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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 2 (2018)" : 5 Documents clear
IDENTIFIKASI JENIS SERANGGA HAMA DAN TINGKAT KERUSAKAN PADA Diospyros Celebica Bakh. Mokodompit, Hendra S.; Pollo, H. N.; Lasut, M. T.
EUGENIA Vol 24, No 2 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.24.2.2018.22794

Abstract

ABSTRACT Diospyros celebica Bakh is luxury wood which is endemic to Sulawesi.  The Environment and Forestry Research and Development Istitute of Manado is implementing an ex situ conservation of D. celebica through planting it in  The Arboretum since  2012.  The D. celebica stand at the BP2LHK Arboretum in Manado was attacked by insects on the leaves, the leaf part is gnawed from the edge to the vein and midrib. The purpose of this study is to identify the types of insects which is pest to leaves of D celebica and calculate the level of damage caused. The study was conduct on the plot of D. celebica stands by census observation. Two types of insects were identified, namely leaf cutting bees (Megachile sp) and caterpillars from the order of Lepidoptera. The main insects that damage the leaves of D. celebica is leaf-cutting bee (Megachile sp) because this insect has no natural predators. The caterpillars of the order lepidóptera have a number of natural predators, such as Pycnonotus aurigaster, Centropus bengalensis, Phaenicophaeus calyorhynchus, Hypothymis azurea, and Oecophylla smaragdina. The results showed that the frequency of insect attacks on D. celebica leaves was 97.44%, there are 38 of 39 plant observed were attacked by insect. The intensity of insect attacks on stands of D. celebica is 11.54%, this result shows that pest control in stands is not yet necessary, since of the intensity of the attack is including minor damage.Keywords: insect, pests, Diospyros celebica Bakh., Intensity of damage
MODELING TUTUPAN LAHAN di DAS TIKALA BERDASARKAN KAPASITAS SALURAN SUNGAI TIKALA Telah, Heinsy A.J.; Rombang, J. A.; Walangitan, H. D.
EUGENIA Vol 24, No 2 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.24.2.2018.22805

Abstract

ABSTRACT Tikala river is the main channel of Tikala watershed. Tikala watershed covers an area of 9215,89 km² and the length of the main river is 23,73 km. The decline in Tikala watershed quality is marked by high fluctuations of river debit, the increase of erosion and sedimentation rates, and destructive flood. Comparing to floods caused by other rivers in Manado city, flood caused by Tikala river on the 15th January 2014 was the worst case. For this reason, research was conducted to analyze the capacity of river channels in three sampling spots, chosen through purposive sampling methods, and to model types of landuse suitable to the capacity of river channels. Results of river channel capacity analysis at 3 sampling spots using Manning's equation were 45,29 m3/s, 131,58 m3/s, and 36,39 m3/s. Five models of landuse were carried out for Tikala Watershed and the most suitable landuse model is the 4th type in which open area, dry agriculture, and 4.099 ha of dry agriculture mixed with shrubs were converted into an agroforestry system.Keywords: watershed, river capacity, modeling
PENGARUH RUANG TERBUKA HIJAU TERHADAP IKLIM MIKRO DAN KENYAMANAN TERMAL PADA 3 LOKASI DI KOTA MANADO Mala, Yordan P.; Kalangi, J. I.; Saroinsong, F. B.
EUGENIA Vol 24, No 2 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.24.2.2018.22658

Abstract

Microclimate is an important requirement for urban communities in creating outdoor thermal comfort. Micro climate as a benchmark in determining thermal comfort consists of 4 (four) elements which are, air temperature, air humidity, wind speed and solar radiation. Green open space area is one way to create comfortable micro climate for the community. The purpose of this study is to analyze microclimate and thermal comfort in 3 (three) green open spaces. The researcher used a purposive sampling method and chose the area with the same characteristics, namely UNSRAT Field, Tikala Field, and KONI Field. The results obtained were that the UNSRAT Field had the highest thermal comfort level with a percentage reaching 90% at 10:00 a.m. and 80% at 1:00 p.m. In addition, the micro climates in the three locations have differences, differences occur due to canopy area, tree species, plants, pavement type and building area around green open space.Keywords : microclimate, climate, open space, green open space
Ecological Restoration of A Logged-over Area in the South Bolaang Mongondow Rainforest Langi, M A; Saroyo, Saroyo
EUGENIA Vol 24, No 2 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.24.2.2018.28787

Abstract

This research has been conducted over the past 12 years and was aimed to gain understanding on the complex interactions involved in the maintaining and restoring biodiversity that might influence the flow of ecosystem services. The method used in this study is annual measurement and observation conducted through surveys into similar sites conducted in every November to December since 2004.  Stand structures consist of indicators of tree density, tree structure, crown coverage, and species composition.  Function and sustainability are describes through biodiversity (Shannon index), natural colonization (abundance), wildlife density and status (species richness), nutrient retention (litter fall and decomposition), soil and water quality (erosion and sedimentation, soil physics, water debit and clarity).  This study is still going on addressing an important question, that is “How long does it take for degraded forest land to achieve certain biodiversity or functional outcomes?” In relation to that, some indicators have begun to show certain patterns and tendencies.
PROSPEK PEMANFAATAN BIOPESTISIDA BAKTERI ENTOMOPATOGENIK ISOLAT LOKAL SEBAGAI AGEN PENGENDALI HAYATI HAMA TANAMAN SAYURAN Salaki, Ch L; Tarore, D
EUGENIA Vol 24, No 2 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.24.2.2018.28788

Abstract

The utilization efforts of entomopathogenic bacteria as an insecticide is still being developed. One of the pathogens with the potential to be developed as a source of insecticide is Bacillus spp. The study aims to determine the level of pathogenicity and the pathogenicity spectrum, as well as obtain isolates with high virulence against pests of vegetable crops to be used as a biopesticide candidates. Testing the power to kill larvae isolates of Bacillus thuringiensis against Crocidolomia pavonana, Plutella xylostella and Spodoptera litura performed by the method of Ohba and Aizawa. The results showed that of 21 local isolates B. thuringiensis, there were 15 isolates that could cause mortality of > 50% for the larvae of C. binotalis, 20 isolates against larvae of P. xylostella and 12 isolates against larvae of S. litura. LT50for treatment of B. thuringiensis in C. pavonana pests reached at 15.5 hours, at P. xylostella 10.2 hours and S. litura at 22.4 hours. Potential selected isolates based on their pathogenicity were then developed into biopesticide candidates to control pest Crocidolomia pavonana, Plutella xylostella and Spodoptera litura in vegetable crops

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