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Max M. Ratulangi
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INSIDENSI PENYAKIT AKAR GADA (Plasmodiophora brassicae Wor.) PADA TANAMAN KUBIS DI DESA RURUKAN DAN KUMELEMBUAY KECAMATAN TOMOHON TIMUR KOTA TOMOHON Frida Towaki; Max M. Ratulangi; Guntur S.J. Manengkey; Henny V.G. Makal
COCOS Vol. 4 No. 6 (2014)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v4i6.4855

Abstract

ABSTRACTFrida Towaki. Incidence of Clubroot Disease (Plasmodiophora brassicae Wor.) Cabbage Plants in the Village of Rurukan and Kumelembuay East Tomohon District Tomohon City. Guidence Ir. Max M. Ratulangi, MS as chairman, Ir. Guntur S.J. Manengkey, MP and Ir. Henny V.G. Makal, M.Si as memberThe study aimed to determine the incidence of root diseases clubroot on cabbage in the village Rurukan and Kumelembuay, Eastern District of Tomohon, Tomohon . This research was conducted in the village of Rurukan and Kumelembuay sub district East Tomohon, Tomohon city, and continued in the laboratory for microscopic observation of the pathogen Plasmodiophora brassicae. Data retrieval clubroot disease incidence for each village determined four blocks, each block of the extent of 0.5 ha and made sliced diagonally to get five plots with a size of 2.5 x 2.5 m, spacing is 50 x 40 cm so that each plot 32 and the number of plants from the plots do root disease incidence data retrieval clubroot. Data collection was started at the age of 21 plants DAP, with an interval of one week observation period. The result showed that the cabbage plant in the village Kumelembuay and Rurukan Plasmodiophora brassicae Wor already infected. Clubroot cause of the disease with the symptoms experienced withered plant leaves and roots when plants revoked visible swelling. The level of pathogen attack in the village of Rurukan average was 52.17 % and 46.40 % in the Village Kumelembuay.Keywords : Plasmodiophora brassicae Wor, Cabbage
INSIDENSI PENYAKIT LAYU FUSARIUM PADA TANAMAN TOMAT (Lycopersicum esculentum Mill) DI KECAMATAN LANGOWAN BARAT Muhammad Fadly Syam; Max M. Ratulangi; Guntur S.J. Manengkey; Max Tulung
COCOS Vol. 5 No. 1 (2014)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i1.5348

Abstract

ABSTRACKTomato (Lycopersicum esculentum Mill) is no stranger to the community as a tomato vegetable crops play an important role in the nutrition community. This study aims to determine the cause of Fusarium wilt disease and the incidence of disease. This study was conducted in farmers' fields in the village of Tumaratas, Raringis, and Kopiwangker from February to April 2014 This study used a survey method or field observation purposive sampling. Materials and tools used in this study is the tomato crop land, plants Fusarium wilt disease, PDA, CLA media, antibiotics, distilled water, 95% alcohol, petridish, parafilm, test tube, needles ose, spirit lamp, analytical scales, tweezers, cutter, masking tape, autoclave, laminar air flow, rack culture, cover glass, glass objects, microscope, digital cameras, and stationery. The results showed the fungus that causes Fusarium wilt disease infecting tomato plants in the District of West Langowan is Fusarium sp. The incidence of Fusarium wilt disease on tomato plants in the District of West Langowan is Tumaratas village average of 6.16%, the village Raringis average of 8.66%, and the average village Kopiwangker 9.61%. The highest incidence of the disease an average of 13.66% while the lowest incidence of tomato plants with an average of 4.33%.Keywords : Tomato plant, Fusarium sp.
INSIDENSI PENYAKIT TUNGRO PADA TANAMAN PADI SAWAH DI KECAMATAN TOMOHON BARAT KOTA TOMOHON Livita C. Tamuntuan; Guntur S.J. Manengkey; Henny V.G. Makal; Max M. Ratulangi
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
DIAGNOSIS DAN INSIDENSI PENYAKIT REBAH KECAMBAH PADA TANAMAN KACANG TANAH (Arachis hypogaea) DI KABUPATEN MINAHASA Elisca A. Bullele; Max M. Ratulangi; Guntur S.J. Manengkey; Henny V.G. Makal
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.
EFEKTIVITAS MIKROORGANISME ANTAGONIS TERHADAP PENYAKIT KARAT PUTIH PADA TANAMAN KRISAN (Chrysanthemum morifolium Ramat) DI KOTA TOMOHON Aprilia N. Rares; Emmy Senewe; Guntur S.J. Manengkey; Max M. Ratulangi
COCOS Vol. 6 No. 10 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i10.8217

Abstract

ABSTRACT Chrysanthemum or Chrysanthemum marifolium Ramat is one of the types of cut flowers have bright market prospects. As one of the types of ornamental plants, dubbed "King of Cut Flowers" besides having a shape and color which is very interesting, this plant has already started a lot of fans. Diseases that attack chrysanthemum eg rust disease caused by the fungus Puccinia sp. Damage results because this rust disease attacks especially on susceptible plants can reach 100% or crop failure. Rust diseases Puccinia sp. This allegedly carried on planting material (seeds) that has spread to many locations planting chrysanthemums. Tomohon is a center for the production of ornamental plants, especially chrysanthemum in North Sulawesi. Preliminary observations in planting chrysanthemums in Tomohon showed white rust disease. The purpose of this study was to look at and examine the effectiveness of microorganisms antagonistic Trichoderma sp., Pseudomonas fluorescens and Paenibacillus polymyxa to disease chrysanthemum white rust on research was conducted by using the method of randomized block design with four treatments namely A control treatment without application of antagonistic microorganisms, treatment B the application of microorganisms antagonistic Trichoderma sp., the treatment C with application of microorganisms antagonistic P. fluorescens and treatment D with application of microorganisms P. polymyxa. This treatment was repeated 5 times. Rating affected leaves using index calculation disease (severity). The variables measured are severity of affected leaves, leaf number and plant height. The results showed that of some microorganisms are used, equally effective in controlling the disease chrysanthemum white rust is antagonistic microorganism Trichoderma sp. with the value of the average severity of the last observation was 17.71%, followed by P. polymyxa with the average value of 26.78% last severity. Furthermore, the third treatment antagonistic microorganisms do not give effect to the number of leaves and plant height.  Keyword: Chrysanthemum, P. horiana, Trichoderma sp., P. fluorescens, P. polymyxa
INSIDENSI PENYAKIT BUSUK BUAH PADA TANAMAN PALA (Myristica fragrans H) DI KECAMATAN LEMBEH SELATAN ( Yunita S. Najoan; Max M. Ratulangi; Emmy Senewe
COCOS Vol. 7 No. 4 (2016)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v7i4.12595

Abstract

ABSTRACTThis research aims to study the incidence of black pod disease in plants nutmeg (Myristica fragrans H) in the district of South Lembeh for 3 months ie from January to April 2015. Laboratory studies conducted at the Laboratory of Microbiology and Plant Pathology, Faculty of Agriculture Unsrat Manado and in the field, namely in Subdistrict South Lembeh.Research in the laboratory to determine the fungal pathogen nutmeg pod disease while in the field to determine the incidence of the disease is carried out in the village Papusungan, Kelapa Dua village, village Mawali. To study the incidence of the disease by the method of survey and sampling deliberate on nutmeg experiencing symptoms of dry rot and wet rot.Dried fruit rot disease symptoms in the nutmeg that is, the fruit of pain at first seem small, round spots, the center line of approximately 0.3 cm, this part is brown and settles (concave). The results showed that the characteristic of fungal pathogens causing rot diseases dried fruit on nutmeg in District Lembeh Southern namely Stigmina myristicae, observation of this fungus directly seen in the fruit field diseased fruit rot dried and identified under a microscope. the symptoms of fruit rot disease wet first emerged at the base of the fruit, the affected part color becomes brown, spotting developments rapidly that within a few days its center line has reached 2.5 cm, fruit ill not be concave. the disease is caused by the fungus Colletotrichum gloeosporioides, this fungus konidium greenish brown, oval-shaped.The results of the study the incidence of rot diseases caused by pathogenic fungi, in the field there is a difference incidence of black pod disease caused by a fungal pathogen at different locations, highest average incidence of dried fruit rot 7.90%, and 12.27% wet rot.Key Words : Incidence, Rotten Fruit , Nutmeg
UJI ANTAGONISME Trichoderma sp. TERHADAP Colletotrichum capsici PENYEBAB PENYAKIT ANTRAKNOSA PADA CABAI KERITING SECARA In Vitro Ibnu Khairul; Vivi B. Montong; Max M. Ratulangi
COCOS Vol. 9 No. 6 (2017)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i2.20109

Abstract

ABSTRACT  Colletotrichum capsici is one of the fungi that can cause anthracnose disease in chili plants. Trichoderma sp. is an antagonistic fungus that has the potential to control anthracnose disease. This study aims to determine the growth and development of the fungus Trichoderma sp. and Colletotrichum capsici pathogenic fungi as well as the percentage of inhibition of Trichoderma sp. fungus. against the Colletotrichum capsici fungus. Testing using dual culture method on Potato Dextrose Agar media to know the percentage of inhibition.The results of this study showed that the colony of Trichoderma sp. able to inhibit the growth of Colletotrichum capsici fungal colonies with an average percentage of 2.82% inhibition on the third day after inoculation; 70.28% on the fourth day after inoculation and 100% on the fifth day after inoculation.  Keywords: Percentage, Colletotrichum capsici, Anthracnose
EFEKTIFITAS ESKTRAK PUTRI MALU, BAWANG PUTIH, DAN LENGKUAS TERHADAP PENYAKIT KARAT PUTIH (Puccinia horiana Henn.) PADA PEMBIBITAN TANAMAN KRISAN (Chrysanthemum sp.) Sandra O. K. Kalrengsang; Bernadeth V. Montong; Max M. Ratulangi
COCOS Vol. 14 No. 3 (2022): EDISI JULI-SEPTEMBER 2022
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v8i8.37308

Abstract

ABSTRACTChrysanthemum (Chrysanthemum sp.) is an ornamental plant that produces flowers that havehigh economic value. Chrysanthemum flowers have the potential to be developed because they are ingreat demand by the public in terms of beautiful shapes and colors. One of the important stages inchrysanthemum cultivation is seeding. The main problem in chrysanthemum farming is the attack ofwhite rust caused by a fungus (P. horiana) starting from seedling to harvesting. The use of plantextracts as alternative pesticides has many advantages and benefits. Plants that have the potential tobe used as botanical pesticides include mimosa, garlic and galangal. This study aims to determine theeffectiveness of giving the extracts of mimosa, garlic and galangal in chrysanthemum plant nurseriesto suppress white rust disease caused by the fungus P. horiana. This research was carried out usingan experimental design, namely a completely randomized design (CRD) which consisted of 4 (four)treatments and 4 replications, namely K (control), P1 (20% mimosa extract), P2 (20% garlic extract),and P3 (20% galangal extract). Based on the results of observations of the symptoms of white rust (P.horiana) the upper surface of the leaves at first in the form of yellow spots which gradually changedcolor to dark brown, then on the lower surface of the leaves can be seen the presence of pustules thatare pink, and long Over time the pustules will get bigger and then turn white. The highest percentageof attacks was in the control (K) 10.08%, the garlic extract treatment 20% (P2) 4.27%, then followedby the 20% galangal extract treatment (P3) 3.33%, and the mimosa extract treatment 20% (P1)0.96%. The results showed that the use of extracts of Putri malu, garlic and galangal was able tosuppress white rust disease (P. horiana) in chrysanthemum plant nurseries, with the best treatment insuppressing white rust disease (P. horiana) which was mimosa extract 20% (P1 ) with attackpercentage : 0.96%, followed by galangal extract (P3) : 3.33% and garlic extract (P2) : 4.27%. Inaccordance with the results of the research that has been carried out, it is necessary to carry outfurther research on the use of Mimosa Extract, Garlic and Galangal against white rust (P. horiana) inchrysanthemum plant nurseries with higher concentrations and in other varieties of chrysanthemumseedlings.Keyword : effectiveness, extract, mimosa, garlic, galangal, chryns, white rust disease
Co-Authors Aprilia N. Rares Aprilia N. Rares, Aprilia N. Bernadeth V. Montong Caroulus S. Rante Daisy S. Kandowangko Dantje T. Sembel Dantje Terno Sembel E. Benson E. R Meray Elisabet R.M. Meray Elisca A. Bullele Elisca A. Bullele, Elisca A. Emmy Senewe Frida Towaki G. Carner Guntur S.J. Manengkey Henny V.G. Makal Ibnu Khairul Kalrengsang, Sandra O. K. Livita C. Tamuntuan Livita C. Tamuntuan, Livita C. M. Hammig M. Shepard Max Tulung Montong, Bernadeth V. Moulwy F. Dien Muhammad Fadly Syam Sandra O. K. Kalrengsang Vivi B. Montong Yunita S. Najoan Yunita S. Najoan, Yunita S.