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PENGARUH BOBOT UMBI PADA PERKECAMBAHAN BAWANG MERAH (ALLIUM ASCOLANICUM L) VAR. BIMA Baluwo, Eka; Porong, Jelly; Ogie, Tommy
COCOS Vol 2, No 2 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v2i2.32447

Abstract

ABSTRAKThe shallot plant (Allium ascalonicum L.) is one of the annual species included in the Liliaceaefamily. Onion production in North Sulawesi from 2013 to 2017, namely; 1,354 tons, 1,242tons, 1,716 tons, 2,556 tons and 2,880 tons. Production of shallots in Indonesia in 2016amounted to 1,446,869 tons and in 2017 an increase of 1,470,155 tons (Central StatisticsAgency, 2019). Consumption of shallots in Indonesia is 4.56 kg / capita per year or 0.38 kg /capita per month, so that the national consumption is estimated to reach 1,608,000 tons peryear. Vegetative shallot seeds (pseudo tubers) have a high moisture content, so they need anappropriate storage process in order to maintain viability during storage. This study aims toobtain the ideal tuber weight for the seeds of the shallot plant. To get the ideal tuber weight forseeds from onion plants. To get the ideal tuber weight for seeds from onion plants. This researchwas prepared using a randomized block design (RAK) with the treatment of seed weight on thetubers and each treatment was repeated three times A = 2-3 gr, B = 4-5 gr, C = 6-7 gr, D = 8-9 gr and E = ≥ 10 gr. Each treatment consisted of 20 plant samples and was repeated 3 times,so that a total of 300 plants were obtained. The results of the research conducted, it can beconcluded that treatment A (2-3gr) is the ideal seed weight for the germination process, boththe speed of germination and the synchronization of sprouts followed by treatment B, C, andD.Kata Kunci: Bobot Umbi Bawang Merah
Pemanfaatan Ekstrak Daun Pepaya (Carica papaya L.) terhadap Hama Spodoptera frugiperda J.E. Smith (Lepidoptera: Noctuidae) Rumende, Christian F.A.; Salaki, Christina L.; Kaligis, James B.
COCOS Vol 2, No 2 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v2i2.32482

Abstract

ABSTRACTOne of the pests that are detrimental to maize farmers today is the armyworm (S.frugiperda) which attacks maize crops. In general, farmers use chemical insecticides whichare effective but very dangerous to the health of the body and the environment. Carica papayais a plant whose leaves can be used as a botanical insecticide because the secondarymetabolite compounds in these plants can be used as insecticides. The purpose of this studywas to determine the effect of papaya leaf extract on the mortality of S. frugiperda larvae.The method used is data analysis in the form of LC50. In this test using a solutionconcentration of 100 grams/L, 300 grams/L, 500 grams/L, and 700 grams/L with fourrepetitions. The results of the observation of mortality from 24 hours to 96 hours aftertreatment with a solution concentration of 700 grams/L were the solutions that had thegreatest mortality, namely 100% and from the LC50 calculation, the value was 35.457%.This is due to the content of papaya leaf extract which is gastric poison, respiratory poisonand contact poison that can kill S. frugiperda larvae. Papaya leaves can be an alternative toinsecticide for controlling the pest of S. frugiperda.Keywords: Botanical Insecticide, LC50, Mortality.
KAJIAN MUTU BENIH TANAMAN JAGUNG PULUT (Zea mays ceratina L.) DI KABUPATEN BOLAANG MONGONDOW Sekoh, Risky; Tumbelaka, Selvie; Lumingkewas, Adeleyda M.W
COCOS Vol 2, No 2 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v2i2.32448

Abstract

ABSTRACTwaxy corn or glutinous corn is a special type of corn that has a delicious taste, is more savory, fluffier andsofter. Seed quality consists of three components, namely: physical quality, physiological quality, geneticquality. This study aims to determine and study the quality of waxy corn seeds in Bolaang MongondowRegency. The research was conducted in Manado. This research took place from September to October 2020.This experiment used a completely randomized design (CRD), with 3 (three) treatments, namely the source ofwaxy corn seeds from several villages in Bolaang Mongondow Regency consisting of treatment P1 = seedsfrom the village Treatment Threshold P2 = Seed from Pusian Village Treatment P3 = Seed from Insil Village.Each treatment was repeated 4 (four) times in order to obtain 12 experimental units. Result of the experimentshowed The waxy corn in Ambang Village has a different quality from the quality of the seeds from PusianVillage and Insil Village. The quality of seed in Desa Ambang was characterized by germination rate of 88%,vigor index of 79%, synchronous growth of 86% and germinating speed of 28.44% / etmal. The seed qualityof Pusian Village is characterized by germination rate of 99%, vigor index of 83%, synchronous growth of98% and germinating speed of 31.53% / etmal and Village of Insil which has 100% germination, vigor indexof 83%, synchronous growth of 99% and speed of germination of 31.86 % / etmal.Keywords: Seed Quality, Pulut Corn
ANALISIS KEBISINGAN BEBERAPA RUANG TERBUKA HIJAU DI KOTA MANADO Potoboda, Nastasia Irene; Kalangi, Josephus; Saroinsong, Fabiola B.
COCOS Vol 2, No 2 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v2i2.32483

Abstract

ABSTRACTNOISE ANALYSIS GREEN OPEN SPACE IN MANADO CITYThis study aims to analyze the noise leve in several green open spaces in the city of Manado.This research was conducted in march 2020 in three locations, namely the UNSRAT field, theKONI field, and Jln.Piere Tendean-Ahmad Yani,Manado city, North Sulawesi. This study uses apurposive sampling method in determining the sampling point by means of measurements usinga sound level meter (SLM) and the data is processed by surfer 11 software. The results of thenoise level research for UNSRAT Field 40-70 dB(A), KONI Field 47-79 dB(A), and Jln.PiereTendean-Ahmad Yani 50-95 dB(A). From the results of the analysis of existing noise levels, itshows that the location with the highest noise level is Jln.Piere Tendean-Ahmad Yani which areincluded in the green open space area which are included in the green open space area whichonly reaches 71 dB(A) and 79 dB(A) the highest.Keywords: Noise, Green open space, and Manado City.
ANALISIS TINGKAT PENCEMARAN UDARA DI KECAMATAN WANEA KOTA MANADO Sangga, Rendy; Polii, Bobby; Tarore, Aneke
COCOS Vol 2, No 2 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v2i2.32449

Abstract

ABSTRAKAir is a mixture of several types of gases whose ratio is not fixed, depending on the stateof air temperature, air pressure and the surrounding environment. Air pollution is the presenceof one or several contaminants in the atmospheric air, such as dust, foam, gas, fog, smells ofsmoke or vapor in large quantities with various properties or duration in the air, so that theycan cause disturbances to the life of humans, plants or animals or objects or without clearreasons can already affect the sustainability of the life of organisms and objects. This researchwas conducted for one month, from August to September 2020. The research site wasconducted at the air quality observation station in the Provincial Environmental Service. Airquality measurement results. The tools used are computers, writing instruments and a camera.The research method used is secondary data analysis (collecting data and analyzing secondarydata). The gas concentrations in ambient air in Wanea District, Manado City each have thefollowing ranges: SO2 is 10 μg / Nm3 - 18 μg / Nm3; NO2 is 1 μg / Nm3-95μg / Nm3 and COis 20-923 μg / Nm3. The maximum concentrations of SO2, NO2 and CO gases in the ambientair in Wanea District, Manado City are below the required quality standard.Kata Kunci: Pencemaran Udara Di Kota Manado
APLIKASI BIOCHAR DAN PUPUK KANDANG SAPI TERHADAP PERTUMBUHAN TANAMAN BAYAM MERAH (Amaranthus tricolor L) Balompapung, Yonni Oktavio; Warouw, Verry Ch.; Karamoy, Lientje Th.
COCOS Vol 2, No 2 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v2i2.32532

Abstract

SUMMARYYonni Oktavio Balompapung, 14031108021 (2021) Application of Biochar and CowManure on Growth of Red Spinach Plants (Amaranthus Tricolor L). Under theguidance of Dr. Ir. Verry Ch. Warouw, MS as Chairman and Dr. Ir. Lientje Th.Karamoy, MSi as Member.This study aims to examine and find out how much influence the application ofbiochar and cow manure on the growth of red spinach (Amaranthus Tricolor L)plants. This research was conducted in Kakaskasen Village, North Tomohon District,Tomohon City. For pot experiments, soil analysis and cow manure were carried out atthe Laboratory of Chemistry and Soil Fertility, Department of Soil, Faculty ofAgriculture, Sam Ratulangi University, Manado. This research was conducted using acompletely randomized design method consisting of 7 treatments with 5 replicationsin order to obtain 35 experimental pots, where soil control (KT), soil biochar control(KTB) and A, B, C, D, E as mixed growing media biochar and cow manure accordingto the dosage.The results of this study indicate that the application of biochar and cow manureaffects the growth and production of red spinach (Amaranthus Tricolor L.) in thiscase plant height, plant fresh weight and plant dry weight. The higher the dose ofmanure given, the higher the results obtained for plant height, plant fresh weight andplant dry weight.Keywords: Biochar,Cow manure, Red spinach.
INSIDENSI PENYAKIT KERDIL (Bunchy top virus) PADA TANAMAN PISANG (Musa paradisiaca L) DI KECAMATAN AER TEMBAGA KOTA BITUNG Mokolintad, Sasmita; Maramis, Redsway; Makal, Henny
COCOS Vol 2, No 2 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v2i2.32450

Abstract

ABSTRACTBanana (Musa paradisiaca L) is a commodity that is quite attractive to be developed andincreased its production, if it is viewed from the aspect of International trade. Indonesia is acountry is ranked sixth out of the to ten Banana producers in the world and accounts for around30% of domestic fruit production. Banana plants can grow well in low and high areas with analtitude of not more than 1600m above sea level. Many factors can inhibit plant growth,including disease attacks. Some Banana cuktivars that have been released are infected with theBunchy Top Virus. This study aims to determine the Incidence of Bunchy Top Virus attack onBanana plants in Bitung City, Aer Tembaga District, which is located in three villages, namely inKasawari Village, Makawidey Village, and Tandurusa Village. This research was carried out forthree from October to December 2018. This research was conducted by survey method or directobservation at the research location. The results of research on the Incidence of BananaBunchyTop Virus in Bitung city, Aer Tembaga sub-district in three villages. The highest averageIncidence of dwarf disease was in Makawidey villages 11,3%, followed by Tandurusa villages at10,6% then the ;owest Incidence occurred in Kasawari villages 3,45%.
TINGKAT KERUSAKAN DAN PADAT POPULASI HAMA Sexava coriacea L. PADA TANAMAN KELAPA DI DESA TONGUTESUNGI KECAMATAN IBU KABUPATEN HALMAHERA BARAT Rangkaya, Avendi; Lengkong, Maxi; Rante, Caroulus S.; Kaligis, James B.
COCOS Vol 2, No 2 (2021)
Publisher : COCOS

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Abstract

ABSTRACTSexava coriacea L. is a major endemic pest that attacks the leaves of coconut trees in WestHalmahera district and can cause damage so that plants cannot produce fruit and can cause plantdeath if severe attacks. This study aims to determine the level of damage and population density ofS. coriacea pests in coconut plantations in Tongutesungi Village, Ibu District, West HalmaheraRegency. The research was carried out in the coconut plantation area of Tongutesungi Village, IbuDistrict, West Halmahera Regency. Observation of the level of damage to S. coriacea was obtainedby taking five affected leaf sheaths by cutting them to drop them on the ground, then observing thedamage to coconut leaves. The number of fronds observed was 5 times 20 sample plants per 100fronds, so that the total observed fronds were 100 times 5 observation points, namely 500 fronds.Observation of population density of S. coriacea per sample tree was determined by directlycounting the number of insects both nymphs and imago found in coconut leaf midribs. Observationof population density was 4 fronds x 20 sample trees multiplied by 5 points. The observation areawas 400 fronds. The population density of S. coriacea was determined by obtaining the averagevalue of all observational data. The results of the study on the level of damage to the samplingleaves of coconut trees attacked by S. coriacea were 65.07% - 67.32% (> 50-75%) and very heavy79.19% - 81.21% (> 75-100) the average level of damage reached 65.07% - 81.21% or the averagelevel of damage from all observation locations was 74.71%. The population density of S. coriaceamidrib at all observation locations ranged from 1.87- 3.01 individuls/midrib with an averagepopulation density of 2.45 individuals/midrib.Keywords : Sexava coriacea L., Cococ nucifera L., degree of damage, population density
PENGGUNAAN ZAT PENGATUR TUMBUH SITOKININ DAN EKSTRAK BAHAN ORGANIK TERHADAP PERTUMBUHAN ANGGREK DENDROBIUM SECARA In-Vitro Mokoginta, Bryan; Doodoh, Beatrix; Sumampow, Doortje. M. F.
COCOS Vol 2, No 2 (2021)
Publisher : COCOS

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Abstract

ABSTRAKDendrobium orchids are one of the favorite orchid genera for orchid lovers. This is becausethis orchid is able to adapt to various growing environmental conditions. The growth media in tissueculture has a very big influence on the growth and development of the explants and the seeds itproduces. Cytokinins that play a role in stimulating cell division and inducing shoot formation. Someextracts of organic materials that are often used in plant tissue culture are extracts of tomatoes, corn,bananas and coconut water. This study aims to determine the best results of using cytokinins andextracts of organic matter and coconut water for in-vitro growth of Dendrobium orchids. This researchis a library research, which is a series of studies that are concerned with the method of collectinglibrary data, or research where the object of research is explored through various library information(books, encyclopedias, scientific journals and documents). The data used in this research is secondarydata. The data collection method used in this research is the documentation method. . The data analysisused in this study was annotated bibliography analysis.Based on research conducted in the form of literature searches, it can be concluded that byusing growth regulators cytokinins (in this case BAP) and extracts of organic matter, banana extract,tomato extract, corn extract and coconut water, it turns out that the best results are obtained with theuse of growth regulators Cytokinins ( namely BAP) 3 ppm with tomato extract organic matter.Kata Kunci: Zat Pengatur Tumbuh, Bahan Organik, Anggrek Dendrobium
INSIDENSI PENYAKIT KARAT PUTIH (Puccinia horiana) PADA TANAMAN KRISAN (Chrysanthemum spp.) DI KELURAHAN KAKASKASEN II, KOTA TOMOHON Opod, Glowdia L.; Berty Herny, Assa; Tairas, Robert William
COCOS Vol 2, No 2 (2021)
Publisher : COCOS

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Abstract

ABSTRACKThis study aims to determine the symptoms of disease and the incidence of white rust inchrysanthemum plants in Kakaskasen II, Tomohon City. This research was conducted at theGreen House of chrysanthemum farmers in Kakaskasen II Village, Tomohon City in July untilSeptember 2020. The results of observations of symptoms of attack and incidence of rust diseasePuccinia horiana on chrysanthemum plants in Kakaskasen II, Tomohon City from the firstobservation to the last observation tend to remember with an average incidence of disease attackin Green House A is 45.90% and an average incidence of white rust disease in Green House B is36.86%.Keywords: White Rust Disease, Chrysanthemum Plants

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