srie Marhaeni; Yuliastuti, Yuliastuti
BEST Journal (Biology Education, Sains and Technology) Vol 9, No 1 (2026): Juni 2026
Publisher : Program Studi Pendidikan Biologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/best.v9i1.12923

Abstract

The importance of the agricultural sector, especially tomato cultivation in the Kintamani region related to plant health and crop productivity. The decline in tomato production is suspected to be related to fungal pathogen attacks in the rhizosphere that affect plant health. The objective of this study was to identify the types of rhizosphere fungi present in two tomato plantation locations and to determine the relationship between the types of fungi and agricultural practices in each location. The research method was descriptive exploratory with systematic soil sampling at two different locations, followed by isolation and identification in the laboratory. The results showed that there were three genera of rhizosphere fungi at each research location identified in Buahan Village, including the genera Aspergillus, Penicillium, and Trichoderma, while in Pinggan Village, the genera Aspergillus, Penicillium, and Fusarium were found. In general, Penicillium was the most dominant genus at both research locations. While Pinggan Village was dominated by Fusarium, a pathogen that is harmful to plants, and the absence of Trichoderma. This difference is closely related to differences in agriculture practices such as fertilizer application and the use of chemical pesticides. The conclusion states that the pattern of rhizosphere fungal dominance is greatly influenced by soil management systems, which have an impact on rhizosphere health and tomato productivity. These findings provide an important scientific basis for the development of more environmentally friendly and sustainable tomato farm management strategies.
Co-Authors Al achmad, Ajhie Syachrul Qirom Andrianus Sembiring, Andrianus Arini, Dian Citra Manggalasari, Lena Dewana, I Gede Jose Idayati, Farida Isnawati, Ida Jantos, Anne Julyasih, Srie Marhaeni Ketut Srie Marhaeni Julyasih Koehler, Thomas Luh Putu Candra Apriliani NI LUH PUTU MANIK WIDIYANTI Ni Putu Dian Pertiwi, Ni Putu Dian Nurma Linda, Irma Oki Setyandito, Oki Rahayu, Diajeng Putri Ayu Rahmayani, Irma Razak, Nur Khadijah Rismawati Rismawati Rita Rachmawati, Rita Safitri, Mely Savitri, Ni Komang Rossa Sri Selfiyanti, Selfiyanti Serafin Wisni Septiarti Sutarto Sutarto Wijayanti, Yureana Winda Febrianti Sari Yusmalinda, Ni Luh Astria