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AGRITROP
Published by Universitas Udayana
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Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
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Articles 40 Documents
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KLASIFIKASI TANAH DESA TARO, KECAMATAN TEGALLALANG KABUPATEN GIANYAR BERDASARKAN SISTEM TAKSONOMI TANAH (SOIL CLASSIFICATION OF TARO VILLAGE, TEGALLALANG DISTRICT, GIANYAR REGENCY) KUSMIYARTI, TATI BUDI; BAYU AJI, HIMAWAN; BHAYUNAGIRI, IDA BAGUS PUTU
AGRITROP Vol. 29, No. 4 Desember 2010
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Abstract

The purpose of the research was to classify of soil on Taro Village, Tegallalang District, Gianyar Regency. Soil survey methods and analysis in laboratory were used in this research. Some parameters of soil properties were observed: soil morphology in the field, and physical, chemical and mineralogical soil properties in the laboratory. Soil classification based on Soil Taxonomy System by using Keys to Soil Taxonomy (2003). There are four families in Taro village, namely: (1) Ruptic-Alfic Dystrudepts, coarse loamy, mixed, isothermic; (2) Aeric Epiaquepts, coarse loamy, mixed, isothermic; (3) Humic Eutrudepts, coarse loamy, mixed, isothermic; (4) Typic Eutrudepts, coarse loamy, mixed, isothermic.
Pertumbuhan Akar Kedelai pada Cekaman Aluminium, Kekeringan dan Cekaman Ganda Aluminium dan Kekeringan HANUM, CHAIRANI; MUGNISJAH, WAHYU Q.; YAHYA, SUDIRMAN; SOPANDY, DIDI; IDRIS, KOMARUDIN; SAHAR, ASMARLAILI
AGRITROP Vol. 26, No. 1 Maret 2007
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Abstract

The objective of this research was to study the change of vegetative growth of root on some genotypes soybeanof aluminium toxicity, drought stress, and double stress (Al toxicity and drought stress). Research in rooting systemof soybean is hoped to get more attention, especially for supporting concept of new plant type for high yieldingpotential. Six genotypes of soybean (Slamet, Sindoro, Dieng, Sinyonya, Lumut, and Wilis), treated with aluminiumsaturated (Al 25%, Al 50%, and Al 75%) and field capacity (80% FC and 40% FC). Response of growth vegetativeidentified perception by root dry weight. Result of the study show that only one from six that is genotype Wiliswas tolerant at aluminium toxicity, drought stress, and double stress.
PENGENDALIAN PENYAKIT BUSUK BUAH KAKAO DENGAN PESTISIDA NABATI SUDARMA, I MADE; SUPRAPTA, D. N.
AGRITROP Vol. 28, No. 1 Maret 2009
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Abstract

Pod rot disease in Cacao (Theobroma cacao) caused by Phytophthora palmivora has been known to cause serious damage at cacao-growing area in the world. The disease can cause crop loss until 90%. Hitherto cacao farmer controls disease only on usage of synthetic pesticide. Therefore important is performed a operation research of disease with other alternative, like usage of leaf extract Piper betle and clove flowers (Eugenia caryophillata), as botanical pesticide. Research has been conducted in Pulukan village, Sub-Province Jembrana in January until April 2006, to study botanical pesticide effectivity (plant extract) to control pod rot disease. Research applies completely randomized block design, with four treatments and six replications, causing is required 24 experiment units. Every re-attempt unit thrice and ten tree pears observed as sample. Disease percentage is observed every one week once in each treatment. Results of the experiment indicated that leaf extract of P. betle and clove flowers effective controls pod rot disease (alone or in combination). The extract mixture P. betle and clove flower (combination) can suppress disease until 64,57 %, clove flowers extract (alone) 33,33% and synthetic pesticide (Dithane M45) equal to 60,40%. Result of this depicts treatment tested is usable to reduce pathogen pod rot disease of cacao.
Preferensi Diaphorina citri Kuwayama (Homoptera: Psyllidae) pada Beberapa Jenis Tanaman Jeruk WIJAYA, I NYOMAN
AGRITROP Vol. 26, No. 3 September 2007
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Abstract

The research was conducted at Laboratory Pest and Disease, Faculty of Agriculture Udayana University. Thepurpose of the research were to investigate preference of Diaphorina citri on the diference kind of host plant. Theresult of of this study showed that D. citri highly prefers CVPD infected citrus cv. siam, but the highest fecundatyof D. citri was on kemuning plant. Population growth of D. citri performed highly at CVPD infected citrus cv.siam and kemuning.
HUBUNGAN ANTARA TEKSTUR TANAH DENGAN KADAR FOSFAT, KALIUM DAN KAPASITAS TUKAR KATION TANAH DARI BEBERAPA CONTOH TANAH DI BALI NARKA, I WAYAN
AGRITROP Vol. 26, No. 2 Juni 2007
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Abstract

A laboratory experiment about correlation of texture (sand, silt and clay fractions) to phosphate (P), potassium (K) content and Cation Exchange Capacity (CEC) of soil was carried out at Soil Laboratory Faculty of Agriculture Udayana University in May until October 2006. Soil samples were taken from regencies of Bali and analyzed some properties of soil such as: soil texture, potassium, available P content and CEC of soil. Soil texture was analyzed with pipet method, potassium content with Bray I method, available P content with Bray I method and CEC with NH4OAc.saturation method. Pearson correlation method was used in this experiment to study the correlation of sand, silt and clay fractions to potassium, available P content and CEC of soil. The result of the experiment showed that, there are highly significant correlation between sand fraction and potassium, available P content and CEC of soil with coefficient correlation (r) of : -0,427**, -0,314* and -0,719** , respectively. Correlation between clay fraction and potassium content, CEC of soil with coefficient correlation (r) of : 0,430** and 0,661**, respectively. Between silt fraction and potassium, available P content and CEC of soil were not significant correlation, with coefficient correlation (r) : 0,127; 0,257 and 0,256, respectively . Between potassium content and CEC of soil showed a highly significant correlation with coefficient correlation (r) = 0,383**. Step wise analyzed showed that , potassium content was significantly influenced by clay fraction, while available P and CEC of soil were significantly affected by sand
KETAHANAN BEBERAPA VARIETAS CABAI TERHADAP CUCUMBER MOSAIC VIRUS (CMV) (RESISTANCE OF SEVERAL CHILI VARIETIES ON CUCUMBER MOSAIC VIRUS (CMV) PUSPAWATI, N. M.; ARI MAYADEWI, N.N.
AGRITROP Vol. 29, No. 1 Maret 2010
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Abstract

Mosaic disease outbreaks on chili (Capsicum annum) associated with Cucumber Mosaic Virus (CMV) is serious worldwide. The use of resistant cultivars is an effective control to reduce the loss of yield caused by virus’s infections. The objective of this study is to detect the resistant characters of CMV in chili using OPH-17 and OPA-20 RAPD primers. The inoculation of CMV in PSPT-C11, C17-PSPT, ICPN 7 # 3 and 1 Chilibangi 1 varieties cause systemic mosaic symptoms vary from mild mosaic to the mosaics with malformations. PSPT-C11 varietiy showed rather resistant, while the varieties PSPT-C17 and Chilibangi 1 are susceptible, and ICPN 7 # 3 is very susceptible. OPH-17 and OPA-20 primers could not be used to determine the resistance differences against CMV in PSPT-C11, C17-PSPT, ICPN 7 # 3 and Chilibangi 1 varieties.
Parasitasi Trichogramma evanescens Westwood (Hymenoptera : Trichogrammatidae) pada Berbagai Tingkat Populasi dan Generasi Biakan Parasitoid terhadap Telur Penggerek Batang Jagung Ostrinia furnacalis Guenée PABBAGE, M.S.; TANDIABANG, J.
AGRITROP Vol. 26, No. 1 Maret 2007
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Abstract

The parasitoid T. evanescens was reared in the laboratory, then; one, two, three, four, five, six female parasitoidrespectively was released to one hundred eggs of ACB in the tube. The second experiment, the parasitoid wasreared in the laboratory until ten, fifteen, twenty and twenty five generations, than released to one hundred eggs ofACB. The observation was done five days after releasing parasitoid. The result of the experiment showed that themaximum parasitism on the eggs of ACB 53.2% at four female parasitoid per hundred eggs of ACB. The increaseof the number female parasitoid, the parasitism degree per one female parasitoid, and the emergence of the newparasitoid from egg were decreased. The parasitoid T. evanescens that reared in the laboratory by using substitutedhost Corcyra cephalonica was still effective up to tenth generations to control the eggs of ACB. Parasitoid thatrearing after tenth generations, the parasitism degree, the new emergence parasitoid from the egg of ACB andwalking or jumping speed of parasitoid was decrease.
Hubungan Kecepatan Angin dan Kelembaban Udara terhadap Pemencaran Konidium Cercospora nicotianae pada Tembakau RAFIQI TANTAWI, AHMAD
AGRITROP Vol. 26, No. 4 Desember 2007
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Abstract

One of the limiting factors in tobacco production is frogeye leaf spot, a fungal disease caused by C. nicotianae.Epidemic of this disease was supposed to have a close relationship with weather aspects, such as wind velocity,temperature, solar radiation intensity and relative humidity. An experiment was conducted to determine relationshipbetween wind velocity and relative humidity to conidial dispersal on tobacco. The experiment carried out at MycologyLaboratory, Study Program of Plant Pest and Disease, Faculty of Agriculture, UGM and two tobacco plantations inJember and Klaten. The results showed that conidia was dispersed by wind and can be trapped by Kiyosawa typeof wind vane rotary spore trap. Conidia were dispersed in dry, and moist, as well as wet months. During the dryand moist month, conidia was trapped since 06.00 a.m. the trapping reached its peak at 02.00-06.00 p.m., while inwet month at 10.00 a.m. to 14.00 p.m. Dry air condition was needed in conidium releasing. The number of conidiawas decreased when relative humidity increased.
Water Solubility and Physical Losses and Sulfur and Phosphorus from S-Coated Triple Superphosphates DANA, MADE
AGRITROP Vol. 26, No. 3 September 2007
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Abstract

Coated fertilizer must retain the coating during transport and handling, but the nutrients in the coat must bereleased readily in the soil to meet plant demand. Three experimental fertilizer where S is adhered to TSP granulesusing AD1, AD3 or AD2 adhesive were compared with a commercial S coated TSP, Hifert (HF) Goldphos-10.Fertilizer S loss from the granule was measured in a rotating drum friabilator. The highest particle loss was recordedwit HF, and there were no significant differences recorded between AD1, AD2 and AD3. Release of S from the coatedfertilizers was measured by placing the fertilizers between 500 pm nylon mesh and leaching with distilled waterat 20 mL min-1 for up to 96 h. In all release was fastest from AD1 and AD3, and the amount of Ca and P releasedfrom the granule was also highest with these two products. Granules were scanned in the electron microscope, andelectron microprobe both before and after leaching. Dispersion in distilled water was also recorded. The microprobescan confirmed the leaching data with more S remaining in the granule with HF than AD1 or AD3. These dataconfirm earlier studies that the method of adhesion of S to TSP can markedly alter the agronomic performance ofthe fertilizer.
ISOLASI JAMUR PEMBENTUK GUBAL PADA TANAMAN GAHARU (GYRINOPS VERSTEGII) (ISOLATION OF GUBAL FORMING FUNGI ON GAHARU (GYRINOPS VERSTEGII)) MEGA, I MADE; AGUNG PHABIOLA, TRISNA
AGRITROP Vol. 29, No. 4 Desember 2010
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Abstract

The study is aimed to explore the microbial isolates of agarwood (gubal gaharu)-forming plant aloes on ketimunan plant (Gyrinops verstegii). The study was coducted from June to October 2008 in the Laboratory of Soil Biology, Faculty of Agriculture, University of Udayana. The method used in this study were: the isolation of microbes with PDA medium, inoculation of isolate into ketimunan plants, evaluating the success of inoculation (injection). Parameters measured were: the color of mold, the color of agarwood/kemedangan, long agarwood, and the level of the smell of agarwood/kemedangan. The results showed that there were 14 species of fungi that able to form agarwood aloes on the plant ketimunan. All of these fungus were able to cause agarwood/kemedangan fragrant aloes, but the level of fragrance varies from slightly fragrant, fragrant, until very fragrant.

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