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Articles 756 Documents
JENIS DAN SERANGAN HAMA LALAT BUAH (Bactroceradorsalis) PADA TANAMAN TOMAT (Solanumlycopersicum.L) DI DESA TARAITAK KECAMATAN LANGOWAN UTARA KABUPATEN MINAHASA Setlight, Monalisa Debora; Meray, Elisabet. R. M.; Lengkong, Maxi
COCOS Vol 2, No 6 (2019)
Publisher : COCOS

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ABSTRACT This study aims to determine: (1) the types of fruit flies that attack tomato plants and (2) the percentage of fruit fly attack Bactroceradorsalis on tomato plants in North LangowanSubdistrict, especially Taraitak Village.  The time of the study was carried out for two months, from March to April 2019. The research was conducted using a survey method at several tomato planting locations in  NorthLangowan sub-district. Sampling using the diagonal slice method is to determine randomly where to pick tomatoes sampled which was attacked by Bactroceradorsalis. On land determined 5 points that are the location in determining the plants observed by adjusting the shape or area of tomato plants planted by farmers. Based on the results of the study it can be seen that the percentage of B. dorsalis fruit fly pests attack. on tomatoes every week is different. The first week was 11.21 percent, in the second week it increased to 12.18 percent.  And in the third week also increased to 15.50 percent, then entered in the fourth week decreased to 9.08 percent and in the fifth week slightly increased to 9.44 percent. From the results of observations in the field of B. dorsalis fruit fly attack, the pests increased and decreased every week. Keywords : Fruit flies (Bactroceradorsalis), Tomato plants
MENGHITUNG RENDEMEN BIODIESEL DARI MINYAK JELANTAH HASIL PENGGORENGAN ABON CAKALANG Momongan, Alfin Mario; Ludong, Daniel P.M.; Pangkerego, Freeke
COCOS Vol 1, No 6 (2017)
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ABSTRACTCooked oil is a type of oil obained from frying remains of various household consumption. This oil contains free fatty acids produced by the reaction of oxdation and hydrolisis during frying, so that this oil is a house hold waste. UD. Trikora is a company that produced skipjack shredded meat and uses cooking oil for frying. The utilization of this cooked oil is an alternative problem solving of waste oil disposal and public health. The survey result indicated that this cooked oil was placed in the gallons and some of them was taken by the employers. Processing of this cooked oil into biodiesel as an alternative fuel diesel engine, is an altenative problem solving. Based on these reasons, a descriptive study was conducted to evaluate the biodiesel rendement of this cooking oil. The result showed that 78,8 % biodiesel was obtained from transesterification reaction of 500 mL cooked oil using 2 g NaOH and 100 mL ethanol as solvent.Keywords :Rendement, Wrapping oil, Transesterification
ANALISIS SIFAT KIMIA TANAH PADA TANAH YANG DI TANAMI TANAMAN TOMAT(Solanum Iycopersicum L)DI DESA TONSEWER MINAHASA ANALYSIS OF SOIL CHEMICAL PROPERTIES ON SOILS THAT ARE TOMATOUS PLANTS (Solanum Iycopersicum L) IN TONSEWER MINAHASA VILLAGE Tambanaung, Steven; Pioh, Diane D,; Kumolontang, Wiesje J. N.
COCOS Vol 1, No 2 (2019)
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ABSTRACT Soil  is a natural body that occupies most of the surface of planet Earth.  Soil as a medium for growing plants with various properties possessed. Tomato cultivation is not only on plantation land.  Soil chemistry concerns the composition of minerals, organic matter, and environmental factors. Components of soil chemistry include pH, organic C and essential nutrients. Soil reaction (pH) is a characteristic or parameter that shows acidic conditions in the soil. The taste of tomatoes is sweet - fresh sweetness that can provide freshness to the body. The optimal rainfall for tomato growth is 100-220 mm / rain with the ideal daily temperature, which is 25-30oC. Keywords: Soil Chemical Properties, Tomato Plants
KEANEKARAGAMANA JENIS SERANGGA TANAH DI HUTAN LINDUNG GUNUNG MAHAWU PROVISI SULAWESI UTARA Gay, Ujiman; Frans MSi, Dr.Ir. Terry M.; Memah MP, Dr.Ir. Ventje V.
COCOS Vol 1, No 4 (2018)
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ABSTRACT Soil insects are insects whose part or whole life is in the soil.  Soil insects are used as indicators to determine the stability of an ecosystem, so this study aims to see the effect of the diversity of soil types on forest strata.  The Mahawu mountain protected forest is located in Tomohon, North Sulawesi Provinc.  Forests with altitude of 800 m to 1372 m above sea level, with forest area of 40.44 hectares.  The diversity of soil types of insects in protected forests of mahawu mountain is included in the medium category (1> H <3).  The highest number of insect populations was found in the two-storey forest floor of Family Dermaptera = 34 heads, one-strata forest of Gryllidae Family amounted to 26 heads, and three-strata forest of Cerambycidae family amounted to 15 heads. Keywords : Soil insects.
ANALISIS KEBUTUHAN LUASAN RUANG TERBUKA HIJAU KOTA MANADO BERDASARKAN FUNGSI PENYEDIA OKSIGEN Rahman, Fadli; Kalangi, Josephus I.; Saroinsong, Fabiola B.
COCOS Vol 1, No 1 (2018)
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AbstractIncreased population indirectly resulted in the development of urban areas physically and tends to alter green open spaces into built areas to meet the needs and improve services to the population. As a result there is an increase in air temperature, decrease in ground water quality and urban air quality, and high noise level. The existence of urban green open space arrangement can overcome the development as well as to overcome the ecological impact of various disruption of human activities on the natural process in the City of Manado. Then to realize the ecological balance in the Manado city, there is need of green open space development approach that refers to the area and the need of oxygen. This study aims to calculate the area of green open space needed by Manado City based on oxygen supply function. Data analysis of green open space requirement based on area according to Law Number 26 Year 2007 and based on oxygen requirement using Gerakis formula (1974) modified by Wisesa (1998). The results show the green open spaces needed in Manado City area of 2953.45 ha. In meeting the needs of green open spaces Manado City based on the oxygen provider function then everyone is required to plant 3 trees, on an area of 25 m2.Keywords: green open space, oxygen demand, Manado City.
INVENTARISASI PARASITOID PADA HAMA TANAMAN JAGUNG (ZEA MAYS) DI KABUPATEN MINAHASA UTARA Mambu, Andreas P.; Salaki, C.I.; Wanta, N
COCOS Vol 7, No 6 (2016)
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ABSTRACTNatural enemies known as biological organisms affecting the regulation of pest populations or other organism. In a habitat or ecosystem tropical agriculture are usually found in many types of biological agents that naturally regulate the balance of nature. Insect parasitoids is small or as large as the host in deadly parasites and their hosts. Parasitoid requires only one host to perpetuate the cycle of life. This research was conducted in the District Kauditan and Dimembe, North Minahasa Regency, North Sulawesi province in July to September 2012. The aim of the study is to determine the type of parasitoid pests of corn crops in the district and sub-district Kauditan Dimembe North Minahasa Regency. The results of this study are expected to be the basic data that are important in developing biological control, in order to increase production of corn in North Sulawesi. Retrieval of data using a survey method in two districts, and each district selected two villages, namely Kauditan and Dimembe. Parasitoids on corn crop in the region is no different with Kauditan Tatelu. Almost all kinds of parasitoids were found on corn plants were also found in maize nutmeg in Kauditan. Parasitoids were found on the ecosystem corn plants totaling 16 individuals.Keywords: Corn, Parasitoid
EROSI PADA LAHAN HORTIKULTURA YANG DITANAMI WORTEL ( DAUCUS CARROTA L.) DI KELURAHAN RURUKAN KECAMATAN TOMOHON TIMUR Faizal, Cyndi S.; Sinolungan, Meldi; Tamod, Zetly; Sondakh, Tommy
COCOS Vol 2, No 3 (2013)
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ABSTRACTThe type of soil in the research site is Andisol soil with clay texture. The Andisol soil characteristics is a dark color / black, gray, dark brown to yellowish. The soil derived from volcanic ashes from the eruption of the volcano. Therefore, this type of soil are found in the area around the volcano's slopes. Like the soil in this research is located on the slopes of Mount Mahawu. Although it has many advantages, but the ground Andisol also has many disadvantages. Andisol ground weakness is due to the loose structure and crumbly, the type of soil is very easy take by rainwater. Therefore, in this research, land conservation efforts in the form of plastic mulching. In this study the use of plastic mulch as a treatment, more soil erosion results in the use of plastic mulch plots compared to not using plastic mulch. This is due to the use of plastic mulch, most of the rain water does not infiltrated into the ground because it was blocked by the plastic mulch, causing greater runoff. Large land runoff causes soil erosion more bigger easily transported.Keywords : Erosion, Soil Conservation Technique, Holticulture, Carrot (Daucus carrota L.)
POPULASI DAN SERANGAN LARVA Batocera hercules Boisduv (COLEOPTERA: CERAMBYCIDAE) PADA TANAMAN PALA DI KECAMATAN KAUDITAN KABUPATEN MINAHASA UTARA Mamonto, Ruknindi D.L Mamonto D.L; Dien, Moulwy Frits; Rimbing, Jimmy
COCOS Vol 1, No 1 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i1.19300

Abstract

ABSTRACTNutmeg plant is a superior plant of plantation sub-sector of North Sulawesi Province. Basically nutmeg plants are still a source of income farmers at the center of nutmeg production in North Sulawesi. In the development of plants Pala problem faced by farmers is borer stem borer Batocera Hercules. This study aims to determine the population and attack of B. hercules, on nutmeg plants in Kauditan District of North Minahasa Regency. The research used survey method on nutmeg plantation in Kauditan District of North Minahasa Regency. Servey result set three villages as sample location that is Karagesan village, Treman village and Watudambo village.Determination of sample plants was done randomly by selecting each of 20 trees in each village. Observation and sampling is done 4 times with interval once a week. Thus, the total sample crop at each sample/village location is 80 trees. To avoid double observation, the observed plants are marked at the base of the stem and are not observed again.The results showed that from 80 sample plants observed in each village in Kauditan District of North Minahasa Regency, the largest larvae population was found in the Karegesan village ie as many as 38 heads, then Treman village 7 and Watudambo Village 2. The highest percentage of affected plants was found in Keregesan Village which reached an average of 60.00%, then Treman village 26.25% and Watudambo Village 15.00%. The highest level of damage to the crop was found at the site of Karegesan village which reached an average of 2.11 holes / trees, Treman village averaged 0.37 hole / tree, Watudambo village on average 0.16 hole / tree.Keywords : Plant Nutmeg, Population of larva, Batocera hercules
PERILAKU PETANI DALAM PENGELOLAAN USAHATANI KELAPA DI DESA GOSOMA KECAMATAN TOBELO KABUPATEN HALMAHERA UTARA Tobelo, Paulus H.; Laoh, Esry O.H.; Timban, Jean F.J.; Baroleh, Jenny
COCOS Vol 6, No 10 (2015)
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ABSTRACT  This study aims to identify the behavior of farmers in managing coconut farm in the village of Gosoma, Tobelo district.  Coconut farming in this area is not something new for the community, since it has been done using conventional practices revealing their penetration in the culture in this place. This culture should be adjusted to the farmers? economic needs. This can be a barrier if farmers have limited knowledge and their attitudes are still very traditional.  This research was conducted in the Gosoma village, Tobelo District. Data were collected for three months, from August to October 2014. The data obtained are primary data and secondary data.  Primary data were obtained directly from a survey for farmers involved in managing coconut farming in the village of Gosoma.  The secondary data were  obtained from some government bodies related to this study. The author takes a sample using purposive sampling technique with sample size of 50% of the total population or 60 coconut farmers.  The results show that 1) Farmers still apply  traditional  coconut processing, and still have the tendency to maintain  the heritage. 2) Coconut farmers like coconut farming jobs because they are used to working as farmers.  There are a few who do not  like to be farmers because of occasionally insufficient income in this business. Until now the coconut farmers have not been formally trained, but have learned from practices shown by their ancestors.  They were able to maintain their plantations because of the finances they get from this business. 3) Almost all parts of the coconut tree can be used such as midrib, leaves and shells.  However, the processing or utilization of the waste of palm trees has not been optimally processed.  Some people argued that the waste is useless and worthless. The conclusions of the study are 1) The  farmers in the village of  Gosoma  still apply traditional ways in managing coconut farm. There are four reasons behind this.  Firstly, out of the 60 coconut farmer respondents in the village of Gosoma, there are only 15% who are actively doing family run coconut farming.  Secondly, most the the 60 farmer respondents still rely on the products of their coconut farm. Moreover, for the coconut farmer, agricultural land is everything that makes a reliable source of food, a highly valued property,   and the most important factor for social status. Thirdly, out of the 60 farmer respondents there are 45 respondents who have a very strong will to preserve tradition and social solidarity.   Coconut farming waste is used for food and other daily needs. Coconut tree trunks and palm fronds are used as firewoods in the kitchen. Coconut fiber and shell are usually sold. The coconut shell is sometimes used to heat traditional iron to press clothes.   Key words: farmers? behavior, managing coconut farm, Tobelo
INSIDENSI DAN SEVERITAS PENYAKIT BERCAK DAUN PADA TANAMAN KACANG TANAH DI DESA LOWIAN DAN LOWIAN SATU KECAMATAN MAESAAN KABUPATEN MINAHASA SELATAN Rori, Sammy S.N.; Manengkey, Guntur S.J.; Salaki, Christina L.; Rante, Caroulus S.
COCOS Vol 4, No 6 (2014)
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ABSTRACTSammy Sem Niclas Rori. Incidence and Severity of Leaf Spot Disease on Peanut Plants in the Lowian and Lowian One Village, Subdistrict Maesaan, District of South Minahasa. Under Guidence Ir Guntur S.J. Manengkey, MP as chaiman, Prof. Dr. Ir Christina L. Salaki, MS and Ir. Caroulus S. Rante, MS as member.This study aimed to determine the incidence and severity of leaf spot diseases on peanut plants. The experiment was conducted in the Lowian and Lowian One, Maesaan the District of South Minahasa Regency. The duration of the study which lasted for four months from September to December 2013. Research field using survey methods that further observation and communication with the peanut farmer. Furthermore, the distribution plots five sample plots in two different villages to be observed regarding the incidence and severity of disease caused by the cause of the peanut plant. In the laboratory microscopic observation of the shape of conidiophores of the fungus causes leaf spot disease. Things were observed in this study are: (i) symptoms of infected plants leaf spot disease-causing pathogens, (ii) the incidence and severity of disease. Observations in the field showed that the symptoms appear on peanut plants after infection by a disease that causes patches of chlorosis appear later developed into necrosis with an irregular round shape up. This phenomenon is located on the lower surface of the leaves and the leaves, leaf spot color ranging from light brown to brown or yellow halo blackish necrosis.Keywords: incidence, severity, leaf spot disease

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