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Nasuiton, Lita
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Economics, Econometrics & Finance Immunology & microbiology

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Respon Perkecambahan Benih Bawang Merah (Allium ascalonicum L.) dengan Perlakuan Rendaman Cendawan Beauveria bassiana (Balsamo) Vuillemin: Response of Germination of Shallot Seeds (Allium ascalonicum L.) with Immersion Treatment of Beauveria bassiana (Balsamo) Vuillemin Nasuiton, Lita; Riduan Sembiring; Dedi Holden Simbolon; Magdalena Saragih; Swati Sembiring; Donatus Dahang; Rifa Diah Valahsya Sembiring; Rico Taruna Siregar; M. Fauzan Eren; Yolanda Febrima Tarigan
DINAMIKA PERTANIAN Vol. 42 No. 1 (2026): Jurnal Dinamika Pertanian Edisi April 2026
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/dp.2026.vol42(2).28157

Abstract

Background: The fungus Beauveria bassiana (Balsamo) Vuill is an entomopathogenic fungus widely used as a biological control agent against insect pests in plantation, food, and horticultural crops. Beyond its role as a biocontrol agent, B. bassiana has also been reported to enhance seed germination and early growth of shallot plants. Objective: his study aimed to determine the germination response of shallot seeds (Allium ascalonicum L.) to seed soaking treatment using B. bassiana at varying concentrations and soaking durations. Methods: TA field experiment was conducted from January to March 2026 using a factorial Randomized Complete Block Design (RCBD) with two factors: concentration (V) and soaking duration (P). Parameters observed included germination percentage, germination rate, shoot height, leaf number, leaf length, root length. Results: The results showed that the concentration of 15 ml/L (V3) gave the best effect on all parameters, while the soaking duration of 9 hours (P1) was optimal and not significantly different from longer soaking durations. The combination treatment of V3P1 (15 ml/L + 9 hours) produced the highest germination percentage (35% at 25 days after planting), the best germination speed (11.3 days), as well as superior shoot height and root length. The ability of B. bassiana to enhance growth is thought to be due to the production of phytohormones such as auxin and gibberellin. Conclusions: In conclusion, soaking shallot seeds in a suspension of B. bassiana at a concentration of 15 ml/L for 9 hours is recommended to improve seed viability and growth
Heterogenitas Tekanan Kekeringan dan Organisme Pengganggu Tumbuhan pada Agroekosistem Padi Sawah : Heterogeneity of Drought Stress and Plant Pest Organisms in Lowland Rice Agroecosystems Nasuiton, Lita; Magdalena Saragih
DINAMIKA PERTANIAN Vol. 42 No. 2 (2026): Jurnal Dinamika Pertanian Agustus 2026
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/dp.2026.vol42(2).30153

Abstract

Background: Drought and plant pests may reduce rice agroecosystem resilience, yet field-surveillance information is often reported separately. Objective: This study measured drought-affected rice area, identified plant pests in permanent observation plots, and interpreted initial location-level vulnerability in Hinai District, Langkat Regency, North Sumatra, Indonesia. Methods: An observational-descriptive approach used POPT-PHP surveillance records for 16–28 February 2026. Five villages were analyzed for drought indicators and three permanent plots for plant-pest indicators, including planted area, affected area, attack intensity, pest density, and natural-enemy density. Results: The villages covered 638 ha, of which 85 ha were affected, equivalent to 13.32%. The highest affected proportions occurred in Suka Jadi (23.08%), Muka Paya (21.13%), and Kebun Lada (16.67%), while the lowest occurred in Baru Pasar 8 (5.26%). Stem borer was recorded in Paya Rengas and Baru Pasar 8 with attack intensities of 2.6% and 3.7%, respectively; blast disease occurred in Suka Jadi at 2.9%. Pest density ranged from 0.26 to 0.33 individuals per 10 hills and natural-enemy density from 0.30 to 0.40 individuals per 10 hills. Conclusions: Results indicate spatial heterogeneity, and drought and pest pressures did not necessarily increase together; the findings support surveillance prioritization and adaptive rice management, but do not establish causality.
Co-Authors Dedi Holden Simbolon, Dedi Holden Donatus Dahang M. Fauzan Eren Magdalena Saragih Rico Taruna Siregar Riduan Sembiring Rifa Diah Valahsya Sembiring Swati Sembiring Yolanda Febrima Tarigan