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Guntur S.J. Manengkey
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Agriculture, Biological Sciences & Forestry

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INSIDENSI PENYAKIT LAYU BAKTERI PADA TANAMAN KENTANG (Solanum tuberosum L) DI KECAMATAN MODOINDING Monica Wenas; Guntur S.J. Manengkey; Henny V.G. Makal
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%.
INSIDENSI PENYAKIT BUSUK HITAM PADA TANAMAN BROKOLI (Brassica oleracea var. Italica) DI TOMOHON Fei Sie Lumoly; Emmy Senewe; Guntur S.J. Manengkey
COCOS Vol. 7 No. 4 (2016)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i4.12868

Abstract

ABSTRACKThis study aims to determine the symptoms, and incidence of black rot in broccoli. This research was conducted at multiple centers Tomohon on planting broccoli, namely in the Village Kakaskasen, Village and Village Kinilow Paslaten. The study lasted for 3 months that is April to June 2016. The research method was conducted in two places, namely the laboratory of Microbiology and Plant Pathology, Faculty of Agriculture Unsrat Manado and in the location of planting broccoli. This study uses a survey in the field with a purposive sampling and the object of research is the broccoli plants owned by farmers. Observations were carried out six times at intervals of one week. The first observation to a third observation is the observation of the broccoli plant vegetative phase, and the fourth to sixth observation is the observation of the broccoli plant generative phase. The results of this study show early symptoms of infectious disease-causing black rot in broccoli in the vegetative phase is there are yellow spots shaped like the letter V on leaves of broccoli, the area spotting eventually dries and turns brown and then fall, patches can then be spread to all leaves and plants. In the generative phase are rotten and black color on the mass of broccoli flowers. The incidence of infection causes black rot disease in plants of broccoli in the field showed differences in incidence of the disease in each sample location. The average incidence of black rot disease infection highest in the vegetative phase is in the Village Kakaskasen is 67.0% and the lowest incidence is in the Village Kinilow namely 28.7%, while on the generative phase is Village Kakaskasen highest incidence is 44% and the lowest incidence is Kinilow Village of 16.3%
EFEKTIVITAS Trichoderma sp. METABOLIK DAN Pseudomonas fluorescens TERHADAP PENYAKIT BUSUK LUNAK PADA TANAMAN KOL BUNGA (Brassica oleracea var. Botrytis L.) Juliana O. Runtukahu; Berty H. Assa; Guntur S.J. Manengkey
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

Abstract

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.
Insidensi Penyakit Karat (Puccinia arachidis) pada Tanaman Kacang Tanah (Arachis hypogaea L.) di Kecamatan Tompaso Dan Kawangkoan Kabupaten Minahasa Ridwan Aneta; Max M Ratulangi; Guntur S.J. Manengkey
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
KARAKTERISTIK IMAGO Sitophilus oryzae dan S. zeamais PADA BERAS DAN JAGUNG PIPILAN (CHARACTERICS OF IMAGO Sitophilus oryzae AND S. zeamais ON RACE AND CORN) Paut Gwijangge; Jusuf Manueke; Guntur S.J. Manengkey
COCOS Vol. 8 No. 6 (2017)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i5.15878

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.
Co-Authors Aneta, Ridwan Aprilia N. Rares Aprilia N. Rares, Aprilia N. Berty H. Assa Berty H. Assa, Berty H. Caroulus S. Rante Christina L. Salaki Christina L. Salaki Elisca A. Bullele Elisca A. Bullele, Elisca A. Emmy Senewe Fei Sie Lumoly Fei Sie Lumoly, Fei Sie Frida Towaki Henny V.G. Makal Johanna M. Paath Juliana O. Runtukahu Juliana O. Runtukahu, Juliana O. Juliet M.E. Mamahit Juliet M.E. Mamahit Jusuf Manueke Livita C. Tamuntuan Livita C. Tamuntuan, Livita C. Max M Ratulangi Max M. Ratulangi Max Tulung Monica Wenas Monica Wenas, Monica Moulwy F. Dien Muhammad Fadly Syam Paut Gwijangge Ratulangi, Max M Ridwan Aneta Sammy S.N. Rori Slamet Pulukadang Wati Husain Zainudin Limbanadi