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All Journal Jurnal Fitopatologi Indonesia JURNAL AGROTEKNOLOGI Jurnal Agro JURNAL PENDIDIKAN TAMBUSAI PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Medium : Jurnal Ilmiah Fakultas Ilmu Komunikasi
Sundari, Dini
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Agriculture, Biological Sciences & Forestry Arts Humanities Economics, Econometrics & Finance Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Medicine & Pharmacology Public Health Social Sciences

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Journal : Jurnal Agro

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Rhizospheric Bacillus spp. as biocontrol agents against maize downy mildew and growth promoters Mugiastuti, Endang; Manan, Abdul; Soesanto, Loekas; Primayuri, Deviana; Sundari, Dini
Jurnal AGRO Vol. 12 No. 1 (2025)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/j.agro.45887

Abstract

Downy mildew is one of the major patogen limiting maize productivity in Indonesia. Effective mitigation strategies are essential due to the significant yield losses it causes. Biological control is an environmentally viable alternative method of disease management. Bacillus spp. are biological control agent capable of producing metabolic chemicals that can inhibit plant infections, hence holding potential for downy mildew management. This study aimed to evaluate the effectiveness of Bacillus spp. from the maize rhizosphere to manage downy mildew and promote maize plant growth. The research employed a completely randomized block design, consisting of four treatments and six replications. The treatments comprised Bacillus amyloliquefaciens BB.R3, B. subtilis BK.R5, Bacillus spp. BK.R9, fungicides treatment (metalaxyl), and control group for comparison. The observed variables included spore germination, incubation period, disease incidence, disease severity, Area Under Disease Progression Curve (AUDPC), number of leaves, plant height, fresh shoot weight, and fresh root weight. The findings revealed that B. amyloliquefaciens BB.R3, B. subtilis BK.R5, and Bacillus spp. BK.R9 effectively inhibited downy mildew by decreasing spore germination by 80.55-100%, prolonging the incubation period, and inhibiting disease incidence by 20.37-53.70%, disease severity by 25.64-62.56%, and AUDPC by 22.21-63.37%. B. amyloliquefaciens BB.R3 can enhance plant growth by augmenting root weight by 122.63% and maize plant weight by 80.26%.   ABSTRAK   Penyakit bulai merupakan salah satu penyakit utama yang menghambat produksi jagung di Indonesia. Upaya pengelolaan penyakit bulai perlu dilakukan mengingat besarnya kehilangan yang ditimbulkan.  Pengendalian hayati merupakan salah satu alternatif pengendalian yang ramah lingkungan dan berkelanjutan. Bacillus spp. adalah bakteri yang mampu menghasilkan senyawa metabolik, dapat mengendalikan pathogen tanaman sehingga berpotensi sebagai pengendali penyakit bulai.  Penelitian ini bertujuan untuk mengetahui kemampuan Bacillus spp. asal rizosfer untuk mengendalikan penyakit bulai dan mengoptimalkan pertumbuhan tanaman jagung. Penelitian menggunakan Rancangan Acak Kelompok Lengkap, dengan 4 perlakuan dan 6 ulangan. Perlakuan meliputi Bacillus amyloliquefaciens BB.R3, Bacillus subtilis BK.R5, Bacillus spp.. BK.R9, serta fungisida (metalaksil) dan kontrol sebagai pembanding. Variabel yang diamati meliputi perkecambahan spora, masa inkubasi, kejadian penyakit, intensitas penyakit, AUDPC, jumlah daun, tinggi tanaman, bobot tanaman segar, dan bobot akar segar. Hasil penelitian menunjukkan B. amyloliquefaciens BB.R3, B. subtilis BK.R5, Bacillus spp.. BK.R9 mampu menekan penyakit bulai jagung, dengan menurunkan perkecambahan spora 80,55-100 %, menunda masa inkubasi, menurunkan kejadian penyakit sebesar 20,37-53,70 %, intensitas penyakit sebesar 25,64-62,56%, dan AUDPC sebesar 22,21-63,37%. B. amyloliquefaciens BB.R3 dapat memacu pertumbuhan tanaman, dengan meningkatkan bobot akar sebesar 122,63 % dan bobot tanaman jagung sebesar 80,26%.   Kata kunci: Bacillus, jagung, pengendalian hayati,  Peronosclerospora maydis, ramah lingkungan
Nanoemulsion biopesticide formulated form Zingiber Purpureum extract and patchouli oil distillation waste for controlling bacterial leaf blight on rice Sundari, Dini; Sri Suharti, Woro; Istiqomah, Dina; Nur Amila, Alya
Jurnal AGRO Vol. 12 No. 2 (2025)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/j.agro.50001

Abstract

Bacterial leaf blight, caused by Xanthomonas oryzae pv. oryzae (Xoo), is one of the most destructive diseases in rice crops. This study aimed to assess the efficacy of nanoemulsion biopesticides derived from bangle extract (Zingiber purpureum) and patchouli oil distillation waste in controlling Bacterial Leaf Blight (BLB) in rice. The experiment used a Randomized Block Design with six replications, including a control, nanoemulsion biopesticide concentrations of 500, 1000, 1500, and 2000 ppm, and a bactericide as a positive control. The observed parameters included pathology (incubation period, disease intensity, infection rate, and area under disease progression curve) and agronomic traits (plant height, number of tillers, number of panicles, number of grains, 100-grains weight, root and shoot dry weight). The results showed that the application of biopesticide nanoemulsions, although it does not prolong the incubation period, was able to reduce disease intensity up to 8.7% compared to the control at a concentration of 2000 ppm and also lowered the rate of disease infection. The treatment did not have a significant effect on vegetative growth, however nanoemulsion biopesticides at concentrations above 1000 ppm increased production components, including grain number by 32% and 100-grain weight by 6.1% compared to the control. This study demonstrates that the nanoemulsion biopesticide formulation of bangle extract and patchouli oil distillation waste has the potential to be used as an environmentally friendly biopesticide to control Bacterial Leaf Blight while simultaneously increasing rice productivity. ABSTRAK Hawar daun bakteri yang disebabkan oleh Xanthomonas oryzae pv. oryzae merupakan salah satu penyakit paling merusak pada tanaman padi. Penelitian ini bertujuan mengevaluasi efektivitas biopestisida nanoemulsi berbahan ekstrak bangle (Zingiber purpureum) dan limbah penyulingan nilam dalam menekan hawar daun bakteri pada padi. Percobaan dilakukan dengan Rancangan Acak Kelompok yang terdiri atas enam perlakuan (kontrol, biopestisida nanoemulsi dengan konsentrasi 500, 1000, 1500, dan 2000 ppm, serta bakterisida sebagai kontrol positif) dengan enam ulangan. Parameter yang diamati meliputi aspek patologi (masa inkubasi, intensitas penyakit, laju infeksi, dan area under disease progression curve) serta aspek agronomi (tinggi tanaman, jumlah anakan, jumlah malai, jumlah biji, bobot 100 biji, bobot kering akar dan tajuk). Hasil penelitian menunjukkan bahwa meskipun tidak memperpanjang masa inkubasi, aplikasi nanoemulsi biopestisida tetapi mampu menekan intensitas penyakit mencapai 8.7% dibandingkan dengan kontrol pada konsentrasi 2000 ppm serta menurunkan laju infeksi penyakit. Perlakuan tidak menunjukkan perbedaan respon terhadap pertumbuhan vegetatif, namun biopestisida nanoemulsi dengan konsentrasi di atas 1000 ppm meningkatkan komponen produksi berupa jumlah biji sebesar 32% dan bobot 100 biji mencapai 6,1% dibandingkan dengan kontrol. Penelitian ini menunjukkan bahwa formulasi biopestisida nanoemulsi ekstrak bangle dan limbah nilam berpotensi digunakan sebagai biopestisida ramah lingkungan untuk mengendalikan hawar daun bakteri sekaligus meningkatkan produktivitas padi.
Co-Authors Abdul Manan Ani Widiastuti, Ani Anwar, Ahmad Zain Arif Wibowo Arista, Milda Wahyu Arlyna Budi Pustika Aulia, Nicky Az Zahroh, Zulfa Dalimunthe, Ahmad Amin Dhini Aulia Endang Mugiastuti Harahap, Karlina Hasibuan, Assyifa Padiska Hidayati, Wilujeng Istiqomah, Dina Lathifah, Azhara Dwi Loekas Soesanto Maifira, Hafiza Nur Amila, Alya Primayuri, Deviana Purba, Dumaris Priskila Ringgo Eldapi Yozani Sevirasari, Nindy Simangunsong, Dinda Azalia Sri Suharti, Woro Tri Joko Welly Wirman