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All Journal Agrotrop : Journal on Agriculture Science International Journal of Biosciences and Biotechnology Buletin Udayana Mengabdi Bumi Lestari E-Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA Caraka Tani: Journal of Sustainable Agriculture Nandur Advances in Tropical Biodiversity and Environmental Sciences

I Ketut Suada

Faculty Of Agriculture, Udayana University, Denpasar, Indonesia

Author-ID : 2928193

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Education Energy Environmental Science Immunology & microbiology Medicine & Pharmacology Veterinary Other

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Respon Pertumbuhan dan Hasil Tanaman Jagung Manis terhadap Dosis Spora Endomikoriza Indigenus MARLIN MARHAENI PE; I NYOMAN RAI; I KETUT SUADA
Agrotrop : Journal on Agriculture Science Vol 11 No 1 (2021)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/AJoAS.2021.v11.i01.p10

Response of Growth and Yield of Sweet Corn to Dosage of Spores of Indigenous Endomycorrhizae. Endomycorrhizae is a form of mutualism association between fungi (myces) and roots (rhiza) of higher plants. The symbiotic relationship that occurs at the roots is mutually beneficial. Plants can provide carbon organic compounds for fungal growth, whereas fungi benefit plants by increasing nutrient uptake, water, producing enzymes, antibiotics and other compounds given to host plants. The study was conducted to know the effect of dosage of spores of endomycorrhizae indigenous to growth and yield of sweet corn. The experiments were carried out in laboratories and greenhouses. The design used was a completely randomized design with one factor namely the dose of spores of endomycorrhizae consisting of three levels, i.e. D0 = without inoculation of endomycorrhizae, D1 = 75 spores of endomycorrhizae/plant, and D2 = 150 spores of endomycorrhizae/plants. The results showed that dose of spores of endomycorrhizae treatment had a significant effect on growth and yield of sweet corn. The highest fresh weight of cob was obtained at a dose of 150 spores/plant, namely 181.33 g / plant. Based on the results of this study, it is necessary to conduct research in the field using a dose of 150 spores of endomycorrhizae per plant.

Respons Pertumbuhan Bibit Salak (Salacca edulis L.) terhadap Dosis Spora Endomikoriza pada Media Pembawa Pasir Vulkanik dan Pasir Laut DEWA AYU ARI FEBRIYANTI; I WAYAN WIRAATMAJA; I KETUT SUADA
Agrotrop : Journal on Agriculture Science Vol 10 No 2 (2020)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/AJoAS.2020.v10.i02.p04

Response of Salak Seedling (Salacca edulis L.) Growth to Endomycorrhizal Spore Doses on Volcanic Sand and Sea Sand Carrier. Endomycorrhizae has several benefits, such as increase water absorption and nutrients of plant, protect plants from root pathogens and toxic substances, play a role in improving soil structure, and increase nutrient solubility. This study aimed to determine the growth response of salak seedlings to doses of endomycorrhizal spores in media carrying volcanic sand and sea sand. This study used a factorial randomized block design (RBD) with two treatments i.e. the number of spores and the type of carriers media. The results showed no significant interaction between the number of mycorrhizal spores doses with the carrier media on all observed variables. Spores doses significantly affected stem diameter and root mycorrhizal infection variables. The highest stem diameter was achieved at the dose of 75 spores that was 1.60 cm which was significantly different from control (1.28 cm), whereas the highest root infection was obtained at the dose of 225 spores (92.50%) which significantly higher than control (36.25%). At the observation of 4 MAP (month after planting) the highest root infection was obtained at the dose of 150 spores (82.50%) compared to control (10.00%). Volcanic sand carrier media produced the highest plant dry weight (3.59 g) which was significantly different to the sea sand (2.43 g).

Induksi Mutasi Tanaman Cabai Merah (Capsicum Annuum L.) dengan Ethyl Methanesulfonate pada Berbagai Tingkat Waktu Perendaman I MADE AGUS WIARTANA; MADE PHARMAWATI; I KETUT SUADA
Agrotrop : Journal on Agriculture Science Vol 4 No 1 (2014)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (30.032 KB)

Induction of Mutation of Red Chili (Capsicum Annuum L.) Using Ethyl Methanesulfonate at Several Soaking Periods.One way to increase genetic variation is through induced mutation usingchemical mutagen. Ethyl methanesulfonate (EMS) is a chemical compound that can cause mutationsand commonly used in plant. In this study seeds of red chili were treated using EMS 1% through seedsoaking. Seeds of red chili were soaked with EMS 1% in phosphate buffer pH 7 for 6, 9, 12 and 15hours at room temperature. As control, seeds were soaked in phosphate buffer pH 7. This study aimsto evaluate, physiological and reproductive characters of plants after treated with EMS. Experimentwas conducted in an open field with 5 replicates for each treatment. Results showed that concentrationof chlorophyll a, b and total chlorophyll increased in plants derived from seed treated with EMS 1% for9 hours compared to control and other soaking periods. Soaking seeds with EMS 1% for 12 hoursincreased viability of pollen compared to control and other treatments. The first time of floweringoccurred earlier at 6 and 9 hours soaking period.

Uji Adaptasi Padi Sawah (Oryza sativa L.) Galur Harapan terhadap Hasil dan Ketahanan Penyakit Tungro di Subak Lepang, Desa Takmung, Kabupaten Klungkung PUTU SUGITA; GEDE WIJANA; I KETUT SUADA
Agrotrop : Journal on Agriculture Science Vol 8 No 1 (2018)
Publisher : Fakultas Pertanian Universitas Udayana

Adaptation Test of Paddy Rice (Oryza sativa L.) Expected Line Against Results and Disease Resilience Tungro Disease in Subak Lepang, Takmung Village, Klungkung Regency. Adaptation test of expected line paddy (Oryza sativa L) on its yield and tungro-resistance in Subak Lepang were conducted from July to September 2016. The aims of this test were to examine the growth and productivity of expected line paddy and its resistance to tungro. Twelve lines and two comparated varieties were set using Randomized Block Design. Dependent variable were growth, yield and age of 50% productive spikelets were gain, duration of yield, number of panicles, length of panicle, number of filled spikelets in each panicle, number of empty spikelets in each panicle, total spikelets, sweed set, weight of 1000 spikelets, weight of 14% water content of 1000 spikelets, weight of dry spikelets in a hectare (ton) and precentage of tungro’s invation. Statistical analisis showed that BP16732E-1 as expected line was well adapted to test, which were give better growth, yield and tungro resistency, and 13.139% higher yield compared to Ciherang variety. Future research on adaptation in different season and ecosystem should be conducted to determine this strain as new supreme strain.

Hubungan Antara Keragaman Gulma dengan Penyakit Bulai pada Jagung (Zea mays L.) Stadium Pertumbuhan Vegetatif I MADE SUDARMA; I KETUT SUADA; KETUT AYU YULIADHI
Agrotrop : Journal on Agriculture Science Vol 2 No 1 (2012)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (81.682 KB)

Weeds play an important role in the spread of downy mildew disease, competition, and lower cropyields of corn. Research using the survey method in 3 locations of Sanur village, Denpasar City. Eachlocation is taken 5 samples, and each sample area was 1m2, which was arranged diagonally. Forweeds identification was using reference i.e. Weeds of rice in Indonesia, and identification of downymildew disease using reference i.e. Maize Disease: A Guide for Field Indentification and microscopically,while the weeds diversity was determined based on Diversity Index of Shannon-Wiener. Relationshipbetween number of weed species and weed populations, and disease incidence were determined byregression and correlation analysis. Weed diversity on ecosystem of maize in vegetative stage is verylow with the diversity index of 0.779, this means weed ecosystem unstable, and dominated by a particularweed species was Paspalum commersonii Lamk. (Fam. Poaceae/Graminaceae) of 23.3%, with thedominance index of 0.709. Relationship between the number of weed species and disease incidence ofthe downy mildew disease was highly significant (P<0,01), while the relationship between weed populationand disease incidence of the downy mildew disease is not significant. Plant height and leaf number ofmaize was influenced by the type of weed, but weed populations only affect plant height of maize invegetative stage (V3-V11).

Pengendalian Getah Kuning Manggis Menggunakan Ekstrak Rumput Laut dan Pemupukan Kalium I KETUT SUADA; NI WAYAN SUNITI
Agrotrop : Journal on Agriculture Science Vol 5 No 1 (2015)
Publisher : Fakultas Pertanian Universitas Udayana

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The Control of Mangosteen Yellow Latex Using Seaweed Extract and Potassium Fertilizer. The yellow latex disease decreases fruit quality of mangosteen because of exogenic latex causes dirty fruit and the endogenic latex makes the bitter fruit taste, then it does not deserve to be consumed. The causal agent of the disease was Verticillium alboatrum, Fusarium oxysporum, and Pestalotia macrotricha. Control using synthetic chemical for the fungus is severely decreasing the quality of the environment, therefore the use of organic agent such as botanical fungicide and the use of potassium fertilizer is recommended. The purpose of this research is to find the dose of potassium fertilizer and sea weed extract to decrease yellow latex disease of mangosteen fruit. The research was done in-vivo in the field with indicator of the decrease of yellow latex incident. The research showed that potassium fertilizer of 1.5 kg/plant combine with 1% extract was the best treatment with the lowest yellow latex incident of 9.4%. The treatment effective decreasing the disease of 56.3% compared to control and 56.9% when it is compared to 0,2% Antracol fungicide.

Kultur In-vitro Anggur Laut (Caulerpa lentilifera) dan Identifikasi Jenis Mikroba yang Berasosiasi NI WAYAN SUNITI; I KETUT SUADA
Agrotrop : Journal on Agriculture Science Vol 2 No 1 (2012)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (44.878 KB)

This research aims to find the best condition for the cultivation of fragment of Caulerpa lentilifera, to determine the factors that influence its growth in-vitro, and to identify the types of microbes associated. The study was conducted at the Marine Tech Laboratory and Marine Biology Laboratory of Udayana University. The study begins with the in-vitro culture of C. lentilifera seaweed at the incubator and the tank. The observations of the morphology and the seaweed growth to determine the suitable conditions, the influens of growth factors and microscopic observation to determine the types of microbes were associated. The best results in in-vitro culture in incubator was achieved by provision of 2 ml of PES in 500 ml of sea water, 5000 lux of light intensity, 12 hours irradiation and 100% medium replacement once a week. Best results in-vitro culture in the using net method was achieved by provision of 3500 lux light intensity, 12 hours irradiation and 70% culture replacement once a week. The microbes associated with the C. lentilifera came from the protozoa phylum, flagellate, and cilliata classes.

Pengaruh Varietas dan Waktu Penyiangan Gulma Terhadap Pertumbuhan dan Hasil Tanaman Kacang Hijau (Phaseolus Radiatus L.) EUSEBIO GOMES; GEDE WIJANA; I KETUT SUADA
Agrotrop : Journal on Agriculture Science Vol 4 No 1 (2014)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (32.839 KB)

The Effects of Variety and Weeding Times on Growth and Yield of Mungbean (PhaseolusRadiatus L.)The mungbean have a great potential as a food ingredient mixture of refined productsand has certain competitive advantages over other types of beans. Mungbean production in East Timoris still low and has not been able to meet the needs of the market. Therefore, weed control and selectionof good varieties of mung beans is one of the determining factors in the increased production of mungbean.The objective of the study was to determine the effect of time of weeding on the growth and yield ofseveral varieties of mungbean. The study was conducted at the Pilot Suco Hera Sub-distrito Cristo Rei,Dili-Timor Leste. It used a randomized block design with two factors. The first factor was type ofvarieties of mungbean and the second factor was the weeding time. Factor of types of varieties consistedof three, namely: VL = Local Variety, VM = Merak variety, VG = Gelatik variety, while factor ofweeding times consists of PO = No weeding, P1 = weeding at 2 and 4 weeks after planting, P2 =weeding at 3 and 5 weeks after planting, with three replications. The results showed that weeding timeaffected the outcome of drying seed dry weight per hectare. Weeding time at 2 and 4 weeks afterplanting had a better dry weight of seed i.e 1.09 g, compared to those of weeding at 3 and 5 weeksafter planting. The use of different varieties showed that Merak variety had drying seed dry weight of1.16 tons ha-1, Gelatik variety was 1.09 tons ha-1, and the local variety was 0.97 tons ha-1.

KEEFEKTIVAN EKSTRAK BIOTA LAUT AGLAOPHENIA TERHADAP AKTIVITAS ENZIM EKSTRASELULER DAN KANDUNGAN PROTEIN FUSARIUM SERTA PERSENTASE BUSUK BATANG VANILI I Ketut Suada
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 11 No. 2 (2011): SEPTEMBER, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA
Publisher : Universitas Lampung

The aim of this research was to investigate the effect of Aglaophenia extract on the activity of cellulase and pectinase, protein content of Fusarium, and percentage of vanilla stem rot. This reasearch was carried out in-vitro with concentration of extract of 2000, 1000, 500, 250, 125, 63, and 0 ppm (w/v). The treatments were also applied on vanilla plant to determine their effect on the stem rot incidence. The results exhibited that the higher the concentration of the extract given, both enzymes activity and mycelial protein content of Fusarium decreased. The decrease of enzymes activity resulted in the decrease of vanilla stem rot percentage. The effectiveness of the extract to suppress stem rot was higher than mancozeb, therefore, the extract could be used as a control agent against vanilla stem rot.

Pembentukan Mutan Hipovirulen Fusarium oxysporum f.sp cubense Penyebab Layu pada Tanaman Pisang (Musa paradisiaca L.) Menggunakan Asam Nitrat Fransen Sinaga; Made Sritamin; I Ketut Suada
Nandur Vol 1 No 1 (2021)
Publisher : Fakultas Pertanian, Universitas Udayana

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The Formation of Fusarium oxysporum f.sp. cubense Hypovirulent Mutant Causes Wilt in Banana Plants (Musa Paradisiaca L.) Using Nitric Acid. Fusarium wilt disease is a type of disease that can cause a quantitative decrease in banana plant production. Fusarium wilt disease is classified as a disease that is difficult to control, because it is underground and forms chlamydospores. Control of Fusarium with biological agents has a positive impact on the environment, one way of biological control using antagonistic microorganisms. Biological agents used are biological agents that are hypovirulent. Hypovirulent properties will compete with host pathogens in competition for space, food, and toxin excretion, thereby suppressing fusarium fungi to enter the vascular tissue of banana plants. Chemical mutagens are mutagenic agents that can cause permanent changes in the composition of DNA. Nitric acid can cause DNA cross-linking in the same strands. Nitric acid was reported as a suitable mutagen to increase the production of lactic acid Lactobacillus delbrueckii. Nitric acid can change the acid-base pair of organisms so that mutations occur. obtained a mutant that is hypovirulent which can suppress the growth of fusarium fungus as a pathogen in banana plants. The results showed that the FOC fungus isolates with 1% treatment had hypovirulent properties compared to 0.05%, 0.1% and 0.5% treatments. Hypovirulent properties are derived from the timing of symptoms. In mutant FOC, 1% of symptoms appeared on day 6. The growth of hypovirulent mutants was expected to be higher than that of pathogenic FOCs. Based on the research, it was found that the fungi had the lowest pathogenicity level, as well as high diameter growth, total spore density, and high amount of inhibition.

Co-Authors A.A.A.A.S. Sunari A.A.N.G. Suwastika Aida Lousie Tenden Rompis Aleksey Stepanov Anak Agung Ngurah Gede Suwastika ANDRIANI ANDRIANI DELVIANA PANJAITAN Dewa Ayu Ari Febriyanti Dewa Ngurah Suprapta DWI SURYANTO EUSEBIO GOMES Fransen Sinaga GEDE WIJANA Gusti Ayu Yuniati Kencana HERLINDAH CHOIRI I Gede Ketut Susrama I GEDE PUTU WIRAWAN I GEDE SUSRAMA I Gusti Agung Ayu Suartini I Gusti Ayu Diah Yuniti I Gusti Made Krisna Erawan I Gusti Ngurah Sudisma I Kadek Ngestika Pradnyana I KADEK NGESTIKA PRADNYANA I MADE AGUS WIARTANA I Made Ary Putra Nata I Made Ary Putra Nata I Made Merdana I Made Parama Nanda Mahatya I MADE SUDANA I MADE SUDANA I MADE SUDANA I MADE SUDARMA I MADE SUDARMA I Made Sukada I Nyoman Adi Khrisna Wijaya I NYOMAN MANTIK ASTAWA I NYOMAN RAI I Nyoman Suarsana I Nyoman Suartha I Putu Agus Santika Putra I WAYAN BUDIASA I WAYAN EKA ADI WIRAWAN I Wayan Suardana I WAYAN WIRAATMAJA I. A. P. Apsasri I. B. Ardana I.H. Utama I.W. Batan IDA AYU GEDE DIANGGI ADIATHY Ida Bagus Ngurah Swacita IRMA SELVYANA Br. SITEPU KADEK INTAN SURYANINGSIH Kadek Karang Agustina KETUT AYU YULIADHI M. Praborini M.D. Rudyanto MADE PHARMAWATI MADE SRITAMIN MARLIN MARHAENI PE N.W.S. Sutari Nataliya Shchegolkova NI KADEK LIA SWANDEWI NI LUH GEDE SRIYANTI NI LUH PUTU SONIA SAVITA DEWI Ni Made Ayuratih Utami NI MADE PRITIYANTI DEWI Ni Made Puspawati Ni Made Savita Rasjman Rasjman NI MADE TRIGUNASIH NI NYOMAN ARI MAYADEWI Ni Nyoman Werdi Susari Ni Putu Deana Kanaya Sahrani NI PUTU LINDA SUNARIASIH NI PUTU MERRY SENI ANTARI Ni Putu Ratna Dewi Damayanti NI WAYAN SUNITI Oleg Gladkov Olga Yakimenko Onesimus Ke Lele PUTU AYU MEITA YUDIA DEWI Putu Ayu Sisyawati Putriningsih PUTU SUGITA Rodion Poloskin Romy Muhammad Dary Mufa SANGGUL HUTASOIT SHEILA SIMANJUNTAK T. Sari Nindia TRISNA AGUNG PHABIOLA VEDERIS LEUNARDUS VICKY TANDYA WAYAN ADIARTAYASA

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