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Guntur S.J. Manengkey
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INSIDENSI PENYAKIT LAYU BAKTERI PADA TANAMAN KENTANG (Solanum tuberosum L) DI KECAMATAN MODOINDING Wenas, Monica; Manengkey, Guntur S.J.; Makal, Henny V.G.
COCOS Vol 7, No 3 (2016)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i3.12153

Abstract

ABSTRACTThis reseach aims study the wilt desease of bacterial on potato held in Mondoinding District for3 monts from January to April 2016. Laboratory studies conducted at the Laboratory ofMicrobiology and Plant Pathology, Faculty of Agriculture Unsrat Manado and in the field whichis in Modoinding District. The research in the laboratory is to determine the pathogenic bacteriathe causes wilt disease while in the field is to determine the incidence of the disease thet carriedout in the Linelean village, Makaaroyen village and Palelon village using subplots extent of 2 mx2 m and the spacing used between the plants is 40 cm x 20 cm with the number of samples ineach subplot at 22 plants, to study the incidence of the disease by the method of survey andsampling deliberate on potato experiencing symptoms of wilting. The result showed that thecharacteristic of pathogenic bacterial causing wilt disease on potatoin the Modoinding Districtthat Ralstonia solanacearum, is the symptoms of the plants become wither, the stem becomesbrown and rotten. The result of the study the incidence of wilt diseases caused by pathogenicbacteria in the field have differences with the incidence of wilt diseases caused by pathogenicbacteria at each location, with the highest incidence is Linelean village with 51.58%, followed by44.88% Palelon village and the Makaaroyen village 40.78%. The incidence of bacterial wiltdisease in Modoinding district each location of the observations is increasing every week withthe highest incidence of will disease caused by pathogenic bacteria is an average of 78.62% andthe lowest attack which is an average of 5.45%.
KARAKTERISTIK IMAGO SITOPHILUS ORYZAE DAN S. ZEAMAIS PADA BERAS DAN JAGUNG PIPILAN (CHARACTERICS OF IMAGO SITOPHILUS ORYZAE AND S. ZEAMAIS ON RACE AND CORN) Gwijangge, Paut; Manueke, Jusuf; Manengkey, Guntur S.J.
COCOS Vol 1, No 5 (2017)
Publisher : COCOS

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Abstract

ABSTRACTThis study aims to determine the differences of imago characteristics of S. oryzae and S. zeamais onrice and corn. This research used descriptive observational method by identifying the externalmorphology and describe all the observed parts. Morphological characters were observed byobserving the external morphological features of insects including differences of body size, bodycolor, antenna, rostrum, and other morphological features. Observation of body color by binocularmicroscope included overall body color, color and form of elytra, foot color, antenna and rostrum.Body sizes were measured by using ruler or millimeter scale paper by means of insect anesthesia byusing ethyl acetate, then stretching the body of insects in full on white paper with millimeter scaleplaced underneath the insects. Results of the study indicated that the S. oryzae imago were brightblack or brownish black, having four oval pictures on elytra, and reddish brown legs. Imago of S.zeamais were solid black or dark color with four yellowish brown pictures on elytra, and brownishyellow legs. The average body length of S. oryzae young adult was 2.16 mm (ranged from 2.0 to2.4 mm), and for adult was 3.36 mm (ranged from 3.0 to 3.7 mm). The average body length of S.zeamais young imago was 2.54 mm (ranged from 2.4-2.7 mm), and 4.78 mm (range 3.7 to 4.7 mm)for the older imago. The observation of adult male and female body size differences of S. oryzaeand S. zeamais showed that adult females were larger than males. The roustrum (snout) of femaleinsects was longer and bigger, while the male imago was shorter and thinner. Abdominal end of themale imago when viewed from the lateral direction showed a curved shape and when viewed fromthe posterior direction showeda tapered shape. The female abdomen when viewed from the lateraldirection was not curved or straight back, and seen from the posterior direction was rather enlargedand blunt. The average length of S. oryzaerostrum was of 0.16 mm (ranged from 0.1 to 0.24 mm)for adult males and 0.32 mm (range 0.2-0.4 mm) for adult females, while S. zeamais was 0.5 mm(ranged from 0.4-0.6 mm) formale imago, and 0.62 mm (range 0.5-0.7 mm) for female imago.Antenna of S. oryzae and S. zeamaisshowed of an angle shape with a club type. The averageantenna length ofS. oryzae was 0.94 mm (ranged from 0.8 to 1.1 mm) for adult males and 1.46 mm(range 1.2 to 1.8 mm) for adult females;S. zeamais antenna length was 1.9 mm (range 1.7- 2.1 mm)for adult males, and 2.5 mm (ranged from2.2-2.6 mm) for adult females. The sex ratio difference ofS. oryzae and S. zeamais was 0.8 (ranged from 0.7-0.9) for S. oryzae, and 0.7 (ranged from 0.67 to0.85) for S. zeamais.Key word : Characteristics of adult. S. oryzae, S. zeamais, Race, Corn.
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)
Publisher : COCOS

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Abstract

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
INSIDENSI PENYAKIT KARAT PADA KACANG MERAH (Vigna angularis (Willd) Ohwi& H.Ohashi) DI KABUPATEN MINAHASA Husain, Wati; Manengkey, Guntur S.J.; Makal, Henny V.G.; Paath, Johanna M.
COCOS Vol 3, No 6 (2013)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v3i6.3001

Abstract

ABSTRACTThis study aims to determine the symptoms and the incidence of rust disease on red beans in Minahasa Regency. The research was conducted in July to Oktober 2012 in the village of Tonsewer, Toured and Tumaratas. Continued research in the Laboratory of Microbiology and Plant Diseases, Faculty of Agriculture, University of Sam Ratulangi Manado, to observe microscopic rust disease symptoms on kidney beans. The method used was a survey method by making an incision on the diagonal red bean plant sample plots with a size of 2 x 2 m and subsequent rust disease incidence was observed in these plants. Based study showed that the rust disease caused by a Uromyces sp. fungus that has synctoms on the upper and bottom leaf surface of the small spot form with the color rather pale, sligthly up (stand). In general these tiny spots surrounded by a chlorotic part, although there are also the only form of brown spots. Incidence of the disease increases with age of the plant until near harvest and the fourth observation in the village of Tonsewer 47.06 %, village of Toure 46.08 % and village of Tumaratas 47.06 %.Keyword: Imcidence of rust disease on red beans, Uromyces sp.
DIAGNOSIS DAN INSIDENSI PENYAKIT REBAH KECAMBAH PADA TANAMAN KACANG TANAH (Arachis hypogaea) DI KABUPATEN MINAHASA Bullele, Elisca A.; Ratulangi, Max M.; Manengkey, Guntur S.J.; Makal, Henny V.G.
COCOS Vol 6, No 7 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i7.8111

Abstract

This study aims to determine the incidence of disease diagnosis and plant pests on crops peanut held in Minahasa District, in the district of the village Kawangkoan Kanonang, villages and rural Kiawa Tombasian. In the District of Sonder held in the village Leilem I, villages and rural Talikuran Leilem II, which took place during the months of September to December 2013. The study continued in the Laboratory of Microbiology and Plant Pathology, Faculty of Agriculture, University of Sam Ratulangi to observe microscopic plant pests that cause disease in plants peanuts. The method used is a survey method by determining the location and observation blocks. Location observation peanut farmer's crop in the district and sub-district Kawangkoan Sonder. Each village in each district specified area is used as an observation area, which is 10m x 20m which is divided into five sub-plot of the observations in the form of diagonal slices. Observations plant started in germination phase performed 4 times at intervals of one week. Plants showing symptoms of the disease-causing Aspergillus flavus which can be seen on the trunk of peanut plants were starting to rot and colored black and attack the plant until it withered and stunted. Pathogens infect the plant at the time of germination. The incidence of plant pests on crop diseases peanut in Minahasa highest average occurred in the village Kanonang with an average of 8.49%, Kiawa village with an average of 7.70% later in the village Leilem I with an average of 7.54 %, on average Tombasian villages of 7.31%, with an average Talikuran 7.21 and terenda with an average 6.73%. The incidence of plant pests diseases in the district and sub-district Kawangkoan Sonder at all observation sites every week by plant pests incidence of disease caused by the fungal pathogen is with an average of 8.49% and a low of 6.73% attack.
INSIDENSI PENYAKIT TUNGRO PADA TANAMAN PADI SAWAH DI KECAMATAN TOMOHON BARAT KOTA TOMOHON Tamuntuan, Livita C.; Manengkey, Guntur S.J.; Makal, Henny V.G.; Ratulangi, Max M.
COCOS Vol 6, No 6 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i6.8039

Abstract

ABSTRACTThis research aims to study the incidence of disease in lowland rice tungro held in the District of West Tomohon, and lasted for 5 months from the month of November 2014 until March 2015. This study uses a survey or field observation purposive sampling with the object of research fields rice farmers in West Tomohon sub district, which is in the Village Taratara and Village Woloan. Each village was taken three plots groves and each plot was made sliced diagonally with five subplots with the size of each subplot that is 2 m x 2 m. At each subplot obtained 56 family of plants that was four weeks with a spacing of 15 cm x 20 cm x 40 cm (Legowo row 1: 3) of crop land, observations were made four times at intervals of one week. The results showed that characterizes the disease tungro rice paddy in the district of West Tomohon is infected plants tungro disease suffered stunted plant growth (dwarf), the color of the leaves turn yellow to yellow orange accompanied with brown spots on the leaves. Tungro disease incidence in rice crops in West Tomohon sub district amounted to 22:43%. Tungro disease vector Populations in West Tomohon sub district is 7.6 tail.Key words: Incidence, Disease Tungro, Rice
Insidensi Penyakit Karat (Puccinia arachidis) pada Tanaman Kacang Tanah (Arachis hypogaea L.) di Kecamatan Tompaso Dan Kawangkoan Kabupaten Minahasa Aneta, Ridwan; Ratulangi, Max M; Manengkey, Guntur S.J.
COCOS Vol 7, No 7 (2016)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i7.14021

Abstract

SUMMARYDisease Incidence Rust (Puccinia arachidis) on plants of Peanut (Arachis hypogaea L.) in District Tompaso and Kawangkoan MinahasaRidwan Aneta, Max M. Ratulangi, and Guntur S. J. ManengkeyThe purpose and benefits of the research to determine the incidence of rust on peanut plants in the District Tompaso and Kawangkoan Minahasa, and the benefits of research can provide information to the relevant agencies, especially to farmers about the existence of this disease in order to prepare a peanut crop control strategies of the disease. The research was conducted in three village namely Pinabetengan, Kanonang and Kayuuwi, District Kawangkoan, Minahasa, and the study lasted for four months. The results showed that the symptoms ofdisease-causing pathogen attack or rust fungus Puccinia arachidis on peanut plants occur at all levels of the age of the plant is vegetative and generative growth. Pathogens forming patches on the surface of the lower and upper leaves with urediospora there are more obvious on the lower leaf surface than the upper surface of the leaf. The results of microscopic observation showed that urediospora shaped somewhat oval, urediospora with brownish colored water media while the media Laktofenol Cotoon Blue color changes such as a golden brown. Furthermore, the incidence of fungi that cause rust on peanut plants are in the village Kayuuwi lowest with an average percentage of 17.75; The village following Pinabetengan with an average percentage of 19.75; and was highest in the Village Kanonang with an average percentage of 22.67. Furthermore the average overall incidence is 20,06 %Keyword: Peanut, Rust Diseases Puccinia arachidis
JENIS DAN POPULASI SERANGGA DI AREAL TANAMAN NENAS (Ananas Comosus (L.) Merr.) KECAMATAN PASSI BARAT KABUPATEN BOLAANG MONGONDOW Pulukadang, Slamet; Mamahit, Juliet M.E.; Dien, Moulwy F.; Manengkey, Guntur S.J.
COCOS Vol 4, No 6 (2014)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v4i6.4844

Abstract

ABSTRACTThis study aims to determine the insect types and populations at the areas of Pineapple plants near housing ecosystems and near forest ecosystems. The experiment was conducted in centers of Pineapple plantation in the Mongkonai and Lobong village District of Bolaang Mongondow and at the Laboratory of Entomology and Plant Pests UNSRAT Faculty of Agriculture for five months from July to December. insect Observation on pineapple plants is done by using the method of trapping wells (pithfall) on generative plant and samples insects taken three times. The results showed that there are four associated insect Order on the areas of Pineapple plants near housing ecosystems are: Order Orthoptera (Family Acrididae, Gryllidae); Order Coleoptera (Family Scolytidae, Scarabaiedae); Order Diptera (Family Drosophilidae, Bombyliidae); and the Order Hymenoptera (Family Formicidae), while on the area of Pineapple planting near the forest ecosystem there are five insects Order are :: Order Orthoptera (Family Gryllidae, Acrididae, and Blattidae); Order Coleoptera (Family Scarabaeidae, Scolytidae, Cicindelidae, Crysomelidae, and Alleculidae); Order Diptera (Family Drosophilidae, Bombyliidae, and Tachinidae); Order Hymenoptera (Family Formicidae); and the Order Lepidoptera (Family Pyralidae). The results also obtain the number of insects found in varying amounts each Family. The number of insects found on average ranges from 2-423 insect.Key words : the insect types and populations, Pineapple plants
INTENSITAS DAN LAJU INFEKSI PENYAKIT KARAT DAUN Uromyces phaseoli PADA TANAMAN KACANG MERAH Manengkey, Guntur S.J.; Senewe, Emmy
EUGENIA Vol 17, No 3 (2011)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.17.3.2011.3546

Abstract

ABSTRACT   Rust leaf on red bean is major desease in the area of Tonsewer, Toure dan Tumaratas village. The aim of the study was to determine the intensity and infection rate of rust disease on red bean at  Tonsewer, Toure and Tumaratas village, The method used was survey by drawing a diagonal line at four points and one point in the center of each farm. Hence,  there were five points that  were used for sampling area for calculating the intensity and the infection  rate caused by  leaf rust Uromyces phaseoli. The result showed that red bean farm  in the village of Tonsewer, Toure and Tumaratas had been infected by rust disease caused by the fungus Uromyces phaseoli . The average of attacking intensity was 62.29% in Tonsewer. Whereas,  Toure and Tumaratas were 61.71% and 62.29 respectively. The average of  infection rate was 0.239 per unit per day in the Tonsewe. While in the Toure and Tumaratas were  0.189  and 0.208 per unit per day respectively . Keyword : Intensity and infection rate,Red Bean
EFEKTIVITAS Trichoderma sp. METABOLIK DAN Pseudomonas fluorescens TERHADAP PENYAKIT BUSUK LUNAK PADA TANAMAN KOL BUNGA (Brassica oleracea var. Botrytis L.) Runtukahu, Juliana O.; Assa, Berty H.; Manengkey, Guntur S.J.
COCOS Vol 7, No 5 (2016)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i5.13656

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ABSTRACTThe purpose of this study is to see Efektivitas Microorganisms antagonists Trichoderma sp.Metabolic and Pseudomonas fluorescens against Rot Disease on Plant Cauliflower for 4 months,namely from March to June 2016 in the Village Paslaten District of Tomohon East and in theLaboratory of Microbiology and Plant Pathology, Faculty of Agriculture, University of SamRatulangi Manado. Research in the laboratory to observe microscopically cause soft rot cauliflowerplants.This research was conducted using the method of randomized block design with 3 treatments,treatment A control without application of microorganisms antagonistic, treatment B withapplication of microorganisms antagonistic Trichoderma sp. metabolic, and treatment C withapplication of microorganisms P. fluorencens. this treatment is repeated 10 times. With ratingsplants infected with the disease formula presentation. The variables measured were presenting thenumber of infected leaves and cauliflower infected.The results showed that of some microorganismused, the most effective at controlling soft rot disease on a cauliflower is Pseudomonas fluorencensobservation with the end result obtained was 30%, followed by Trichodermasp. metabolic 40%.Treatment antagonistic microorganisms is also seen to be effective in inhibiting disease infection onthe leaves of the plant before the formation of flowers.Kata kunci :Efektivitas, Cauliflower, Erwinia carotovora, Pseudomonas fluorescens, Trichodermasp. Metabolic.