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Search results for , issue "Vol 7, No 7 (2021)" : 10 Documents clear
Peranan Perhutanan Sosial terhadap Pendapatan Masyarakat (Studi Kasus Proyek Penanaman di Desa Nanasi Kecamatan Poigar Kabupaten Bolaang Mongondow) Rondonuwu, Gabby Y.; Walangitan, Hengki D.; Sumakud, Maria Y.M.A.
COCOS Vol 7, No 7 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i7.36418

Abstract

ABSTRACT The aims of this study was to describe the role of forestry projects in this case the planting project in the context of forest rehabilitation in Nanasi Village, Poigar sub-district, Bolaang Mongondow Regency. The role of the project is evaluated based on the aspect of involvement as well as the amount of direct income received by the community participating in the project. This study uses an interview method with an open questionnaire model. Determination of respondents using purposive sampling technique with the number of respondents as many as 15 people. Furthermore, to analyze community involvement and the amount of income earned by project participants using descriptive analysis. The results showed that from the implementation of the project in the field, not everything went according to the technical design, but there were changes and adjustments according to the conditions in the field such as the land area in the technical design was 25 Ha and in practice the land area used was 27 Ha, fertilizer was not used for planting. cage/compost and maintenance for the second year is not carried out. The direct involvement of the community in this project as labor in the activities of transporting seeds to the planting site, preparing the planting area, followed by planting and maintaining plants. The results of the analysis obtained that the direct transfer value through work wages to the participating communities was Rp. 2,500,000 for 26 working days. The results of the interview obtained information that the income obtained through the investment project was used as business capital, school fees, living expenses and also as a cost to cover urgent needs. Keyword: social forestry, income, planting projects
KANDUNGAN HARA FOSFOR DAN KALIUM DI SEKITAR PERAKARAN TANAMAN UBI KAYU (Manihot Esculenta Cranz) Tampil, Noviane Stela; Kaunang, Djoni; Titah, Tilda
COCOS Vol 7, No 7 (2021)
Publisher : COCOS

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Abstract

ABSTRACTCassava is a food crop that is widely grown in the village of Salurang, Tabukan Selatan TengahDistrict. To develop this plant so that it produces better, it is necessary to conduct research onthe availability of nutrients around the roots. P and K elements are elements needed by cassavaplants, therefore it is necessary to research the availability of nutrients around the roots. Thisstudy aims to determine the nutrient content of phosphorus and soil potassium around the rootsof cassava. The benefit of this research is to determine the right fertilizer in to increase theproduction of cassava plants. The research method used a survey method with purposivesampling on cassava plants which have tubers and have not. Sample analysis using the dry soiltest (PUTK) version 1.0. Bogor Soil Research Institute The results of the analysis showed thatthe phosphorus nutrient content around the roots of the tuberous cassava plants ranged from lowto moderate, while potassium was low to high. Cassava plants that have not been rooted showthat the phosphorus content is moderate, while potassium ranges from moderate to high.Keywords: Phosphorus and Potassium Nutrients
PENGENDALIAN HAMA WALANG SANGIT (Leptocorisa acuta Thunb.) DENGAN MENGGUNAKAN PERANGKAP BANGKAI IKAN DAN KEONG PADA TANAMAN PADI Buida, Ruth Kristivoni; Kandowangko, Daisy; Montong, Vivi B.
COCOS Vol 7, No 7 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i7.36419

Abstract

BSTRACT Walang sangit is an important pest in rice plants. Because of the attack of walang sangit on rice crops in the flowering phase, farmers suffer losses because the grain of rice does not produce. The attack of pests that are high enough to cause rice crops to fail to harvest or reduce the quality of grain and the quantity of production. To prevent the attack of walang sangit on rice plants, it is necessary to control environmentally friendly walang sangit pests to suppress the impact of pesticide use by finding alternative substitutes, namely with carcass smell extracts, in this case using fish and conch carcasses. The purpose of this study is to find out the extent to which fish and conch carcasse traps can be used for pest control in rice plants located in Kiniar Village of Tondano Subdistrict during Minahasa Regency and implementation time from March to July 2021. This study used 2 treatments, namely fish carcass traps and conch carcasses, each treatment using a carcass mass weighing 150 grams, with 10 repeats. The results showed that both of these treatments can give good results where the pest walang sangit is attracted to both traps although in the treatment of fish carcass traps are able to attract more pests walang sangit with a value of 64.9 tails, and in the trap of conch carcass 38.7 tails. The results of the test analysis of the average difference between two free samples proved that the value of thitung > ttabel, which is 4.38 > 2,101, thus the hypothesis is proved to be H0 in rejected and H1 to be accepted. Keyword : Walang Sangit, carcass smelling accretion, fish and conch carcass traps
PEMANFAATAN KOMPOS DAN PHONSKA PLUS PADA LAHAN KERING MASAM TERHADAP PERTUMBUHAN, DAN PRODUKSI BAWANG MERAH (Allium ascalonicum L) DI KABUPATEN MINAHASA Supit, Joice.M.J.; Kamagi, Y.E.B.; Karamoy, L.Th.
COCOS Vol 7, No 7 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i7.36168

Abstract

ABSTRACTField Experiments on "Utilization of Compost and Phonska Plus in Acid Dry Land Against Growth, and Production of Shallots (Allium ascalonicum L.) in Minahasa Regency". While the objectives to be achieved in this study are a) Increasing the use of acid dry lands for activity of product agriculture; b) Determine the optimal compost and phonska plus dosage for agricultural business; c) Improve soil physical properties, soil chemistry and soil biology for acid dry lands to become productive land for agricultural business; f) Comparing the use of compost using phonska plus and non-phonska plus. The research was conducted in a field experiment by analyzing compost and soil in acid dry land before and after dolomite, phonska plus and compost treatment. The dolomite dosage 13,335 tonnes/ha (4 kg/3m2) for all pot. The compost dosage treatment consisted of Ko = 0 tonnes / ha (0 kg / 3 m2) as a control, K1= 15 tonnes / ha (2.7 kg / 3m2); K2= 30 tonnes / ha (5.4 kg / 3m2); K3 = 45 tonnes / ha (8.1 kg / 3 m2) and K4 = 60 tonnes / ha (10.8 kg / 3m2). The phonska plus treatment consisted of Po = 0 kg/ha (0 gr/ 3 m2) ; P1 = 400 kg/ha (120 gr/ 3 m2); P2 = 800 kg/ha (240 gr/ 3 m2); P3 = 1.200 kg/ ha (360 gr/ 3 m2). Onion plants as an indicator. Size of the plot / plot 2 m x 1.5 m (3 m2). Research time for 8 months. The research method was a factorial experiment with a randomized block design (RBD) and 3 replications. Statistical testing for tabulated data used Analysis of Variance (ANOVA) and Least Significant Difference Test Analysis (LSD). The results of the study showed that compost and phonska plus treatment had a significant effect on the growth and production of shallot plants. The dosage optimum of Phonska Plus treatment of 1.200 kg/ha and Compost treatment of 45 tons / ha provides maximum growth and production of shallots. Key words: Compose, Phonska Plus, Acid Dry Land, Shallots
PENGENDALIAN HAMA PENGGEREK BATANG CENGKIH (Hexamitodera semivelutina Hell.) MENGGUNAKAN INSEKTISIDA FIPRONIL DAN EMAMEKTIN BENZOAT DENGAN METODE INJEKSI LUBANG PADA BATANG Manengkey, Trisakti M. C.; Meray, Elisabeth R.M.; Rante, Caroulus S.
COCOS Vol 7, No 7 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i7.36421

Abstract

ABSTRACT This study aims to determine the effectiveness of the use of insecticides fipronil and emamectin benzoate by injection of stem holes in clove plants againstlarvae H. semivelutina. The results are expected to provide benefits for farmers in controllingpests H. semivelutina with fipronil and emamectin benzoate insecticides on clove plants by injection of holes in the stems. The research was conducted in a clove plantation area owned by farmers in Talaitad Village, Suluun Tareran District, South Minahasa Regency, North Sulawesi Province. The study lasted for 3 (three) months, from April to June 2021. This study used the Completely Randomized Design (CRD) method on clove plants belonging to farmers. Determination of plants to be applied to injection holes in the stem is done by looking at plants that are attacked bypests H. semivelutina by looking at the hoist holes that secrete liquid mixed with dirt on the clove plant. The results showed that the percentage of the effectiveness of the insecticide fipronil was 56%, which was not significantly different from that of emamectin benzoate, which was 40%, but was significantly different from the control by 0%. This study concluded that the use of fipronil and emamectin benzoate insecticides in the clove plantation area in Talaitad Village, South Minahasa Regency had a high enough killing power in controlling the clove stem borer H. semivelutina. The effectiveness of the application of Fipronil insecticide is 56% and Emamectin benzoate insecticide is 40% and as for suggestions in this study the use of Fipronil and Emamectin Benzoate insecticides is one way to control the pest population of H. semivelutina, besides that there are also various control methods that can be combined by using insecticides. However, its use must also be in accordance with the recommendations so as to reduce the occurrence of pollution and negative impacts on plants and the environment. Keywords : Effectiveness, Emamectin Benzoate, Fipronil, H. semivelutina.
PEMETAAN SIMPANAN KARBON TANAMAN PENEDUH JALAN WOLTER MONGINSIDI KOTA MANADO Agumanis, Vederica; Tasirin, Johny S.; Nurmawan, Wawan
COCOS Vol 7, No 7 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i7.35974

Abstract

AbstractThe aim of this research was to determine the variation in carbon storage of eachspecies, total carbon accumulation, and the contribution of carbon of each species to thetotal carbon accumulation in the Wolter Monginsidi street. Data collection was carriedout in December 2020, using the non-destructive method and analyzed using specificand general allometric formulas. The data was collected by means of a census of treeswith a diameter of ≥ 10 cm, which were found along Wolter Monginsidi street, startingfrom the Boboca Malalayang Monument to the Bahu Police Station. The results showedthat, Samanea saman had the highest carbon storage value of 50,10 tons/tree, followedby Ceiba pentandra and Garuga floribunda with carbon storage values of 4,09 tons/treeand 2,58 tons/tree. The accumulated total carbon storage of Wolter Monginsidi street is9.787,09 tons, with variations in the three street segments. The highest accumulation(2.222,72 tons/ha) was in the early segment. The average carbon storage each tree is14,18 tons/tree. Samanea saman contributed 71,4 %, Ceiba pentandra 5,8 % andGaruga floribunda 3,7 %, to the total carbon storage accumulation of WolterMonginsidi street.Keywords: Carbon, biomass, non-destructive, shade trees.
PATOGENISITAS JAMUR ENTOMOPATOGEN Metarhizium anisopliae Metch. TERHADAP KEPINDING TANAH Scotinophara coarctata, Fabricius PADA TANAMAN PADI SAWAH Tular, Marselina A. M.; Tulung, Max; Kaligis, James B.
COCOS Vol 7, No 7 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i7.36169

Abstract

ABSTRACT Rice (Oryza sativa L.) is one of the most important food crops for the Indonesian population because it is a high-carbohydrate staple food. S. coarctata is one of the important pests that attack at all stages of rice plant growth, and is capable of causing losses. One alternative that can be done is by using entomopathogens that are able to control pest attacks, one of which is M. anisopliae. This study was conducted with the aim of knowing the ability of the entomopathogen M. anisopliae to infect S. coarctata. The study was conducted using a completely randomized design (CRD) with 4 treatments and 4 replications, conducted control experiments using density concentration: P1 = 10 6 konidium / ml; P2 = 10 7 conidium/ml; P3 = 10 8 conidium/ml; P0 (control) = Water. Based on the results of observations after application at 2 – 3 DAS, it began to show mycelium growth on the surface of the insect's body which gradually began to change color to olive green. The mortality percentage of S. coarctata against M. anisopliae at a density of 10 8 caused 91%, followed by 10 7 causing 81%; and 10 6 caused 71% mortality at 14 HAS. The results of probit analysis showed that the value of LT50 at a density of 10 6 reached 9 days; 10 7 to 7.7 days; and 10 8 to 7.4 days. Based on the results of the study the percentage mortality is highest indensity of 10 8 konidium/ ml is equal to 91% mortality at 14 DAA. For the value of LT50, namely the death of 50% of the fastest insects found at a density of 10 8 only takes 7.4 days and LC50, which is at a concentration with a density of 10 7.5 conidium/ml. In accordance with the results of the research that has been carried out, it can be suggested that in controllingpests S. coarctata in lowland rice, it is better to use the entomopathogen M. anisopliae and to be applied by farmers, it is necessary to propagate it in the laboratory and then propagated in media ready for use by farmers. Keywords: Rice (Oryza sativa L.), Scotinophara. coarctata, and Metarhizium anisopliae.
SERANGGA-SERANGGA YANG BERASOSIASI PADA TANAMAN TOMAT (Lycopersicum esculentum Mill.) DI KELURAHAN KAMASI KOTA TOMOHON Pondaag, Brigita H.; Tairas, Robert W.; Kandowangko, Daisy
COCOS Vol 7, No 7 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i7.35975

Abstract

ABSTRACTInsects associated with tomato plants are both pests and beneficial insects such as predators,parasitoids, and some are useful as flower pollinators and destroyers of organic matter. The level ofstability of an agricultural ecosystem is determined by the structure of the trophic network and theinteractions between community components including herbivores (pests), carnivores, namelypredators and parasites. This study aims to inventory the insects associated with tomato plants inKamasi Village, Tomohon City. This research was conducted using two traps, namely the Pitfall Trap,the Yellow Sticky Trap which was installed every three days in one month of observation, and directcapture using the Insect Net. Pitfall traps are placed at 10 different points (using the zig-zag method)in 1 planting area. While the Yellow sticky trap is placed at 3 points of the planting area, namely theleft, right and center, the insects caught are labeled. Then it was taken to the laboratory of theDepartment of Pests and Plant Diseases, University of Sam Ratulangi Manado to be observed. Theresults of the study found that the insects associated with tomato plants in Kamasi Village, TomohonCity for Insect Nets were found to have a total of 13 types of insects, namely the Order Orthoptera,Family Acrididae, Order Coleoptera, Family Scarabaeidae, Staphylinidae, Chrysomelidae,Coccinellidae and Chantaridae, Order Diptera, Family Syrphidae. , Dolichopodidae and Asilidae,Order Hymenoptera Family Halictidae, Order Hemiptera Families Alydidae and Miridae, OrderLepidoptera Family Noctuidae. The Pitfall Trap was found to have 12 types of insects, namely theOrder Orthoptera, Family Gryllidae, Order Coleoptera, Family Scarabaeidae, Staphylinidae,Scolytidae and Ptinidae, Order Dermaptera, Family Forficulidae, Order Diptera, Family Drosophilidae,Order Hymenoptera, Family Formicidae, Order Hemiptera, Familiaridae, Colillomidae. Isotomidae andSminthuridae. The Yellow Sticky Trap was found to have 1 type of insect, namely the Order Diptera,Family Tephritidae. From the results of the study, it can be concluded that the insects associated withthe Tomato plant are 8 Orders, 24 Families consisting of insect pests, 11 Families from 5 Orders,insects as natural enemies (predators) 9 Families from 4 Orders, pollinator insects 1 Family from 1Order and decomposer insects of 3 Families of 1 Order.Keyword : insect, Association, tomatoes, garden
PENGGUNAAN Trichoderma sp TERHADAP PENYAKIT KARAT PUTIH Puccinia horiana Henn PADA TANAMAN KRISAN Ering, Frits J.; Assa, Berty H.; Makal, Henny V.G.
COCOS Vol 7, No 7 (2021)
Publisher : COCOS

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ABSTRACT Cultivation of horticultural crops such as ornamental chrysanthemums is a profitable business considering the excellent market potential for this plant. The main problem in chrysanthemum farming is the attack of white rust caused by a fungus (P. horiana). Trichoderma sp. is an antagonistic soil microorganism that naturally attacks pathogenic fungi and is beneficial for plants. This study aims to determine the use of Trichoderma sp against white rust that attacks chrysanthemum plants. This study was conducted using a completely randomized design (CRD) with 4 treatments and 4 replications. Based on the results of observations of symptoms of white rust disease (P. horiana) , the upper surface of the leaves is at first a yellow spot which gradually changes color to dark brown, then on the lower surface of the leaf there are pustules that are pink and gradually become dark brown. Over time it will turn white. The highest percentage of attacks was in treatment P4 (spraying) followed by P2 (watering), and P3 (watering and spraying). The conclusion that can be drawn is the use of Trichoderma sp. able to suppress white rust (P. horiana) on chrysanthemum with the best treatment in suppressing white rust (P. horiana) ie watering and spraying (P3) : 1.98% Observation data on the percentage of attacks after being tested with diversity analysis showed no significant difference between treatments. In accordance with the results of research that has been carried out, it is necessary for further research on the use of Trichoderma sp. against white rust (P. horiana) in other varieties of chrysanthemum. Keywords: Trichoderma sp, Puccinian horiana, Chrysanthemum Plants.
Pengaruh Mulsa Batang Jagung dan Strip Rumput terhadap Erosi Tanah pada Lahan Kering Daromes, Marsan S.B.; Mawara, Jody M.; Sinolungan, Meldi T.M.
COCOS Vol 7, No 7 (2021)
Publisher : COCOS

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ABSTRACTSoil conservation has a very important role in the prospect of land development to overcomethe problem of land degradation. This study aimed to determine the effects of corn stalk mulch andgrass strip toward soil erosion of dry land. Study about some research data from Nurdin (2012)entitled "Combination of Soil Conservation Techniques and Its Effect on Corn Yield and SoilErosion in Dry Land of Biyonga Sub-watershed, Gorontalo Regency", and Jaka (2017) entitled"Effect of the Treatments of Corn Stalk Mulch and Strip of Reinforced Terrace of Surface Runoff,Erosion and Farming Results" has been carried out on dry land farming of Keduang Sub-watershed, Bengawan Solo Watershed in Sendangsari Village, Batuwarno Sub-District, WonogiriRegency were then analyzed descriptively by the researcher. Results showed that BiyongaGorontalo Sub-watershed has an erosion value without treatment obtained from the calculations ofUSLE Method was 150.09 tons Ha-1year-1, whereas in Keduang Solo Sub-watershed the value ofsoil erosion on untreated soil was 12.77 tons Ha-1 year-1. The combination of given treatments wasthe provision of mulch and grass strips. The erosion category of both Biyonga and Keduang Sub-watersheds was classified as heavy, but with the application of vegetative soil conservationtechnology (mulch and grass strips) can reduce the level of land degradation even more and therate of erosion occurs.Keywords: mulch, grass strip, soil erosion, dry land

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