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All Journal Jurnal Ilmu dan Teknologi Kayu Tropis

Tomy Listyanto

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Author-ID : 3654005

Agriculture, Biological Sciences & Forestry

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Physical and Mechanical Properties of 10-Year Old Superior and Conventional Teak Planted in Randublatung Central Java Indonesia Fanny Hidayati; Joko Sulistyo; Ganis Lukmandaru; Tomy Listyanto; Harry Praptoyo; Rini Pujiarti
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 13, No 1 (2015): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Tree breeding program has been conducted in Indonesia in order to produce more productive teak trees. Recently, from this program, superior clones (clone source) of teak have been selected for the establishment of the wider plantations. These clones show a good performance on growth characteristics such as stem diameter and tree height. However, it is important to evaluate wood quality of selected superior teak. Physical (heartwood percentage, wood color, basic density, and shrinkage per 1% change in moisture content) and mechanical (static bending strength and compressive strength) properties were investigated for 10-year old of two sources type of teak (superior and conventional) planted in Randublatung, Central Java, Indonesia. There was not significant different between superior and conventional teak was found in all physical and mechanical properties of both teak wood, suggesting that wood properties of both teak are similar at the same age. All trees are in juvenile phase as show by increasing of basic density from pith to bark. Basic density has positively correlation with all mechanical properties measured. It can be said that basic density can be used to estimate mechanical properties.Keywords: conventional teak, mechanical properties, physical properties, superior teak

Aktivitas Antirayap Ekstrak Daun Pepaya dan Kumis Kucing (Antitermite Activities of Leaf Extracts of Pepaya and Kumis Kucing) Abdul Azis; Tibertius A Prayitno; Ganis Lukmandaru; Tomy Listyanto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 16, No 1 (2018): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Antitermite activities of leaf hexane extract of cat whiskers (Orthosiphon sp.) leaves, ethyl acetate, and ethanol- toluene extracts of pepaya (Carica sp.) leaves were investigated in several concentrations (1, 5, 10, and 15%, weight based) that be impregnated to filter papers againts the dry-wood termites Cryptotermes sp. After impregnation, filter papers were dried into oven at 60 °C for 3 hours, then were tested to termites for 4 weeks. The results showed that treatment concentration could obtain the highest termites mortality level, no weight loss and the lowest damage level. Ethyl acetate extract of papaya leaves exhibited the highest termites mortality (91.2%) at concentration of 10%. This concentration also showed the lowest weight loss (0%) and the highest antifeedant activity (antifeedant coefficient of 100%). Ethyl acetate extract of papaya leaves exhibited the lowest of LC50 value (7844.20 μg ml-1 ). Antitermitic activity showed a trend more repellent than toxic. Fatty acid such as hexadecanoic acid, linolenic acid, octadecanoic acid and steroid compounds that detected by GC-MS were estimated to play a role as antitermite agents. Thus, the application of ethyl acetate extract of papaya leaves at concentration of 10% was recommended to the next experiment by using solid wood impregnation.

Evaluasi terhadap Stimulan Ethephon dalam Penyadapan Pinus merkusii (Evaluation on Ethephon Stimulant to Pinus merkusii Tapping) Ganis Lukmandaru; Sigit Sunarta; Tomy Listyanto; Kasmudjo Kasmudjo; Rini Pujiarti; Ragil Widyorini
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 16, No 2 (2018): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The aim of this study was to find out the effect of Ethephon, an ethylene releasing compound, in a combination with sulfuric acid resin production Pinus merkusii. The tested stimulants were ETRAT; SR4; 20% sulfuric acid; 20% sulfuric acid - Ethephon 2%; 3.3% sulfuric acid – 4.1% Ethephon; and sulfuric acid – 8.3% Ethephon. Trees without stimulant spraying were the controls. The results showed that for daily production, the first-day observation gave the highest value but decreased drastically after second-day observation in a varied degree depent on the stimulants. On the basis of accumulated production, the addition of Ethephon in a high or low level of sulfuric acid concentration exhibited significantly higher resin production compared to that of ETRAT; SR4; and 20% sulfuric acid stimulants as well as control trees. It increased resin production by 98.0-150.6% compared to control trees in class age of VII and increased by 140.9-227.1% in class age of IV stands. Moderate significant correlations (r=0.65) were observed between the values of resin production and tree diameter (controls) as well as between the values of resin production and tree diameter of trees treated by sulfuric acid stimulants (r=0.65-0.82).

Co-Authors Abdul Azis Fanny Hidayati Ganis Lukmandaru Harry Praptoyo Joko Sulistyo Kasmudjo Kasmudjo Ragil Widyorini Rini Pujiarti Sigit Sunarta Tibertius A Prayitno

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