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All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Buletin Hama dan Penyakit Tumbuhan BERITA BIOLOGI JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA
Soetrisno Hadi
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Environmental Science

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DAUR PATOLOGIS TEGAKAN HUTAN TANAMAN Acacia mangium Willd. Nuhamara, Simon Taka; Hadi, Soetrisno; Suhendang, Endang; Suhartono, Maggy T; Syafii, Wasrin; Achmad, Achmad
BERITA BIOLOGI Vol 9, No 1 (2008)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (858.66 KB) | DOI: 10.14203/beritabiologi.v9i1.804

Abstract

Heart rot on Acacia mangium Willd. forest stand is critical especially for mechanical or construction wood based purposes. Failure on understanding the nature and the way it get established into the tree stem may cause high economic consequences.Anticipating such a worse condition, studies on cull factor in relation to age was initiated. Eventually the study is aimed at healthy cutting cycles of the clear and purposely stand establishment. The study had been carried out at BKPH Parung Panjang, KPH Bogor. Following the cull factor measurement technique combined with the pathological rotation estimation procedures, it was found that the healthy volume was 0.0623 m and the cull factor was 31.25 %.The figures were at the age of nine years. Therefore, the pathological rotation cycle for the A. mangium stand in the area could be fitted at eight years, as being adopted so far.This is true, when the plantation is established for the production of wood, provided that the tending operation is optimal. Applying the United States Department of Agriculture (USDA) Forest Health Monitoring (FHM) indices, the general performance of the A. mangium forest stand in Parung Panjang is found to be in healthy criteria. The damage indices for all stand ages investigated varied from 2.77 (lowest) to 5.16 (highest) as compared to the 21.18 value, the possible highest FHM tree index.
PATOGENESIS HAWAR DAUN BIBIT PINUS MERKUSII YANG DISEBABKAN OLEH PESTALOTIA THEAE DI PESEMAIAN ., Sutarman; Hadi, Soetrisno; Suryani, Ani; ., Achmad; Saefuddin, Asep
JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA Vol 4, No 1 (2004): Maret, Jurnal Hama dan Penyakit Tumbuhan Tropika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2078.719 KB) | DOI: 10.23960/j.hptt.1432-41

Abstract

Pathogenesis of Needle Blight of Pinus merkusii Seedlings Incited by Pestalotia theae in The Nunery. The objectives of theiudy were to clarify the mechanism by which Pestalotia theae  incites the disease and the defense mechanism of the pine seedling  against the attack by the pathogen. The germination tube,2.9 µm in diameter, produced by the germinating conidiospore penetrated the leaf cells via the stomata, which were wider in diameter. The pathogen was able to produce pectinolytic and cellulolytic enzymes required for the degrading of the host cell wall components. The epidermis was covered-by a thick cuticulae layer. The activity of the peroxidase reduced in the cotyledon, the primary leaf and in the secondary leaf decreased, when the seedlings were 1-2,2-3, and >3 month old.
Pathogenicity of Rhizoctonia solani A Achmad; Soetrisno Hadi; Elis Nina Herliyana; Agus Setiawan
Jurnal Manajemen Hutan Tropika Vol. 5 No. 1 (1999)
Publisher : Institut Pertanian Bogor (IPB University)

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Pathogenicity of Rhizoctonia solani was studied by evaluating the ability of the pathogen to attack several ages of Pinus merkusii and Acacia mangium seedlings. Results showed that R. solani attacked P. merkusii from seed stage up to seven week-old seedlings, while eight week-old ones were free from the pathogen’s attack. On A. mangium, 16 day-old seedlings were uninfected by R. solani, while 12 day-old ones were still attacked by the pathogen. Pathogenesis of R. solani was also studied by evaluating the activities of cellulolytic and pectolytic enzymes produced by the fungi and compared them with the activities of the same enzymes produced by Fusarium oxysporum. Result showed that R. solani’s cellulolytic enzymes activity, reflected by the activity of C1-cellulase, was lower compared with that of F. oxysporum. On the other hand, R. solani was more intensive degrading pectin medium than F. oxysporum, such phenomenon reflected higher activity of pectolytic enzymes activity of R. solani compared with that of F. oxysporum. 
Anatomi Jaringan Kayu Terserang Penyakit Lapuk Kayu Teras Simon Taka Nuhamara; Soetrisno Hadi
Jurnal Manajemen Hutan Tropika Vol. 5 No. 1 (1999)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

A study was undertaken to determine the anatomical structures of decaying heartwood in the stem part of Acacia mangium Willd where the branch stubs were found. Sections of the decaying heartwood were made and the microscopical features were recorded. Compartmentalization of the decaying heartwood was observed and the walls of the compartment is characterized by the discoloration of the wood tissues suspected to be associated with the blocking of the vessels and pits, formation of tylosis, deposition of gum, and formation of axial parenchyma. The branch stub on the stem is known to be the entry point for different microorganisms leading to the heart-rot development by heartwood decaying fungi.
Epidemiologi Hawar Daun Bibit Pinus Merkusii yang Disebabkan oleh Pestalotia theae (Epidemiology of Needle Blight on Pinus Merkusii Seedlings Incited by Pestalotia theae) Sutarman .; Soetrisno Hadi; Asep Saefuddin; Achmad .; Ani Suryani
Jurnal Manajemen Hutan Tropika Vol. 10 No. 1 (2004)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

The objectives of the study are as follows: to know the interrelationships between the weather components as well as Pestalotia theae's aerial conidiospore population and the development of needle blight on Pinus merkusii seedlings, and to determine the effect of nursery site on the early development of the disease. Two week's average without interval model is the most reliable model to be used for determining the interrelationship between the development of the disease severity and the weather components. Light duration, rain fall, relative humidity and temperature are the weather components significantly affect the increase of the disease severity. The nursery in Pongpoklandak, Cianjur (26,5 - 30,5 oC; RH: 92-98 %), West Java, is the most optimal location for the development of the disease. To maintain the Disease Index at the most about 25 on seedlings over 6 months old, is the key factor for the successful management of needle blight on P. merkusii seedlings in the nursery.Keyword: Pinus merkusii, Pestalotia theae, epidemi, Indeks Penyakit
Mycorrhizae are symbiotic structure developed by the roots of plants and fungal mycelia. These mycorrhizae are often necessary for the growth of forest trees. This study was undertaken to determine the effect of the application of nitrogen and phosporus on the development of mycorrhizae in pinus merkusii. Andosol, collected in puncak, and latosol, collected in Darmaga, were used in this experiment. A seedling, transplanted into a pot containing 490 gr of dried soil, served as an experimental uni Chairil Anwar; Soetrisno Hadi; Sukandar Djokosuhardjo
Buletin Hama dan Penyakit Tumbuhan No. 3 (1979): Buletin Hama dan Penyakit Tumbuhan
Publisher : Buletin Hama dan Penyakit Tumbuhan

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Abstract

Mycorrhizae are symbiotic structure developed by the roots of plants and fungal mycelia. These mycorrhizae are often necessary for the growth of forest trees. This study was undertaken to determine the effect of the application of nitrogen and phosporus on the development of mycorrhizae in pinus merkusii. Andosol, collected in puncak, and latosol, collected in Darmaga, were used in this experiment. A seedling, transplanted into a pot containing 490 gr of dried soil, served as an experimental unit. Nitrogen ((NH4)2SO4) was applied at o ppm, 60 ppm, 120 ppm,
Co-Authors A Achmad ACHMAD . Achmad . Achmad Achmad Ani Suryani Ani Suryani ASEP SAEFUDDIN Chairil Anwar Elis Nina Herliyana Endang Suhendang Laksono Trisnantoro Maggy T Suhartono Simon Taka Nuhamara Sukandar Djokosuhardjo Sutarman . Sutarman . Wasrin Syafii dan Kurnia Sofyan Gustan Pari Buchari