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Influence of Culture Medium and Mahogany Seed Extract on The Growth of Botryodiplodia sp. Isolate Causing Dieback on Jabon Seedling PENGARUH MEDIA KULTUR DAN EKSTRAK BIJI MAHONI TERHADAP PERTUMBUHAN ISOLAT Botryodiplodia sp. PENYEBAB MATI PUCUK Aji Winara; Achmad .; Syamsul Falah
Jurnal Silvikultur Tropika Vol. 5 No. 3 (2014): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.5.3.%p

Dieback on jabon seedling caused by fungi Botryodiplodia sp. decreased seedlings’ quality and nurseries economic benefits. Less studies on the control of dieback pathogen on jabon seedling used biofungicide from plant extract have been reported nowadays. Mahogany is one of the promising medicinal plants in Indonesia and has potential as an biofungicide. This research aimed to estimate the growth of Botryodiplodia sp. isolate on some culture medium and inhibitation by mahogany seed extract. The poisoned food technique was used to test the efficacy of mahogany seed extract on the isolate growth. The result showed that potatoes sucrose and potatoes dextrose medium most suitable for mycelium growth of the Botryodiplodia sp. isolate. The mahogany seed hot water extract inhibited the growth of Botryodiplodia sp. isolate with the highest growth inhibition was 41.85-59.90% at 50% extract. Microscopical examinaton showed the inhibition of mycelium growth was caused by the changes on hyphae morphology and growth direction which were shrinking and curling due to the cell wall degradation.Keywords : Botryodiplodia sp., inhibitation, mahogany seed extract, medium.

Potency of Biological Agent Trichoderma harzianum and Gliocladium sp. on Pathogenic Fungi Botryodiplodia sp. causes Dieback Disease of Jabon (Anthocephalus cadamba (Roxb.) Miq.) POTENSI Trichoderma harzianum DAN Gliocladium sp. SEBAGAI AGENS HAYATI Eti Artiningsih Octaviani; Achmad .; Elis Nina Herliyana
Jurnal Silvikultur Tropika Vol. 6 No. 1 (2015): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.6.1.%p

Botryodiplodia sp. is causes dieback disease of jabon (Anthocephalus cadamba (Roxb.) Miq). Dieback disease causes a decrease in the quality and economic value of jabon seedlings in the nursery. Research on control of the disease is still rare. Control of the disease is divided into three ways, namely chemical, physical, and biological. One biological control can be biological agents. Biological agents are used in this study is Trichoderma harzianum and Gliocladium sp. on in vitro test. The test results showed that T. harzianum antagonism with the direct method able to inhibit the growth of Botryodiplodia sp. with the average 52.53% and 35.99% respectively on PDA and Czapex Agar, while Gliocladium sp. able to inhibit the growth of Botryodiplodia sp. Average 46.46% and 28.51% respectively on the PDA and Czapex Agar for 7 days of observation. Results of antagonist test with indirect methods showed that the filtrate of T. harzianum and Gliocladium sp. has the ability to inhibit the growth of Botryodiplodia sp. at 13.42% and 10.25% PDB media significantly different from controls. T. harzianum and Gliocladium sp. have ability to inhibit the growth of Botryodiplodia sp. greatly.Key words : Botryodiplodia sp., Gliocladium sp., in vitro test, Trichoderma harzianum

Radial Growth and Biomass Production of Entomopathogenic Fungal Beauveria bassiana on Various Media PERTUMBUHAN RADIAL DAN PRODUKSI BIOMASSA CENDAWAN ENTOMOPATOGEN Beauveria bassiana PADA BERBAGAI MEDIA Dewi Ramdhania; Achmad .; Noor Farikhah Haneda
Jurnal Silvikultur Tropika Vol. 6 No. 1 (2015): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.6.1.%p

Three different types of solid and liquid media were used to determine radial growth and biomass production of Beauveria bassiana. Radial growth in solid media was observed for about 15 day after inoculation by measuring the fungal colony diameter every 24 hours. Maximum average growth is obtained in SDAY media (5.31 cm) followed by PDA(4.79 cm) and MEA (4.21 cm). While SDBY (0.24 g) as the liquid medium used for the biomass production after 4 weeks of incubation obtained the highest biomass followed by MEB (0.19 g) and PDB (0.18 g). The result showed that Sabouraud Dextrose with Yeast Extract is the most suitable medium for B. bassiana growth.Key words : Beauveria bassiana, media, radial growth, biomass production

Resistency of White and Red Jabon Seedlings (Anthocephalus spp.) to Botryodiplodia theobromae (Pat.) Causing Dieback Disease UJI RESISTENSI BIBIT JABON PUTIH DAN MERAH (Anthocephalus spp.) TERHADAP Botryodiplodia theobromae (Pat.) PENYEBAB PENYAKIT MATI.. Lola Adres Yanti; Achmad .; Nurul Khumaida
Jurnal Silvikultur Tropika Vol. 6 No. 2 (2015): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.6.2.%p

Dieback disease on jabon seedlings is caused by Botryodiplodia theobromae decreased seedlings quality and economic benefits of nurseries. This is still sparse research for resistance test between white and red Jabon. This research aimed to test B. theobromae attacked with non wounded and wounded stem infection methods in Jabons and to obtain the most resistance of Jabons to B. theobromae attacked. The results showed that the disease incidence and the disease severity on both control of Jabon seedlings were 0% and 0%. But on treatment, white jabon seedlings non-wounded and wounded stem infection were 30% and 100%. For red jabon seedlings non-wounded and wounded stem infection were 80% and 100%. The disease severity on white jabon seedlings non-wounded and wounded stem infection were 12% and 62%. For red jabon seedlings non-wounded and wounded stem infection were 16% and 38%. The disease incidence on red Jabon seedlings were wider than white Jabon seedlings, but for the disease severity, white Jabon seedlings were worse than red Jabon seedlings. Botryodiplodia theobromae attacked non-wounded and wounded stem infection on Jabons.Key words: nursery, stem infection methods, the disease incidence, the disease severity

Area of Damage and Distribution of Occurrence The Red Root Disease in Gunung Walat University Forest, Sukabumi LUAS SERANGAN DAN SEBARAN KEJADIAN PENYAKIT AKAR MERAH DI HUTAN PENDIDIKAN GUNUNG WALAT, SUKABUMI Achmad .; Elis Nina Herliyana; Deasy Putri Permatasari
Jurnal Silvikultur Tropika Vol. 7 No. 1 (2016): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.7.1.%p

Gunung Walat University Forest (GWUF) is known as education and research area. GWUF has a lot of homogen areas, therefore these area was attacked easily by disease, and of course this red root disease. Red root disease is caused by Ganoderma sp. and this disease can spread for plant to another plant in a lot of ways. The objectives of the study were to review the spreading of Ganoderma sp. that cause red root disease which attacked the forest tree in GWUF and also to identified species of Ganoderma sp. in visual way. The results showed that there were Ganoderma sp. in GWUF which spread in a lot of areas and also there were 7 species of Ganoderma sp. in Agathis and Pinus block, 5 species of them are attack Agathis block and 2 another species are attack Pinus block. Each Ganoderma sp. has different morphologies characteristic.Key words: Agathis sp., Ganoderma sp., GWUF, Pinus sp., red root disease

EFFECTIVENESS OF Beauveria bassiana AGAINST Coptotermes curvignathus Dewi Ramdhania; Noor Farikhah Haneda; Achmad .
Jurnal Silvikultur Tropika Vol. 7 No. 3 (2016): Jurnal Silvikultur Tropika (Suplemen Desember)
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.7.3.S19-S21

Termites are important pests to human life which can cause severe economic loss in Indonesia. Termites are not only attacking the wood products, but also the living plants with wide host distribution. Implementation of biological agents for termites control is one way to reduce the implementation of synthetic termiticide since it is considered to be more environmentally friendly and doesn’t cause resistance to termites. This research aimed to analyze the effectiveness of conidial density levels of Beauveria bassiana from various media types against Coptotermes curvignathus mortality. The research was designed using factorial completely randomized design by combining media types with conidial density levels. B. bassiana suspensions were made from three types of liquid media consist of Potato Dextrose Broth (PDB), Malt Extract Broth (MEB) and Sabouraud Dextrose Broth with Yeast Extract (SDBY). The suspension with density of 108, 106, and 104 conidia ml-1 from PDB, MEB, and SDBY media were applied to Coptotermes curvignathus. The results showed that all types of nutrients sources (PDB, MEB and SDBY) did not affect the virulence of B. bassiana conidial suspensions against C. curvignathus mortality. Nevertheless, C. curvignathus mortality were affected by the differences of conidial density levels from B. bassiana suspension.Key words: Beauveria bassiana, conidial density, media, mortality

AKTIVITAS ANTIFUNGI EKSTRAK DAUN PICUNG TERHADAP CENDAWAN Botryodiplodia theobromae PENYEBAB MATI PUCUK BIBIT JABON MERAH Antifungal Activity of Picung Leaf Extracts Against Botryodiplodia theobromae A Dieback Fungus of Jabon Merah Seedling L M. Alfin Agushara Bena; Achmad .; Syamsul Falah
Jurnal Silvikultur Tropika Vol. 8 No. 2 (2017): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.8.2.110-115

Invasion of Botryodiplodia theobromae as a dieback fungus on jabon merah (Anthocephalus macrophyllus) seedlings is a crucial issues. This pathogenic fungus needs to be controlled precisely. Phytochemical compounds of plant material is one alternative fungicides. Crude extracts of picung (Pangium edule) leaf in water and methanol solvent known to have antifungal potential. However, its activity against B. theobromae need to be revealed. In vitro assay aimed to measuring antifungal activity of water and methanol extracts of picung leaf on controlling growth of B. theobromae pathogenic fungus. Hot water extraction and maceration in methanol was conducted to obtain crude extract materials. In-vitro antifungal assay of water and methanol extracts of picung leaf was conducted by food poisoning method on Potato Dextrose Agar media. The results showed that water and methanol extracts of pangi leaf be able to suppress the growth of B. theobromae on the first day of observation, with the highest antifungal index reached 100% at concentration of 25mg/mL and 50mg/mL, respectively. This indicates that water and methanol extracts of picung leaf have antifungal activity. Generally, there was a trend of decrease in antifungal index over time.Key words: antifungal activity, Botryodiplodia theobromae, jabon merah, picung

KEEFEKTIFAN KITOSAN DALAM MENGENDALIKAN Botryodiplodia theobromae Pat. PENYEBAB MATI PUCUK PADA BIBIT JABON (Anthocephalus cadamba (Roxb.) Miq) Chitosan’s Effectiveness in Controlling Dieback by Botryodiplodia theobromae Pat on Jabon Seeding Desi Nurafida; Achmad .; Syamsul Falah
Jurnal Silvikultur Tropika Vol. 8 No. 3 (2017): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.8.3.170-176

Dieback disease by the fungus Botryodiplodia theobromae in Jabon seedlings (Anthocephalus cadamba) inhibits the regeneration of Jabon plant. Synthetic fungicides utilization to several problems such as residue on the environment and pathogen resistance. Chitosan is a potential natural compound used as an alternative to control plant disease.This research aims to examine the effectiveness of chitosan to control B. theobromae as causal agent of dieback on Jabon seedlings and to examine the effect of chitosan to control the viscosity of dieback disease on Jabon seedlings. The results showed that the chitosan solution can decrease the severity of disease in Jabon seedlings. However, it was different with the disease incidence rate parameter. Chitosan solution was not significantly affecting the disease because B. theobromae caused dieback symptoms on Jabon seedlings. The most effective treatment was chitosan solution with a concentration of 0.1% before inoculation with the severity of the disease by 25%. Chitosan solution viscosity was responsible in affecting the percentage of dieback disease in Jabon seeds. The higher the viscosity of chitosan, the higher the percentage of dieback disease attacks. The best viscosity to suppress the development of dieback disease on Jabon seedlings was 8.80 with 7.90% attack.Key words: Anthocephalus cadamba , Botryodiplodia theobromae, chitosan, dieback.

EVALUASI SISTEM AGROFORESTRI SENGON DENGAN PADI GOGO TERHADAP SERANGAN CENDAWAN Rhizoctonia sp. Evaluation of Agroforestry System between Sengon with Upland Rice to Invection of Rhizoctonia sp. Nofika Senjaya; Nurheni Wijayanto; Desta Wirnas; Achmad .
Jurnal Silvikultur Tropika Vol. 9 No. 2 (2018): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.9.2.120-126

Sengon is a fast growing species that popular to be cultivated in Indonesia. It can be planted in agroforestry system with agricultural crop such as upland rice (padi gogo). Agroforestry system between sengon and upland rice is vulnerable to fungi attack. Micro fungi that may attack upland rice and young sengon is Rhizoctonia sp. This research aimed to analyze the interaction of plants in agroforestry between sengon and upland rice as well as Rhizoctonia sp. attack. The experiment was performed in community forest in Cikarawang village which dominated by 2 years old sengon. Agroforestry system in cikarawang village affected significantly to harvest productivity of upland rice but not affected to growth of sengon. Statistical test performed also showed that Rhizoctonia sp. attack to upland rice did not affect the harvesting result, but only affected to plant morphology.Keywords: dimension, fungi, rice, productivity

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