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INDONESIA
Agrikultura
Published by Universitas Padjadjaran
ISSN : 08532885     EISSN : -     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal Agrikultura terbit tiga kali setahun (April, Agustus dan Desember), memuat artikel hasil penelitian dan kupasan (review) orisinal hasil dari penelitian yang sebagian telah dilakukan penulis, dan komunikasi singkat.
Arjuna Subject : -
Articles 8 Documents
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Search results for , issue "Vol 26, No 1 (2015): April, 2015" : 8 Documents clear
Bioaktivitas Campuran Ekstrak Biji Barringtonia asiatica L. (Kurz.) (Lecythidaceae) dan Getah Azadirachta indica A. Juss. (Meliaceae) terhadap Larva Spodoptera litura F. (Lepidoptera: Noctuidae) Indah Meutia Arisanti; Danar Dono
Agrikultura Vol 26, No 1 (2015): April, 2015
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (543.826 KB) | DOI: 10.24198/agrikultura.v26i1.8458

Abstract

ABSTRACTBioactivity of mixed seed extract of Barringtonia asiatica l. (kurz.) (lecythidaceae) and sap of Azadirachtaindica A. Juss. (meliaceae) against larvae of Spodoptera litura f. (lepidoptera: noctuidae)Barringtonia asiatica and Azadirachta indica are known to have variety of chemical compounds that haspotency to be developed as botanical pesticides. The study aimed to determine insecticidal toxicity of B.asiatica seed extract and A. indica sap and their mixture. The experiment was carried out in the Laboratoryof Pesticides and Application Technology, Department of Plant Pests and Diseases, Faculty of Agriculture,Universitas Padjadjaran. The experiments were conducted either on toxicity test of the seed extract of B.asiatica and the sap of A. indica singly or their mixture based on the comparison of LC95. Toxicity testing wasperformed using a leaf-residue feeding method on the instar I of Spodoptera litura larvae. The resultsshowed that seed extractof B.asiatica has a moderate toxicity to S.liturawith the LC50 value of 0.491% andaffected body weight of the larvae. The sap of A.indicahas had slightly low toxicity with the LC50 value of1.310%. The mixture of B. asiatica seed extract and A. Indica sap (based on ratio of 4.1%of B. asiaticacompare to 4.9% of A. Indica) has LC50 value of 0.970% (slightly low toxicity) and the LC95 value of 15.99%that was antagonistic on the LC95 level with Cotoxicity Ratio value of 0.23% on 12 days after treatment.Keywords: Cotoxicity ratio, independent joint action, Barringtonia asiatica, Azadirachta indica, SpodopteralituraABSTRAKBarringtonia asiatica dan Azadirachta indica diketahui memiliki berbagai senyawa kimia yang berpotensidikembangkan sebagai pestisida nabati. Penelitian yang bertujuan untuk mengetahui toksisitas ekstrak biji B.asiatica dan getah A. indica serta campurannya telah dilakukan di Laboraturium Pestisida dan TeknikAplikasi, Departemen Hama dan Penyakit Tumbuhan, Fakultas Pertanian, Universitas Padjadjaran.Penelitian meliputi uji toksisitas ekstrak biji B. asiatica dan getah A.indica secara tunggal, dan pengujiancampuran ekstrak biji B. asiatica dan getah A.indica berdasarkan pada perbandingan LC95. Pengujiantoksisitas dilakukan dengan metode celup pakan pada larva instar I Spodoptera litura. Hasil penelitianmenunjukkan bahwa ekstrak biji B. asiatica bersifat toksik sedang terhadap S. litura dengan nilai LC50sebesar 0,491% dan berpengaruh terhadap bobot basah larva. Getah A. indica bersifat toksik ringan dengannilai LC50 1,310%. Campuran ekstrak biji B. asiatica dan getah A. indica berdasarkan rasio 4,1% B. asiaticaberbanding 4,9% A. indica memiliki LC50 sebesar 0,970% (toksisitas ringan) dengan LC95 sebesar 15,99% dandinyatakan bersifat antagonis pada LC95 dengan nilai Nisbah Kotoksisitas 0,23% pada 12 hari setelahaplikasi.Kata kunci: Nisbah Kotoksisitas, Kerja bersama bebas, Barringtonia asiatica, Azadirachta indica, Spodopteralitura
Sinergisme Ekstrak Piper aduncum dan Tephrosia vogelii terhadap Penggerek Batang Padi Kuning, Scirpophaga incertulas Muhammad Sigit Susanto; Djoko Prijono
Agrikultura Vol 26, No 1 (2015): April, 2015
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (319.77 KB) | DOI: 10.24198/agrikultura.v26i1.8454

Abstract

AbstractSynergism of Piper aduncum and Tephrosia vogelii Extracts against the Rice Yellow Stem Borer, ScirpophagaincertulasRice (Oryza sativa) is one of the important staple food crops in the world. One of the important pests on riceis the rice yellow stem borer (RYSB) Scirpophaga incertulas . One of the alternative control techniques thatcan be applied is by using botanical insecticides. The purpose of this study was to determine the synergismbetween Piper aduncum fruit and Tephrosia vogelii leaf extracts against RYSB larvae. P. aduncum and T.vogelii extracts, either tested separately or in mixtures with concentration ratios of 1:1, 2:1, and 1:2, wereeffective against RYSB larvae. The treatments with these extracts caused death in YRSB larvae at 72 hoursafter treatment in which the affected larvae showed internal tissue damage symptom. The most toxic testmaterial to RYSB larvae was P. aduncum and T. vogelii extract mixture with a concentration ratio of 1:2.LC50 and LC95 of P. aduncum extract were 0.175% and 0.126%, respectively, while those of T. vogelii extractwere 1.620% and 2.075%, respectively. P. aduncum and T. vogelii extract mixture with 1:1 ratio had LC500.056% and LC95 0.143%, while that with 2:1 ratio had LC50 0.025% and LC95 0.149%. LC50 and LC95 of themixture with 1:2 ratio were 0.016% and 0.083%, respectively. P. aduncum and T. vogelii extract mixture atthe three concentration ratios were more effective than P. aduncum and T. vogelii extracts appliedseparately and synergistic to RYSB larvae.Keywords: Botanical Insecticide, Piper aduncum, Scirpophaga incertulas , Synergism, Tephrosia vogelii .AbstrakPadi (Oryza sativa) merupakan salah satu komoditas penting pangan dunia. Salah satu hama penting padatanaman padi adalah penggerek batang padi kuning, Scirpophaga incertulas . Salah satu cara pengendalianyang dapat diterapkan adalah dengan menggunakan insektisida nabati. Tujuan penelitian ini adalahmenentukan sinergisme ekstrak buah Piper aduncum dan daun Tephrosia vogelii terhadap larva S.incertulas . Perlakuan ekstrak P. aduncum dan T. vogelii baik secara terpisah maupun campuran pada nisbahkonsentrasi 1:1, 2:1, dan 1:2 efektif terhadap larva S. incertulas . Perlakuan ini dapat menimbulkan kematianpada S. incertulas dengan gejala kerusakan jaringan larva instar 1 pada 72 jam setelah perlakuan. Bahan ujiyang paling beracun terhadap larva S. incertulas adalah campuran ekstrak P. aduncum dan T. vogelii dengannisbah konsentrasi 1:2. LC50 dan LC95 ekstrak P. aduncum masing-masing 0,175% dan 0,126%. Sementara ituLC50 dan LC95 ekstrak T. vogelii masing-masing 1,620% dan 2,075%. Campuran ekstrak P. aduncum dan T.vogelii pada nisbah konsentrasi 1:1 memiliki LC50 0,056% dan LC95 0,143%. Sementara itu campuran ekstraktersebut pada nisbah konsentrasi 2:1 memiliki LC50 0,025% dan LC95 0,149%. LC50 dan LC95 campuranekstrak tersebut pada nisbah konsentrasi 1:2 masing-masing 0,016% dan 0,083%. Campuran ekstrak P.aduncum dan T. vogelii pada ketiga nisbah konsentrasi lebih efektif dibandingkan dengan ekstraktunggalnya dan bersifat sinergis terhadap larva S. incertulas .Kata kunci: Insektisida Nabati, Piper aduncum, Tephrosia vogelii , Scirpophaga incertulas , Sinergisme.
Adsorpsi Paraquat dan Sifat Tanah pada Tiga Subgrup Tanah Akibat Pemberian Amelioran Rija Sudirja; Mahfud Arifin; Benny Joy
Agrikultura Vol 26, No 1 (2015): April, 2015
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (493.891 KB) | DOI: 10.24198/agrikultura.v26i1.8459

Abstract

ABSTRACTParaquat adsorption and Soil Properties on Three Soil Subgroups Due to Ameliorant ApplicationParaquat (Bipyridylium biclorida) is known as a highly toxic herbicide and quite widely used by the farmers. The material can be adsorbed by soil colloids and can contaminate soil and water. The study aimed to determine the ability of three of soil subgroups of different orders (Typic Hapludult, Typic Hapludand,and Chromic Endoaquert) to adsorb paraquat, finding the best kind of ameliorant in reducing residues, and studying its effect on corn crops. The study was conducted in two stages, namely (1) to test the maximum adsorption capacity of paraquat on the three of soil subgroups based on the Langmuir equation, and (ii) to study the influence of the type and ameliorant dose on three soil subgroups saturated with paraquat. Methods used were completely randomized design experiment nested models. The results of laboratory experiments showed that the topsoil layer of Typic Hapludands was dominated by halloysite and little amorphous clay minerals. While predominantly Typic Hapludult was dominated by kaolinite and little smectite. Chromic Endoaquert contained little kaolinite and was dominated by smectite. Saturation points in all three soil subgroups were 1.883 cmol kg-1, 20.833 cmol kg-1, and 9.346 cmol kg-1 paraquat, respectively. The type and dose of each ameliorant signifancty affected paraquat adsorption capacity, soil pH and electrical conductivity in all three soil subgroups, except for paraquat adsorption capacity and pH which were not affected in Typic Hapludults. The highest dose of activated charcoal adsorbed paraquat markedly higher compared with other treatments on Typic Hapludands, whereas Chromic Endoaquerts activated charcoal had the same effect with the zeolite, but higher than straw and control. Furthermore, on Typic Hapludults ameliorant did not significantly affect the adsorption capacity of paraquat, except when compared with controls.Keywords: Paraquat, soil subgroups, adsorption, ameliorant.ABSTRAKParaquat (Bipyridylium biclorida) dikenal sebagai herbisida yang sangat toksik dan pengunaannya cukup luas di kalangan petani. Bahan ini dapat diadsorpsi oleh koloid tanah dan dapat mencemari tanah dan air. Penelitian ini bertujuan untuk mengetahui kemampuan tiga subgrup tanah berlainan ordo (Hapludult Tipik, Hapludand Tipik, dan Endoequert Kromik) mengadsorpsi paraquat, menemukan jenis amelioran yang paling baik dalam menekan residu paraquat, serta mempelajari pengaruhnya terhadap hasil tanaman jagung. Penelitian dilakukan dalam dua tahap, yaitu (1) Uji kapasitas adsorpsi maksimum paraquat pada tiga subgrup tanah berdasarkan persamaan Langmuir, dan (2) pengaruh jenis dan dosis amelioran pada tiga subgrup tanah terjenuhi paraquat terhadap adsorpsi, pH, dan daya hantar listrik. Metode yang digunakan Rancangan Acak Lengkap model percobaan Tersarang. Hasil percobaan di laboratorium menunjukkan titik jenuh paraquat pada ketiga subgrup tanah tersebut masing-masing sebesar 1,883 cmol kg-1, 20,833 cmol kg-1, dan 9,346 cmol kg-1. Jenis dan dosis amelioran masing-masing berpengaruh nyata terhadap kapasitas adsorpsi paraquat, pH tanah dan daya hantar listrik pada ketiga subgrup tanah, kecuali kapasitas adsorpsi paraquat dan pH tidak dipengaruhi pada Hapludult Tipik. Arang aktif dosis 20% media tanah mampu mengadsorpsi paraquat nyata lebih tinggi dibandingkan dengan perlakuan lainnya pada Hapludand Tipik, sedangkan pada Endoaquert Kromik, arang aktif memiliki pengaruh yang sama dengan zeolit, tetapi lebih tinggi dari jerami dan kontrol.
Perkembangan Alternaria solani pada Tiga Varietas Tanaman Tomat A. Marthin Kalay; J. Patty; M. Sinay
Agrikultura Vol 26, No 1 (2015): April, 2015
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (473.068 KB) | DOI: 10.24198/agrikultura.v26i1.8455

Abstract

ABSTRACTDevelopment of Alternaria solani in three tomato varietiesAlternaria solani is a fungal plant pathogen that attacks tomatoes, potatoes, eggplant and peppers. Yieldlosses cause by this pathogen, especially in tomatoes, can reach up to 86% depends on grown tomatovarieties. This reaseach was aimed to examine the development of A. solani infection on three differenttomato varieties of Tombatu, Tyrana and Permata. The study was designed using a randomized block designand the observations included the proportion of the disease and the rate of infection. Results revealed thatthe highest development of the fungus A. solani occurred in Tombatu variety that reached 0.8445 andindicated the highest infection rate of 0.0810 per unit per day.Keywords: Alternaria solani , tomatoes, Tombatu, Tyrana, PermataABSTRAKAlternaria solani merupakan salah satu jamur patogen yang menyerang tanaman tomat, kentang, terung dancabai. Kerugian yang diakibatkan khususnya kehilangan hasil pada buah tomat dapat mencapai 86% yangsalah satunya bergantung pada varietas tomat yang ditanam. Penelitian ini bertujuan untuk mengetahuibagaimana perkembangan penyerangan patogen jamur A. solani pada tiga varietas tanaman tomat yangberbeda yaitu Tombatu, Tyrana dan Permata. Penelitian dilakukan dengan menggunakan Rancangan AcakKelompok dengan pengamatan terhadap dua parameter yaitu proporsi penyakit dan laju infeksi penyakit.Hasil penelitian menunjukkan bahwa perkembangan jamur A. solani paling tinggi terjadi pada varietasTombatu yang ditunjukkan dengan proporsi penyakit yang lebih tinggi mencapai 0,8445 dan laju infeksiyang lebih cepat mencapai 0,0810 per unit per hari dibandingkan pada dua varietas yang lain.Kata Kunci: Alternaria solani, tomat, Tombatu, Tyrana, Permata
Role of Nitrogen Fertilizer on Cadmium Uptake by Ramie (Boehmeria nivea (L.) Gaudich) Grown on Cadmium Contaminated Soil Reginawanti Hindersah; Anne Nurbaity; Dedi Nursyamsi
Agrikultura Vol 26, No 1 (2015): April, 2015
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (251.23 KB) | DOI: 10.24198/agrikultura.v26i1.8460

Abstract

ABSTRACTContinues phosphate fertilization as well as organic matter amendment can increase cadmium concentrationin soil and induce more cadmium uptake by plants. Pytoremediation using non edible plant such as ramie(Boehmeria nivea L. Goud) is cheap and effective method to extract Cd from Cd-contaminated soil. Since inplant tissue Cd is bound in phytochelatin peptide which contains nitrogen and sulphur, the objective of thisgreen house experiment was to assess the influence of nitrogen fertilizer in form of urea on cadmiumuptake, nitrogen and sulphur concentration in shoots as well as shoot dry weight of 60-day old ramiegrown in cadmium-contaminated soil. The experiment was set up in a Split Plot Design with two treatmentsand three replications. The main plot was cadmium levels (0, 10 and 15 mg kg-1) and subplot was urea level(0, 5.0 and 7.5 g pot-1). The result showed that the increase of cadmium concentration in soil enhanced itsconcentration in ramie shoot regardless of urea levels. However either cadmium or urea did not changesulphur concentration in ramie shoot. Urea of 7,5 g/pot increased shoot dry weight but adding CdCl2.H2O of15 mg/kg did not change shoot dry weight. This experiment demonstrated that ramie was able to grow inrelatively high level of soil cadmium, and higher cadmium uptake by ramie shoot was not followed by anincrease in nitrogen as well as sulphur uptake.Keywords: Cadmium, Urea, Nitrogen, Sulphur, Ramie.
Hubungan antara Kemiringan dan Posisis Lereng dengan Tekstur Tanah, Permeabilitas dan Erodibilitas Tanah pada Lahan Tegalan di Desa Gunungsari, Kecamatan Cikatomas, Kabupaten Tasikmalaya Henly Yulina; Daud Siliwangi Saribun; Zulkarnaen Adin; Muhammad Hilda Rizki Maulana
Agrikultura Vol 26, No 1 (2015): April, 2015
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (350.249 KB) | DOI: 10.24198/agrikultura.v26i1.8456

Abstract

ABSTRACTRelationship between slope and position of the slopes with soil texture, organic matter, soil permeability anderodibility on dry land in the Gunungsari Village,Cikatomas Sub District, Tasikmalaya DistrictIndonesia has a lot of potential lands especially for agricultural uses. In the areas with steep slopingtopography and high human population, agricultural practices such as seasonal upland crops productionbecomes one of the issues in land damaging in Indonesia. This study aims were to determine the relationshipbetween the land slope and the texture, organic matter, permeability and erodibility of soils at differentslope positions in a land use so that can be used as a source of information and guidance to the communityor the population around the village as well as the institutions involved in land management. The study useda free survey method based on toposekuen. The study techniques used comparative and descriptive methodsto compare samples that collected in the conducted survey then performed explanation and description ofthe conditions in the field that qualitatively observed. The results showed that there was no significantrelationship between the slope and the texture, organic matter, permeability and erodibility of soils invarious slope positions. The 26-40% slopes in the middle and upper slope positions had the highesterodibility value compared to other slope and slope position.Keywords: Slope, slope position, land use, erodibility, organic matterABSTRAKIndonesia memiliki banyak lahan yang sangat potensial khususnya di bidang pertanian. Pada daerah-daerahyang memiliki topografi berlereng curam dan berpenduduk padat, usaha pertanian seperti tanaman semusimtegalan merupakan salah satu sumber kerusakan tanah di Indonesia. Penelitian ini bertujuan untukmengetahui hubungan antara kemiringan lereng dengan tekstur, bahan organik, permeabilitas danerodibilitas tanah pada berbagai posisi lereng di suatu penggunaan lahan sehingga dapat dijadikan sebagaisumber informasi dan arahan bagi masyarakat atau penduduk di sekitar desa serta instansi yang terkaitdalam pengolahan lahannya. Penelitian ini menggunakan metode survei bebas berdasarkan toposekuen.Teknik penelitian menggunakan metode komparatif dan deskriptif yaitu membandingkan sampel-sampelyang diambil berdasarkan metode survei yang dilakukan, kemudian menjelaskan dan menggambarkankondisi di lapangan yang diamati secara kualitatif. Hasil penelitian menunjukkan bahwa tidak terdapathubungan yang kuat antara kemiringan lereng terhadap tekstur tanah pada berbagai posisi lereng,kemiringan lereng terhadap bahan organik tanah pada berbagai posisi lereng, kemiringan lereng terhadappermeabilitas tanah pada berbagai posisi lereng serta antara kemiringan lereng terhadap erodibilitas tanahpada berbagai posisi lereng. Kemiringan lereng 26-40% pada posisi lereng tengah dan atas mempunyai nilaierodibilitas yang tertinggi dibandingkan dengan kemiringan dan posisi lereng lainnya.Kata Kunci: Kemiringan, posisi lereng, penggunaan lahan, erodibilitas, bahan organik
Peningkatan Nutrisi Tanaman Serealia Menggunakan Actinobacteria Endofit Kartika Sari
Agrikultura Vol 26, No 1 (2015): April, 2015
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (572.243 KB) | DOI: 10.24198/agrikultura.v26i1.8461

Abstract

ABSTRACTNutrient Enhancement In Cereal Crops Using Actinobacterial EndophytesWheat high demand without sufficient production and Actinobacterial endophytes usage limitation inIndonesia motivated this research. The aim was to determine Actinobacterial endophytes effect on nutrientenhancement in wheat (Triticum aestivum L.). It was hypothesized that they can enhance wheat nutrient.The experiment stages were: 1) Pot-Trial I, confirming nutrient enhancement using Actinobacteria in 6 soiltypes; 2) Pot-Trial II, screening Actinobacteria strains; and 3) Field-Trial. The results showed thatActinobacteria effects varied for different nutrients and site based differences. In Pot-Trial I, different soiltypes significantly affected the manganese and zinc content (P=0.00 and P=0.01), but not inoculation ofActinobacteria nor the combination of them. Field Trials showed the same trends. Combination betweenthose treatments significantly affected manganese content (P=0.045). Nutrient analysis on xylem sap in PotTrials 2 only showed the value differences since there was insufficient collected volume to be statisticallyanalyzed. Zinc and iron contents were the highest in Actinobacteria EUM165 treatment and the highestmanganese content in Actinobacteria EN16. In conclusion, wheat nutrient content is affected byActinobacteria and different soil types but there was insufficient evidence to generally conclude that it canbe enhanced. They have their own effects and affected each other in enhancing nutrient content.Keywords: Nutreint, wheat, endophytic ActinobacteriaABSTRAKTingginya permintaan gandum tidak disertai produksi yang cukup, serta terbatasnya pemanfaatanActinobacteria endofit di Indonesia, melatarbelakangi penelitian ini. Tujuannya untuk mengetahuipengaruh penambahan Actinobacteria endofit terhadap nutrisi gandum (Triticum aestivum L.). Diduga,penambahan Actinobacteria endofit dapat meningkatkan kandungan nutrisinya. Tahapan penelitianmeliputi: 1) Uji-Pot I, mengonfirmasi peningkatan nutrisi gandum menggunakan Actinobacteria pada 6 jenistanah; 2) Uji-Pot II, menguji berbagai strain Actinobacteria terhadap peningkatan nutrisi gandum; serta 3)Uji Lapangan. Hasilnya menunjukkan bahwa Actinobacteria meningkatkan nutrisi gandum secara berbedatergantung nutrisi yang diuji serta jenis tanah yang digunakan. Pada Uji-Pot I, jenis tanah berpengaruhnyata terhadap kandungan mangan dan seng (P=0.00 dan P=0.01), tapi pemberian Actinobacteria maupunkombinasi keduanya tidak. Uji Lapangan menunjukkan hasil yang sama. Kombinasi kedua perlakuanmeningkatkan kandungan mangan secara signifikan (P=0.045). Analisis cairan xilem dari Uji-Pot IImenunjukkan perbedaan hasil tanpa uji statistik karena terbatasnya cairan yang dikumpulkan. Kandungantertinggi seng dan zat besi ditunjukkan oleh perlakuan Actinobacteria EUM165 dan mangan yang lebihtinggi oleh Actinobacteria EN16. Disimpulkan bahwa kandungan nutrisi tanaman gandum dapatdipengaruhi oleh pemberian Actinobacteria endofit serta perbedaan jenis tanah, namun tidak cukup buktiuntuk menyimpulkannya secara umum. Baik jenis tanah maupun Actinobacteria endofit memiliki pengaruhsendiri serta saling mempengaruhi terhadap kandungan nutrisi tanaman gandum.Kata kunci: Nutrisi, gandum, actinobacteria endofit
Seleksi Ketahanan Ubi Jalar Madu Genotipe F1 terhadap Penyakit Kudis (Sphaceloma batatas Saw.) Fitri Widiantini; Endah Yulia; Aina Anna Roosda; Agung Karuniawan
Agrikultura Vol 26, No 1 (2015): April, 2015
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (675.215 KB) | DOI: 10.24198/agrikultura.v26i1.8457

Abstract

ABSTRACTResistant Selection of Sweet Potato Genotypes F1 against Scab Disease (Sphaceloma batatas)Variety of sweet potato in Indonesia is very diversed which is an advantage to develop sweet potatovarieties. However, local sweet potato often replaced with higher economic value varieties. The aim of thisresearch was to determine the resistant ability of genotype F1 from open pollination of local sweet potatolandraces against scab disease (Sphaceloma batatas ). As much as 661 genotypes F1 were grown on researchplantation centre at Ciparanje, Faculty of Agriculture Universitas Padjadjaran. The experiment was doneusing randomized blocked augmented design. The result demonstrated that genotypes F1 as results ofcrossing over between local varieties of sweet potatoes had high resistance against scab. This wasdemonstrated by more than 50% of the assessed population were resistant to scab as showed by low value ofdiseases severity. However, growing those genotypes at different seasons and locations need to be done todetermine the resistance stability.Keywords: sweet potato, scab, Sphaceloma batatasABSTRAKVarietas lokal ubi jalar di Indonesia sangat beragam. Keragaman yang ada tersebut sangat bermanfaat dalampengembangan ubi jalar. Namun, varietas lokal semakin tergeser seiring dengan nilai ekonomi yang lebihmenguntungkan. Tujuan dari penelitian ini adalah untuk mngetahui ketahanan genotipe-genotipe F1 ubijalar madu hasil dari open pollination dari aksesi-aksesi ubi jalar lokal terhadap penyakit kudis (Sphacelomabatatas). Sebanyak 661 genotpe F1 beserta aksesinya digunakan dalam penelitian ini. Percobaan dilaksanakandi kebun percobaan Ciparanje Fakultas Pertanian Universitas Padjadjaran pada bulan Januari 2013-Juni2013. Percobaan disusun dengan menggunakan rancanga acak dengan perluasan (augmented design).Pengamatan dilakukan dengan menghitung intesitas serangan penyakit kudis dengan interval 30 hari. Hasilpercobaan menunjukkan bahwa genotipe-genotipe F1 yang diuji menunjukkan potensi ketahanan terhadapserangan penyakit kudis. Hal ini ditunjukkan dengan banyaknya genotipe ubi jalar yang relatif tahanterhadap serangan penyakit kudis. Lebih dari 50% dari genotipe F1 ubi jalar yang diuji tahan terhadapserangan penyakit kudis yang ditunjukkan dengan rendahnya nilai assessment serangan penyakit. Pengujiandi berbagai musim tanam dan lokasi perlu dilakukan untuk mengetahui kestabilan ketahanan yang dimilikoleh genotipe-genotipe F1 tersebut.Kata kunci: ubi jalar madu, kudis, Sphaceloma batatas

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