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Kota manado,
Sulawesi utara
INDONESIA
EUGENIA
Published by Universitas Sam Ratulangi
ISSN : -     EISSN : -     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
The aims of this journal is to provide a venue for academicians, researchers and practitioners for publishing the original research articles or review articles. The scope of the articles published in this journal deal with a broad range of topics, including: Agronomi, Protection, Soil, Forestry, Agroecotecnology.
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 24, No 3 (2018)" : 5 Documents clear
INVENTARISASI ANGGREK HUTAN DI TAMAN WISATA ALAM BATUPUTIH, KOTA BITUNG, SULAWESI UTARA Yubu, Amansyo; Pollo, H. N.; Lasut, M. T.
EUGENIA Vol 24, No 3 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.24.3.2018.22790

Abstract

ABSTRACT Orchid is the largest family that occupies 7-10% of flowering plants and has around 20,000 to 35,000 species. In Sulawesi, according to experts there are around 5000 species of plants that are not known with certainty about their spread and abundance. It has been estimated that approximately 253 endemic orchid species, around 80% of the total number of orchids. In the life stage, tropical orchid plants are epiphytic, with the root system attached to the tree, but does not harm the host tree. There are also those that grow geofitis, with other terms terresterial means to grow on the ground with roots in the soil. There are also those that are saprophytic, grow on the media of dried leaves and weathered wood that has rot into humus. To inventory forest species in Batuputih Nature Park, Bitung City, North Sulawesi. The study was conducted in January - February 2018. Data collection was carried out by exploratory methods. The types of orchids that were found during exploration in TWA Batuputih, which are sorted by the type most found on the three transects: namely Dendrodium sp with a total of 12 points at a height of 40-200 masl, Phaleonopsis amabilis with a height of 52 - 102 masl as many as 3 points while, Dendrodium indivisum with a number of 1 point, which is at an altitude of 136 masl, Nervilia aragoana as many as 10 points with an altitude of 10-84 masl, and Nervilia plicata found only 1 point, at an altitude of 52 masl. Of the five types consisted of 3 genera, namely Dendrodium, Phaleonopsis, and Nervilia, and 2 types of (habitats) terrestrial and epiphytes.Keywords: orchid, type and habitat of forest orchids
LAJU DEKOMPOSISI AWAL SERASAH POHON Palaquium obovatum, Spathodea campanulata dan Calophyllum soulattri DI HUTAN BRON WAREMBUNGAN KABUPATEN MINAHASA Rumambi, Juwita F.; Langi, M. A.; Nurmawan, Wawan
EUGENIA Vol 24, No 3 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.24.3.2018.22791

Abstract

ABSTRACT The availability of nutrient inputs for soil fertility in forests is very important to preserve in an effort to anticipate a decrease in land productivity. Litter decomposition is a process of destruction of organic matter (litter) into nutrients available in the soil. This study aims to determine and compare the rate of decomposition of Palaqium obovatum, Spathodea campanulata, and Calophyllum soulattri litter in Bron Warembungan Forest, Minahasa Regency. This study was carried out on the leaf litter of Palaqium obovatum, Spathodea campanulata, and Calophyllum soulattri. The method of decomposition rate data collection using 36 litter bags placed randomly (with experiments using a completely randomized design (CRD) with two factors namely tree type and duration of decomposition) on the forest floor taken every week for four weeks, followed simultaneously with temperature measurements and humidity. The results showed that of the three main tree species in Bron Forest, the highest decomposition rate was shown by leaf litter of Spathodea campanulata with an average of 15.49% per week, followed by Palaquium obovatum (11.74% per week) and then Calophyllum soulattri ( 3.07% per week). The decomposition process in the three leaf litter took place very quickly in the first week which can also be associated with the results of measurements of water content in litter.Keywords: tropical rainforest, decomposition of litter, leaf litter
ANALISIS KEMAMPUAN VEGETASI DALAM MEREDAM KEBISINGAN Putra, Imam Syah; Rombang, J. A.; Nurmawan, W.
EUGENIA Vol 24, No 3 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.24.3.2018.22660

Abstract

ABSTRACT Noise is one of the environmental problems that is often overlooked. To solve an environmental problems like this, vegetation is considered as the most effective and efficient noise damper. This research was conducted in Warembungan Village, Pineleng District, Minahasa Regency from May to July 2018, using the 3 factor factorial field experiment method in a Randomized Block Design, 3 main factors are vegetation canopy cover level, rotation per minute (RPM) rate of sound source, and distance level. The vegetation canopy cover level was determined purposively.The aim of this research to determine the capacity of various level of vegetation canopy coverage to reduce noise at various levels of noise. The role of vegetation in reducing noise depends on the coverage of vegetation canopy. At low level coverage of vegetation canopy, noise decreases about 1.25 dBA or 1.69% lower than the noise recorded without vegetation coverage. at the middle level coverage and high level coverage of vegetation canopy, the noises decrease about  2.46 dBA (or 3.32% lower) and 5.72 dBA (or 7.82% lower) respectively. Keywords: sound, noise, vegetation, canopy cover
PEMANFAATAN ENTOMOPATOGEN INDIGENOUS INDONESIA SEBAGAI KANDIDAT BIOPESTISIDA RAMAH LINGKUNGAN TERHADAP HAMA PENTING TANAMAN CABAI Salaki, Ch L; Pelealu, Jantje
EUGENIA Vol 24, No 3 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.24.3.2018.28791

Abstract

The purpose of this study was to obtain potential isolates of entomopathogenic bacteria and fungi that can be formulated into superior biopesticide candidates. The research methods used were 1) exploration of entomopathogenic bacteria and fungi from isolation of soil samples and infected insect pests, 2) rearing test insects and chili plant nurseries, 3) testing the killing power of entomopathogenic bacterial and fungal isolates against key pests of chilli plants and 4) pathogenicity testing of entomopathogenic bacteria and fungi to chilli plant pests. 104 soil samples were obtained from the field, consisting of paddy soil, plantation land, yard and forest soil with 21 isolates of Bacillus thuringiensis isolates. Sampling of entomopathogenic fungi was found in 17 insects attacked by entomopathogenic fungi. From the results of testing of all B. thuringiensis isolates, there were 12 isolates that could kill test larvae (S. litura) at a success rate greater than 50% 96 hours after preparation and 8 isolates that were able to kill the test nymph (M. persicae) at a success rate greater than 50% 96 hours after treatment. The results of testing the killing power of entomopathogenic fungi isolates were found to be the highest ability to kill S. litura larvae (93.3%), followed by MMITO isolates (86.7%) and MMSAM (80.0%). These isolates were isolates from the fungus Metarhizium anisopliae. The results of the selection of B. bassiana isolates in S. litura larvae were the best isolates of BEMSAM (86.7%) followed by BEMTTO isolates (83.3%). Whereas for testing the nymph Myzus persicae, mortality above 50% occurred through 2 isolates of Metarhizium anisopliae and 3 isolates of Beauveria bassiana. The pathogenicity test of Bacillus thuringiensis isolates showed that the highest mortality of Spodoptera litura in TTM isolates with a concentration of 5.02 x 105 with the fastest death time 28.2 hours after treatment. Whereas in the test of Myzus persicae, the highest mortality was in the TYM isolate with a concentration of 6.3 x 104 with the fastest death time was 22.4 hours after treatment.
Analisis Kualitas Vigin Coconut Oil (VCO) Produksi Tiga Kelapa di Kabupaten Minahasa Utara. Sumayku, Bertje R. A.; Tanor, Meity N
EUGENIA Vol 24, No 3 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.24.3.2018.31356

Abstract

This study aims to analyze the quality of virgin coconut oil (VCO) produced by Tiga Kelepa in North Minahasa Regency. VCO made from fresh coconut is one of the essential oils that are widely used for health. This research was conducted from March until May 2018. This research used a description method from the product of the VCO manufacture by stimulating method then continued with quality analysis in the laboratory of PT. Sucofindo and compared with the Indonesian National Standard (SNI) VCO quality. The results showed that the quality of "Vigin Coconut Oil (VCO)" "Tiga Kelapa" production in North Minahasa is better than the quality of Indonesian National Standards. The content of free fatty acids (FFA), water content, iodine number, color and aroma are suitable with SNI VCO. The composition of VCO fatty acids is dominated by Kaprilic Acid, Capric Acid, and Lauric Acid which are higher in content than SNI VCO. Lauric acid acid gives an analysis value of 57.78% Keywords: Three Coconut Production, Quality, Virgin coconut oil (VCO)

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