Biogenic Silver Nanoparticles Synthesized Using Rivina humilis Leaf Extract Suppress Ganoderma boninense in Oil Palm Seedlings

Saragih, Wismaroh Sanniwati; Dewi, Rita Rosmala; Wagino, Wagino

doi:10.20961/carakatani.v41i4.123069

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Biogenic Silver Nanoparticles Synthesized Using Rivina humilis Leaf Extract Suppress Ganoderma boninense in Oil Palm Seedlings

Caraka Tani: Journal of Sustainable Agriculture · Vol. 41 No. 4 (2026) · hlm. 605–620

DOI: 10.20961/carakatani.v41i4.123069
ISSN: 2599-2570, 2613-9456
Terbit: 2026-10-19
Penerbit: Universitas Sebelas Maret
Bahasa: eng
Lisensi: creativecommons.org/licenses/by-nc/4.0

Abstrak

Basal stem rot (BSR) caused by Ganoderma boninense severely constrains global oil palm productivity, while conventional chemical fungicides often lack efficacy and cause negative ecological impacts, necessitating sustainable alternative control strategies. Therefore, this study aimed to biogenically synthesize silver nanoparticles (AgNPs) using Rivina humilis leaf extract (AgNPs-Rh) and evaluate their antifungal activity. AgNPs-Rh were characterized using UV-Vis spectroscopy, a particle size analyzer (PSA), gas chromatography–mass spectrometry (GC–MS), and Fourier-transform infrared spectroscopy (FTIR). In vitro antifungal activity was assessed via the poisoned plate method. In vivo efficacy was evaluated on oil palm seedlings inoculated with G. boninense at 4 months of age and subsequently treated with AgNPs-Rh at initial formulation concentrations of 250, 500, and 1,000 ppm. Results confirmed the successful biogenic synthesis, showing a surface plasmon resonance peak at 415 nm and an average hydrodynamic size of 77.3 nm with a polydispersity index of 0.308. FTIR and GC–MS analyses identified secondary metabolites, including phytol, as key stabilizing agents. In vitro assays demonstrated that 100 ppm AgNPs-Rh inhibited radial growth by 58.07%. In vivo, the 250 ppm application optimally suppressed BSR, reducing disease incidence and severity to 0% while significantly enhancing stem diameter and restoring total leaf chlorophyll content. In conclusion, AgNPs-Rh exhibit significant antifungal efficacy against G. boninense. This stable, biogenic formulation demonstrates strong potential as a highly promising, eco-friendly biocontrol alternative to synthetic fungicides for BSR management in oil palm nurseries.

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Sumber metadata: OAI-PMH (metadata jurnal) http://jurnal.uns.ac.id/carakatani/oai, pertama di-harvest 8 Nov 2026, terakhir terlihat 8 Nov 2026.

Metadata asli (oai_dc)

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	<dc:title xml:lang="en-US">Biogenic Silver Nanoparticles Synthesized Using Rivina humilis Leaf Extract Suppress Ganoderma boninense in Oil Palm Seedlings</dc:title>
	<dc:creator>Saragih, Wismaroh Sanniwati</dc:creator>
	<dc:creator>Dewi, Rita Rosmala</dc:creator>
	<dc:creator>Wagino, Wagino</dc:creator>
	<dc:subject xml:lang="en-US">Oil palm; Ganoderma boninense; Green syinthesis; Silver nanoparticles; disease-plant sciences</dc:subject>
	<dc:subject xml:lang="en-US">antifungal activity; basal stem rot; green synthesis; nursery disease management; phytopathogen control</dc:subject>
	<dc:description xml:lang="en-US">Basal stem rot (BSR) caused by Ganoderma boninense severely constrains global oil palm productivity, while conventional chemical fungicides often lack efficacy and cause negative ecological impacts, necessitating sustainable alternative control strategies. Therefore, this study aimed to biogenically synthesize silver nanoparticles (AgNPs) using Rivina humilis leaf extract (AgNPs-Rh) and evaluate their antifungal activity. AgNPs-Rh were characterized using UV-Vis spectroscopy, a particle size analyzer (PSA), gas chromatography–mass spectrometry (GC–MS), and Fourier-transform infrared spectroscopy (FTIR). In vitro antifungal activity was assessed via the poisoned plate method. In vivo efficacy was evaluated on oil palm seedlings inoculated with G. boninense at 4 months of age and subsequently treated with AgNPs-Rh at initial formulation concentrations of 250, 500, and 1,000 ppm. Results confirmed the successful biogenic synthesis, showing a surface plasmon resonance peak at 415 nm and an average hydrodynamic size of 77.3 nm with a polydispersity index of 0.308. FTIR and GC–MS analyses identified secondary metabolites, including phytol, as key stabilizing agents. In vitro assays demonstrated that 100 ppm AgNPs-Rh inhibited radial growth by 58.07%. In vivo, the 250 ppm application optimally suppressed BSR, reducing disease incidence and severity to 0% while significantly enhancing stem diameter and restoring total leaf chlorophyll content. In conclusion, AgNPs-Rh exhibit significant antifungal efficacy against G. boninense. This stable, biogenic formulation demonstrates strong potential as a highly promising, eco-friendly biocontrol alternative to synthetic fungicides for BSR management in oil palm nurseries.</dc:description>
	<dc:publisher xml:lang="en-US">Universitas Sebelas Maret</dc:publisher>
	<dc:contributor xml:lang="en-US">Directorate General of Research and Development, Ministry of Higher Education, Science, and Technology (MOHEST) of the Republic of Indonesia, the Applied Research - Model Output scheme</dc:contributor>
	<dc:contributor xml:lang="en-US">Research and Community Service (LPPM), Universitas Tjut Nyak Dhien</dc:contributor>
	<dc:date>2026-10-19</dc:date>
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	<dc:source xml:lang="en-US">Caraka Tani: Journal of Sustainable Agriculture; Vol 41, No 4 (2026): October; 605-620</dc:source>
	<dc:source>2599-2570</dc:source>
	<dc:source>2613-9456</dc:source>
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	<dc:rights xml:lang="en-US">Copyright (c) 2026 Caraka Tani: Journal of Sustainable Agriculture</dc:rights>
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