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Articles 27 Documents
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UJI PATOGENISITAS JAMUR ENTOMOPATOGEN Beauveria bassiana Bals. TERHADAP WALANG SANGIT Leptocorisa acuta Thunb. PADA TANAMAN PADI Kastilong, Elhanan B.; Lengkong, Maxi; Engka, Reity
COCOS Vol 8, No 8 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v8i8.36451

Abstract

ABSTRACT Rice ear bug (Leptocorisa acuta) in rice is an important pest that can reduce rice production. One of the control techniques is a biological control technique that utilizes the entomopathogenic fungus B. bassiana. This study aimed to examine the pathogenicity of the entomopathogenic fungus B. bassiana against L. acuta. This research was carried out in May - July 2021 at the Laboratory of Biological Agents of the Kalasey Food and Horticultural Crops Protection and Quality Testing Center. The study used a completely randomized design (CRD) with 4 treatments which were repeated 3 times. The experimental treatment used doses with conidium density B. bassiana, namely conidium density 108 conidium/ml (A), 107 conidium/ml (B), 106 conidium/ml (C), and control (K). Based on the results of the study after the application of B. bassiana to L. acuta, the pathogenicity level of B. bassiana in infecting L. acuta on the tenth day had a difference where the treatment with conidium density of 108 conidium/ml was able to cause 72% mortality, in the treatment with a density of 107 conidium/ml can cause 57% mortality, and at a density of 106 conidium/ml it can cause 48% mortality. This difference in mortality could be due to the high concentration of spores used, thus affecting the existing mortality rate. The results of probit analysis showed that the LT50 value in the conidium density treatment of 108 conidium/ml reached 6.8 days; 107 conidium/ml reached 8.9 days; and 106 conidium/ml reached 11.9 days, with an LC50 value with a conidium density of 108 conidium/ml. The conclusion that can be drawn from this study is that the level of pathogenicity of the fungus B. bassiana infecting L. acuta occurred on the first day after application. Density treatment of 108 conidium/ml was able to cause the highest mortality, namely 72% mortality. The results of probit analysis showed that the fastest LT50 value was found in the treatment with a density of 108 conidium/ml which reached 6.8 days. LC50 is at a value of 7.8 or a concentration with a conidium density of 108 conidium/ml. Keywords : Rice (Oryza sativa L), Leptocorisa acuta, B. bassiana.
PERSENTASE SERANGAN HAMA Brontispa longissima (Gestro) PADA TANAMAN KELAPA (Cocos nucifera L.) VARIETAS GENJAH RAJA DAN VARIETAS DALAM BIDO DI BALAI PENELITIAN TANAMAN PALMA MAPANGET Salasa, Tirsa; Rante, Caroulus S.; Kandowangko, Daisy
COCOS Vol 8, No 8 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v8i8.36968

Abstract

ABSTRACTThis study aims to determine the percentage of pest attack Brontispa longissima (Gestro) oncoconut (Cocos nucifera L.) varieties Genjah Raja and varieties Dalam Bido. The results of the studyare expected to provide information or knowledge to the public regarding the percentage of pestsAttacks B. longissima on coconut so that B. longissima pests can be controlled. The research wascarried out in the coconut plantation area of the Palma Research Institute (Balit Palma) MapangetDistrict, North Minahasa Regency. The research took place from March to July 2021. The researchwas conducted in the form of a survey or by direct observation at the research site. The study wasconducted at the Experimental Garden of Mapanget on coconuts of Genjah Raja and Dalam Bidovarieties with a land area of ± 0,2 hectares for each variety, then divided into five sub-plots ofobservations spread diagonally. The things that were observed in this study included the symptoms ofthe attack, the plants that were attacked, the fronds that were attacked and the category of attack.The results showed that the percentage of B. longissima pest attack on coconuts in the Dalam Bidovariety was 20% and the Genjah Raja variety was 12.5%. The percentage of midrib that was attackedby B. longissima in the Dalam Bido variety was 17.99% and the Genjah Raja variety was 10.91%.Keyword : Percentage, B. longissima, Coconut
INVENTARISASI JENIS PAKAN MONYET HITAM SULAWESI (Macaca nigra) DI SUAKA MARGASATWA MANEMBO-NEMBO Turangan, Olivia S. M.; Pollo, Hard N.; Tasirin, Johny S.
COCOS Vol 8, No 8 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v8i8.38804

Abstract

ABSTRAK The threat to Macaca nigra is due to the increasing number of hunting by humans and the destruction of natural habitats that occur. Macaca nigra is hunted for consumption, trade and as pets for the community. The reduction in forest area causes Macaca nigra to lack shelter and food sources. The purpose of this study was to make an inventory of Macaca nigra feed in the Manembo-nembo Wildlife Sanctuary. The method used at the research location is the Transect Method (Line). Observations began by observing the home range of a group of Macaca nigra to place the plot line to be made. Based on the results obtained from the results of research conducted at the Manembo-nembo Wildlife Sanctuary, the number of types of feed found was 27 species from 15 families with 188 individuals. The highest number of individuals, 83 individuals, was from the Arecaceae family, and the lowest number of individuals, 1 individual, was from the Anacardiaceae and Malvaceae families
PERILAKU YAKI (Macaca nigra) DI KANDANG HABITUASI GUNUNG MASARANG Pariama, Alfa Jevian; Langi, Martina A.; Tasirin, Johny S.
COCOS Vol 8, No 8 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v8i8.38726

Abstract

Abstract The aims to study the daily behavior of Macaca nigra in habituation cage on Mount Masarang, Tomohon city. Data collection was carried out for 2 (two) weeks, from November to December 2022. Daily behavior recording used instantaneous sampling, namely recording behavior at intervals of one minute, the methods used were observation and focal animal sampling. The result showed that the highest proportion of daily behavior of Macaca nigra in the Habituation Cage of Mount Masarang, Tomohon City is social behavior 36.6% followed by moving behavior 27.6% and feeding 24.5% the rest is used for resting 11.3%. The frequency of activity of Macaca nigra male is higher than Macaca nigra female, namely 169 times a day while Macaca nigra female 149 times a day. Keywords: Behavior, Macaca nigra, habituation cage, Masarang Pendahuluan Pulau Sulawesi mempunyai
POTENSI PENGGUNAAN METIL EUGENOL TERHADAP HAMA LALAT BUAH Bactrocera spp. (DIPTERA : TEPHRITIDAE) PADA TANAMAN LABU SIAM Sechium edule (Jacq) Sw. DI KOTA TOMOHON Maarebia, Chika C.; Tarore, Dantje; Lengkong, Maxi
COCOS Vol 8, No 8 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v8i8.37324

Abstract

ABSTRACT One of the subtropical plants that are often found in Indonesia is the chayote plant (Sechium edule (Jacq) Sw., whose fruit is used as food and is a vegetable consumed by the general public. The genus Bactrocera is reported to have 440 species and the family Tephritidae is the largest group of the order Diptera which is an important family because it is economically very detrimental because it acts as the main insect pest. The aim of the study was to determine the effectiveness of the use of methyl eugenol as an attractant against the type and population of the fruit fly Bactrocera spp. (Diptera:Tephritidae) on chayote plants S. edule (Jacq) Sw. in the city of Tomohon. The research was carried out using a survey method using traps at several chayote planting centers. In the experimental plot, three locations were chosen, each location was placed two traps on the east and west, the traps that were installed were traps made of modified mineral water plastic bottles, sprayed curacron insecticide into the trap bottles, cotton rolled with a diameter of approx. two cm were then tied and dropped with two ml of methyl eugenol using a syringe and then hung on the center of the trap bottle, the number of traps from the entire location was six bottles. The results of the research on the types of fruit flies caught in chayote cultivation using methyl eugonal as an attractant were B. dorsalis, B. carambolae, B. umbrosa, B. albistrigata, and B. cucurbitae. The use of methyl eugenol as an attractant was able to catch several types of fruit flies in the Kakaskasen sub-district as many as 478 tails, Talete 1 as many as 290 tails, and Talete 2 as many as 269 tails with a total catch of 1033 tails. Keyword : potential, methyl eugenol, Bactrocera spp, Sechium edule
KEANEKARAGAMAN SERANGGA TANAH DI TAMAN WISATA ALAM (TWA) BATUPUTIH Patale, Nita; Frans, Terry M.; Marthen Th. Lasut, Marthen Th. Lasut
COCOS Vol 8, No 8 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v8i8.38738

Abstract

Abstract Soil insects are a type of insects that inhabit litter or soil. In almost of their lives the abundance and dominance of insects in a ecosystem is influenced by litter on the forest superficies. The purpose of this research is to determine the diversity of soil insects in coastal forest and lowland forest ecosystem types in Batuputih Nature Park (Taman Wisata Alam Batuputih). This research used Purposive Sampling method at two different locations: Coastal forest and lowland forest. The sampling technique that used in this research is trap. Based on the result of research conducted in Taman Wisata Alam (TWA) Batuputih, there are 7 species of soil insects found in the coastal forest ecosystem type, 12 species in the lowland forest ecosystem type, and 2306 individual soil insects from 11 families contained in these ecosystems. The spesies diversity index in Taman Wisata Alam (TWA) Batuputih is low with the spesies diversity index in coastal forest (H’=1.126), lowland forest (H’=1.219) and both of those ecosystems (H’=1.257). The spesies abundance and soil insects spesies diversity index in lowland forest ecosystem types are higher than coastal forest ecosystem types. Key Words: Soil Insect, Diversity, Taman Wisata Alam Batuputih
KAJIAN PENGGUNAAN PIPA PVC BENTUK BULAT DAN TALANG TRAPESIUM SEBAGAI INSTALASI IRIGASI DALAM USAHA HIDROPONIK TANAMAN SELADA (Lactuca sativa L.) Dalanggo, Ahmad; Kalesaran, Leo H.; Ludong, Daniel P. M.
COCOS Vol 8, No 8 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v8i8.38280

Abstract

Abstract This study aims to examine evapotranspiration in round pipes and trapezoidal gutters and their relationship to plant growth, assess the effect of microclimate on plant growth and production yields, calculate air efficiency, and analyze profit and loss using both types of pipes. This study was designed as an experimental study using 3 trapezoidal gutters and round pipes with a length of 4 m which were integrated into a water irrigation flow system using a pump, and each pipe used 20 planting holes. The results showed an average trapezoidal gutter evapotranspiration of 2334 , 67 ml of planting and in round pipes the average was 1955.50 ml of planting, the temperature in the pipe was around 29°C, the air temperature was around 30°C and the humidity was around 80%. plants in trapezoidal gutters had an average height of 17.49 cm, number of leaves 28, plant diameter 26.39 cm, leaf width 10.73 cm, leaf length 17.32 cm and total plant weight of 100.08 g, and plants in pipes spherical has an average height of 14.78 cm, number of leaves 24.58 strands, plant diameter 22.99 cm, leaf width 9.63 cm, leaf length 14.27 cm and total plant weight 65.52 g. liter of water in trapezoidal gutters produces 42.87 g of plant biomass, and every liter of water in the pipe produces 33.51 g of plant biomass, then the cultivation of circular lettuce plants in an area of 400 m2 using trapezoidal gutters gives sales results ranging from Rp. 116,937,216 every 1 year and lettuce plants on round pipes provide income of around Rp. 75,769,344 every 1 year.. Key words: Hydroponics, Hydroponics Irrigation, Hydrponics Lettuce
SERANGGA-SERANGGA HAMA PADA TANAMAN CABAI RAWIT (Capsicum frutescens L.) DI DESA DUNU KECAMATAN MONANO KABUPATEN GORONTALO UTARA PROVINSI GORONTALO Tahir, Fransisca Indriani; Manueke, Jusuf; Maramis, Redsway Truman Douglas
COCOS Vol 8, No 8 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v8i8.37235

Abstract

ABSTRACT This study aims to determine insect pests on cayenne pepper (Capsicum frutescent L.) in Dunu Village, Monano District, North Gorontalo Regency, Gorontalo Province. This research was carried out for three months, from April to June 2021. The research method used was descriptive exploratory with 2 stages, namely sampling in the field and observations in the laboratory which were then presented in descriptive form in the form of tables, pictures, and graphs. Samples were obtained by catching using light traps and nets carried out for 6 consecutive days on 500 m2 area of cayenne pepper which was used as an experimental or observation area. The area consists of 1 light trap which is placed in the cayenne pepper plant and the lights are turned on every day from 18:00-06:00 WITA, then nets are used at 06:00-07:00 WITA and 16:00-18:00 WITA with the help of hands. Insects caught were taken and then observed the type and number of insects. Based on the results of research conducted, it showed that 8 types of insect pests were found, namely Nezara sp., Faneroptera sp., Gryllus sp., Acrida sp., Valanga sp., Bactocera sp., Circulifer sp., which belong to 4 orders and 6 families. The number of individuals found was 454 individuals, the highest was in the genus Nezara sp. namely 138 individuals and the lowest in the genus Gryllus sp. namely 11 individuals. Keyword : Insect, Pests, Cayenne pepper
Pengaruh Naungan Terhadap Pertumbuhan Bibit Aquilaria malaccensis Lam. Di Persemaian BPDASHL Tondano Kima Atas Manado Lingga, Sahrin; Lasut, Marthen. Th.; Pangemanan, Euis F. S.
COCOS Vol 8, No 8 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v8i8.38805

Abstract

Abstract Aquilaria malaccensis Lam. is a type of tree belonging to the agarwood tribe (Thymelaeaceae) which can be found in Bangladesh, Bhutan, India, Indonesia, Iran, Laos, Malaysia, Myanmar, Philippines, Singapore, and Thailand (Kamonwannasit, 2013). This study aims to determine the effect of shade on the growth of A, malaccsens seedlings. The treatment with shade had an effect on without shade (P1) 33.12 cm giving the highest average height increase since the beginning of the observation, while the treatment with shade P4 (90%) was 26.38 cm and the smallest shade treatment was P3 (90%) 25.86 cm (week II to week II). XIII) compared with other treatments.). stem diameter of seedlings of A. malaccensis in the treatment without shade P1 0.34 mm had the highest value compared to other treatments, while the treatment with shade P3 2 (75%) 0.2 mm and the smallest shade treatment P4 (90%) 0.16 mm during the observation period (week II – week XII). The increase in the number of leaves to the shade treatment was the highest P3 (75%) 17.2 leaves without shade P1 17.2 leaves while the lowest shade treatment was P4 (90%) to the increase in the number of leaves during the observation period (week II – week XIII). Keywords: Aquilaria malaccensis Lam., Effect of shade, Growth
POLA AGROFORESTRI MASYARAKAT DI DESA MOPOLO KECAMATAN RANOYAPO KABUPATEN MINAHASA SELATAN Toding, Eka Maryuni; Ratag, Semuel P.; Pangemanan, Euis F.S.
COCOS Vol 8, No 8 (2021)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v8i8.38728

Abstract

Abstract Agroforestry is a land management system consisting of a combination of trees, shrubs, or seasonal crops often accompanied by livestock in the same land. The objectives of agroforestry land management are to maximize land productivity, create jobs, and increase income in rural areas. Mopolo Village is located in Ranoyapo District, South Minahasa Regency, North Sulawesi Province. This study aims to identify the agroforestry pattern applied by the community in Mopolo Village, South Minahasa Regency and describe the advantages and disadvantages of the agroforestry pattern applied by the community in Mopolo Village, South Minahasa Regency. This study uses a survey method by conducting interviews as a data collection tool. Based on the results of the study, it showed that the agroforestry patterns applied by farmers in Mopolo Village were agrisilvicultural patterns, agrosilvopasture patterns, and agrosilvofishery patterns. The advantages of applying the agroforestry pattern are increasing farmers' income and livestock owned by farmers getting feed from managed land while the lack of applying the agroforestry pattern is that the plants used by farmers in Mopolo Village are attacked by pests, which until now have not known the type of pests that attack and other things. What disturbs plant growth is the presence of released chickens that enter the land and disrupt plant growth. Keywords : agroforestry pattern, agroforestry, Mopolo Village, Ranoyapo District.

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