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Articles 7 Documents
Search results for , issue "Vol 3, No 1 (2021): Edisi Februari-April" : 7 Documents clear
Studi Riap Mahoni (Swietenia Macropylla King) Area Kegiatan Rehabilitasi Daerah Aliran Sungai (Das) Desa Lolan Kabupaten Bolaang Mongondow M, Makai.; H. D, Walangitan.; Kainde, R.
COCOS Vol 3, No 1 (2021): Edisi Februari-April
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i1.31821

Abstract

ABSTRAK The basic principle of sustainable forest management is that forest harvest is the same as the forest increment itself, so increment information is very important. Increment is the increase in diameter, basal area, height, volume or value of a tree or stand over a certain period of time. Mahogany tree (Swietenia Macropylla King) can survive in all types of soil, so this plant is very suitable for planting in the context of land rehabilitation activities. This research was conducted in the Watershed Rehabilitation Area (DAS) in Lolan Village, Bolaang Timur District, Bolaang Mongondow Regency in October - November 2018. This study aims to describe the initial increment of mahogany stands (Sweitenia macrophylla King). The technique of determining tree samples using purposive sampling method by selecting trees whose growth has never been disturbed by either pests or broken due to wind. The variables observed were diameter, height, and volume increments. The results showed that the average height and diameter of mahogany trees in blocks A1 & A7 when the plants were 16 months (1.25 years old) were 3.24 m for height and 0.033 m, respectively. The average height increment was 2.594 m / yr, the mean diameter increment was 0.026 m / yr. Furthermore, the average volume increment is 0.00169 m3 / year. Key words: Riap, land rehabilitation, plantation forest
KEHILANGAN TANAH SAAT PANEN PADA TANAMAN BAWANG DAUN (Allium fistulosum L) Mukuan, Nehemia Angeli; Kamagi, Yani E. B.; Luntungan, Jooudie N.
COCOS Vol 3, No 1 (2021): Edisi Februari-April
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i1.31906

Abstract

ABSTARCT The purpose of this study was to determine the amount of soil transported or involved in the roots and stems of leeks at harvest time. This research was conducted to determine the amount of soil involved when the leek plants were harvested in the agricultural land of Rurukan, East Tomohon sub-district. This plant is a potential commodity and important for the local community because it supports the economy of the farming community. This research uses descriptive research methods (Anonymous, 1984). The variables observed were root weight (Xa) and leek stem diameter (Xb) to the amount of soil transported (Yt) with a total of 40 samples with the multiple linear regression analysis method at the 5% level (Sugiarto, 1992). The results showed that the amount of soil transported on one leeks plants was 4.1064 gr with an estimated value based on multiole regression equation, namely: Yt = 0.3253 + 3.2661Xa + 0.5150Xb, at R2 = 0.6292. Key words: Loss of Soil, Leek
PENGGUNAAN PUPUK KOMPOS AKTIF Trichoderma sp DALAM MENINGKATKAN PRODUKSI TANAMAN CABAI RAWIT (Capsicum frutescens L.) Tigahari, Jostefin; Sumayku, Bertje; Polii, Maria
COCOS Vol 3, No 1 (2021): Edisi Februari-April
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i1.32443

Abstract

ABSTRACTCayenne pepper (Capsicum frutescens L.) is a fruit vegetable, which is needed by all levels ofsociety, because apart from being a spice for cooking and medicinal plants it is also a source oflivelihood. Environmental factors that have the potential to influence the development and yield ofchili plants include the high rainfall that is unpredictable throughout the year. The results of severalstudies indicate that the active compost of Trichoderma sp. can help growth and good results forplants. Trichoderma sp. is one of the biological control agents that have been widely used to controlplant pathogenic microbes. This research aims to study the growth and production of chili plants fedwith active compost Trichoderma sp. This research has been carried out at the Kalasey Center forFood Crops and Horticulture in North Sulawesi for 3 months from March to June 2018. The tools tobe used are: hoes, shovels, ropes, sticks, scales, sacks, writing instruments and cameras. Materialsto be used are: Nirmala's cayenne pepper seeds, soil, water, polybags, active compost Trichodermasp. and label paper. The research design was arranged in a randomized block design (RBD) with 6treatments repeated 3 times. Trichoderma sp. Active compost dosage treatment are: T0 = withoutactive compost treatment Trichoderma sp. T1 = active compost of Trichoderma sp. 50 g / 10 kg ofsoil T2 = active compost of Trichoderma sp. 100 g / 10 kg soil T3 = active compost of Trichodermasp. 150 g / 10 kg soil T4 = active compost of Trichoderma sp. 200 g / 10 kg of soil T5 = activecompost Trichoderma sp. 250 g / 10 kg of soil. Each treatment used 6 polybags with each polybagcontaining one plant. So the total number of polybags is 108 polybags. Data were analyzed usingAnalysis of Variance (Anova) to see the effect of treatment. If the treatment shows a significanteffect, the analysis is continued using the 5% LSD test. Based on the results obtained in thisexperiment, it can be concluded that the application of active compost Trichoderma sp 250 gramshas the best effect on plant height, number of leaves, flowering time, number of fruits, wet fruitweight and production of cayenne pepper.
POTENSI PEMANFAATAN HASIL HUTAN BUKAN KAYU POHON AREN DI KELURAHAN KAYAWU KOTA TOMOHON Saragih, Cindy Eva; Lasut, Marthen Theo; Pangemanan, Euis F. S.
COCOS Vol 3, No 1 (2021): Edisi Februari-April
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i1.31907

Abstract

ABSTRACT POTENTIAL UTILIZATION OF NON-AREN FOREST PRODUCTS IN KAYAWU VILLAGE, TOMOHON CITY Sugar palm is one of the HHBK that is widely used, one of which is palm sugar, or also known as "saguer" in the Manado language. Almost all parts of the palm tree can be used. There are many production products that can be used, for example young palm fruit is processed into fro, sap water for making brown sugar and vinegar and starch / flour in the stems for making various foods. This study aims to determine the potential of the sugar palm (Arenga pinnata, Merr.) as a non-timber forest product as utilized by villagers of Kayawu. The research was conducted in November 2019 in Kayawu Village, Tomohon City, North Sulawesi. This research used a purposive sampling method, which is the technique of selecting respondents that fulfill certain criteria and interviewing them using a questionnaire. The results of the study, it can be concluded that the use or processing of palm sugar in Kayawu Village is rock sugar (74.41%), then rat stamp (20.93%) and sugar ant (4.65%). Keywords : HHBK, Palm Sugar, Brown Sugar
MORFOLOGI DAN PERILAKU HAMA Crocidolomia pavonana PADA TANAMAN KUBIS Paat, Frangky J.; Pelealu, Jantje
COCOS Vol 3, No 1 (2021): Edisi Februari-April
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i1.31819

Abstract

ABSTRACT This study aims to determine the morphology and behavior of Crocidolomia pavonana pests. The research was conducted at the Laboratory of Entomology and Plant Pests, Faculty of Agriculture, Sam Ratulangi University. This research used descriptive method and analyzed using excel and SPSS 19 software. Observations included size, shape, larva color, behavior, development stage of Crocidolomia pavonana. The measurement results of the larval instar of C. pavonana, first instar is 1,84-2,51 mm, second instar is 5,1-6,82 mm, the size of the third instar larva is 11,97-15,85 mm, and the size of the fourth instar larvae is 14,25-18,7 mm. Observation period of the larval instar of C. pavonana, first instar was 3-6 days, second instar period was 3-6 days, third instar period was 2-5 days, and fourth instar period was 3-8 days. The size of the egg group is 3-5 mm. Female body size is longer than male imago. The average female body size is ± 9-11,6 cm. The average male body size was 6,7-9,2 mm. The time period for hatching groups of eggs is 3-4,5 days. The results of the morphological study of Crocidolomia pavonana pest showed that the adult characteristics of the head color are orange, body color is cream to slightly yellow, wing color is brown with black spots, laying eggs under the leaves. Eggs are placed in groups and arranged, placed under the leaves in a group of eggs, greenish yellow and shiny, when they hatch, they are older and slightly reddish, hatch 4-5 days after laying. The larvae have four instars. When the first instar is still in groups and eats the leaves where the larvae hatch so that it forms like a window, spreads after entering the second instar, the green colored caterpillar on the back has a light green line, on the right and left sides the color is older, and there are chitine hairs, there are Also the caterpillars which are green with three rows of lighter color and side lines are green and yellow and the hair is green, the kettles forming pupae will drop in the ground under the cabbage plant and there are also pupae on the leaves. The first instar larvae are light green, the head is black and the body surface is covered with fine hairs. This larva is still weak and is mostly silent by covering its body with fine white threads that come out of its mouth. Second instar larvae when molting, pale green skin, reddish brown head. When molting the skin it is sometimes difficult to find skin marks, because the skin marks are eaten by the larvae. Usually all that is left is the hard part of the head. On the side of the larva's body there is a green ribbon. These second instar larvae have been actively moving to eat the leaves until they have holes. After reaching the third instar, the larvae disperse and begin to attack deeper leaves and often enter the shoots of the plant and destroy the growing point. Larvae usually eat together in a plant and eat the lower leaves without eating the upper membrane so that the leaves become transparent. The larva's body accumulates light green larval excrement. Fourth instar larvae are light green, the head and legs are brownish and the longitudinal green stripes on the body are more pronounced. In the intermediate stage from the larvae to the prepupa period, it is greenish yellow with a blackish head. On the back and side of the larvae there are longitudinal brown lines. Larvae are puppies in the soil and reddish in color with a cocoon covered with soil grains. Male and female imago (moth) exit the pupa by breaking the ventral portion of the thorax. The moth that comes out of the pupa is still very weak. A few hours later it can fly. On the head there is a coiled proboscis (trunk) and filiform antennae (like threads). The front leg is shorter than the hind leg. The female moth's abdomen is larger, but shorter than the male moth. The tip of the abdomen of the male moth is blunter and has more fine hair. The characteristics of the head color are orange, body color is cream to slightly yellow, wing color is brown with black spots, laying eggs under the leaves. The research location is at a position of ± 85 meters above sea level. Humidity 87%. Temperature 26 ° C. Laboratory room temperature 27 ° C. Screening temperature 27 ° C, green house temperature 30.4 ° C. The number of rainy days is 24 days. The duration of the sun's radiation is 53%. Rainfall 315 millimeters. Key words: morphology, size, shape, larva color, behavior of Crocidolomia pavonana
ANALISIS KANDUNGAN BAHAN ORGANIK TANAH DI KEBUN TRADISIONAL DESA SEREH KABUPATEN KEPULAUAN TALAUD Nangaro, Riansen Alva; Tamod, Zetly E,; Titah, Tilda
COCOS Vol 3, No 1 (2021): Edisi Februari-April
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i1.32111

Abstract

ABSTRACTThe objectives of this study were to determine the content of soil organic matterin traditional gardens in Sereh Village, Lirung District, Talaud Islands Regency. Thisresearch was conducted in the Traditional Garden of Sereh Village and the Laboratoryof Chemistry and Soil Fertility, Faculty of Agriculture, Unsrat for 1 month. Thisresearch uses a survey method. Sampling was carried out using the sampling methodin groups / cluster sampling (CS). Soil samples were taken with a depth of 0-50 cm,50-100 cm, and> 100 cm under the clove, nutmeg and coconut plants. The chemicalparameters analyzed were; organic matter content (Walkley and Black Method). Soilsamples were analyzed at the Laboratory of Chemistry and Soil Fertility, Departmentof Soil, Faculty of Agriculture, Sam Ratulangi University.Based on the results of the analysis, it shows that the organic matter content islow to moderate with the details that are in the low category, namely: In the 50-100 cmlayer -and> 100 cm the upper slope of the clove plant is 1.80% -1.20%, the nutmegplant is worth 1, 80%, and coconut plants worth 1.92%. The middle slope of the cloveplant was 1.80% -1.20%, the nutmeg plant was 1.20%, and the coconut plant was1.80%. The lower slope of the clove plant was 1.92% -1.68% -1.56%, the nutmeg plantwas 1.80% -1.20%, and the coconut plant was 1.56%. And in the medium category,namely: In layers 0-50 cm and 50-100 cm, the upper slope of the clove plant is 3.95%,the nutmeg is 3.59% -2.99%, and the coconut plant is 3.71% - 2.40%. The middle slopeof the clove plant was 3.59%, the nutmeg plant was 3.95% -3.35%, and the coconutplant was 2.99% -2.40%. The lower slope of the nutmeg plant is 3.11%, and under thecoconut plant it is 3.95% -2.04%.Keywords: Analysis of organic matter
SERANGAN HAMA PENGGEREK BATANG PADI KUNING (Scirpophaga incertulas Wlk.) PADA TANAMAN PADI SAWAH (Oryza sativa L.) di DESA LIWUTUNG II KECAMATAN PASAN KABUPATEN MINAHASA TENGGARA Uguy, Olden Julio Ronaldy; Montong, Vivi; Kaligis, James
COCOS Vol 3, No 1 (2021): Edisi Februari-April
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i1.32441

Abstract

ABSTRAKRice plants (Oryza sativa L.), including the Poaceae family, one of the most important food plants forIndonesia because the staple food for most of the population is rice. Scircpophaga incertulas (Yellow PBP) isone of the most harmful rice plant pests in Indonesia and several countries in Asia. This study aims todetermine the level of attack of the Yellow Rice Stem Borer in rice (Oryza sativa L.), especially in LiwutungII Village, Pasan District, Southeast Minahasa Regency. The research was conducted in Liwutung II Village,Pasan District, Southeast Minahasa Regency. The research was conducted from September to December2020. The materials and tools used were rice plants, tajar gamal wood, scissors, plastic rope, tweezers,cameras and ATMs. The study used a survey method in lowland rice fields in the generative phase in 3different rice fields with five sub-plots, each sub-plot was taken 50 clumps of plants to be observed. The areaof the rice plot used is A (60 x 5 m) B (60 x 7 m) C (30 x 5 m). Sub plot (3 x 3 m). The things observed werethe number of S. incertulas infestations found in each sub-plot and the number of clumps attacked. Based onthe research that has been done, it can be concluded that the most attacks were in rice field B with an attackintensity of 15.4%, rice field A 14.9% and the lowest attack intensity was found in rice field C with anaverage attack intensity of 5.4. %Keywords: Yellow Rice Stem Borer Attack

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