Article Per Year (5 Year)
p-Index From 2021 - 2026
0.562
P-Index
This Author published in this journals
All Journal Jurnal Sylva Lestari
Casilac Jr, Cornelio Sacquiap
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Energy Environmental Science Materials Science & Nanotechnology

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
Disease Spectral Identification and Analysis on the Bark of Gmelina (Gmelina arborea Roxb) Ayag, Annie Onez; Padonat, Kyra Luminarias; Minguita, Kizza Eyn Sulima; Vergara, Joey Arles Ongue; Jusoy, Jade Capinpuyan; Casilac Jr, Cornelio Sacquiap
Jurnal Sylva Lestari Vol. 13 No. 1 (2025): January
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v13i1.1033

Abstract

Gmelina arborea is among the fast-growing Industrial tree plantation species currently being used as an alternative source of the decreasing supply of commercial timber from natural-growth forests. This study focuses on disease spectral identification and analysis of G. arborea bark using UV-Vis Spectrophotometry. Bark samples from both healthy and unhealthy bark with canker and death diseases were collected inside Caraga State University’s Main Campus. The methodology involved preparing bark extracts and measuring their absorbance over a wavelength range of 350 nm to 800 nm. The findings revealed distinct spectral signatures of healthy and unhealthy cankers, particularly with death disease, which exhibits a greater alteration in its spectral trend. The spectral trend of death-disease shows a drastic decrease in its absorption and the presence of troughs and peaks. On the other hand, the canker shows a decrease in its absorption. The severity of disease in the bark may potentially affect the behavior of the spectral trend; this is proven in the spectral trend of death-disease. The absorbance decreased, causing troughs at specific wavelengths as the presence of those diseases and their severity progressed. These findings show that spectral information from healthy and unhealthy bark can be used as an early detection method for tree diseases or stresses, thereby contributing to the conservation and sustainable use of G. arborea. Keywords: disease identification, healthy bark, Gmelina arborea, unhealthy bark, UV-Vis spectrometry
Bending Strengths of Large-leaf Mahogany (Swietenia macrophylla King) and Mangium (Acacia mangium Willd) Commercial Lumbers in Northeastern Mindanao, Philippines Cossid, Rey Naldoza; Torralba, Jan Michael Ampong; Clemente, John Harold Merantes; Villaflor, Chary Joyce Gabriel; Jandug, Catherine Mhae Buctuan; Casilac Jr, Cornelio Sacquiap
Jurnal Sylva Lestari Vol. 13 No. 1 (2025): January
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v13i1.1072

Abstract

Large-leaf mahogany (Swietenia macrophylla King) and mangium (Acacia mangium Willd) have been the preferred wood for furniture and cabinets for ages. S. macrophylla is famous around the world for the wood it provides. This study investigated the bending strength (modulus of rupture (MOR) and modulus of elasticity (MOE)) of S. macrophylla and A. mangium commercially available lumbers sold at roadside lumber dealers in northeastern Mindanao (Provinces of Agusan del Norte, Agusan del Sur and Misamis Oriental), Philippines. Four lumbers were acquired for each species in every province. A total of 12 lumbers per species were collected from the three provinces, or 24 sampled lumbers. These lumbers were further processed into a nominal dimension of 1.5 cm × 1.5 cm × 27.6 cm. All samples were oven-dried at 105 ± 3°C for 24 hours inside a laboratory oven until no more moisture could be removed. The 3-point test jig was fabricated and adapted to a kidizen science-free design but modified for this study. The results show no significant differences in bending strength at a 0.01 significance level among the three provinces and between species. Overall, bending strength is comparable across provinces and species. For S. macrophylla and A. mangium, Agusan del Norte obtained the highest MOR and MOE (54.707 MPa, 63.002 MPa). The MOE of S. macrophylla in Agusan del Norte was also high (6,825 MPa), but for A. mangium, Misamis Oriental province was the highest. Keywords: 3-point test jig, load deflection, mahogany, modulus of elasticity, modulus of rupture
Impact of Acacia mangium Willd. Plantation on Species Composition at Bugoy’s Peak, Barangay Bonbon, Butuan City, Philippines Calope, Reymark Moring; Villa, Nathaniel Buron; Palas, Louie Jay Fijo; Corbita, Victor Lobrigas; Casilac Jr, Cornelio Sacquiap; Cossid, Rey Naldoza; Perodes, Mark Angelo Palero
Jurnal Sylva Lestari Vol. 13 No. 3 (2025): September
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v13i3.1153

Abstract

Acacia mangium is a fast-growing tree species widely used in agroforestry and reforestation. However, it has raised concerns due to its potential ecological impacts when introduced outside its native range. This study assessed the effect of A. mangium plantations on species composition and seedling recruitment at Bugoy’s Peak, Barangay Bonbon, Butuan City, Philippines. A total of 13 plots were established using a nested quadrat design to evaluate tree diversity and regeneration patterns. Biodiversity indices and statistical tools were employed to analyze species abundance and composition within the plantation area. Results indicated that A. mangium did not exhibit signs of invasive dominance in the site. On the contrary, the presence of regenerating native species across plots suggests that local conditions may support coexistence and recruitment despite the presence of an introduced species. These findings highlight the importance of site-specific assessments in evaluating the ecological impact of non-native tree species and offer valuable insights for sustainable plantation management in biodiverse landscapes. Keywords: Acacia mangium, diversity assessment, invasive species, seedling regeneration, species composition
Co-Authors Ayag, Annie Onez Calope, Reymark Moring Clemente, John Harold Merantes Corbita, Victor Lobrigas Cossid, Rey Naldoza Jandug, Catherine Mhae Buctuan Jusoy, Jade Capinpuyan Minguita, Kizza Eyn Sulima Padonat, Kyra Luminarias Palas, Louie Jay Fijo Perodes, Mark Angelo Palero Torralba, Jan Michael Ampong Vergara, Joey Arles Ongue Villa, Nathaniel Buron Villaflor, Chary Joyce Gabriel