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Kota kendari,
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INDONESIA
Jurnal Agroteknos
Published by Universitas Halu Oleo
ISSN : 20877706     EISSN : 25274074     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Arjuna Subject : -
Articles 8 Documents
 1 
Search results for , issue "Vol 1, No 3 (2011)" : 8 Documents clear
SERANGGA FITOFAG YANG BERASSOSIASI PADA PERTANAMAN TEBU DI KABUPATEN BONE, SULAWESI SELATAN Tamrin Abdullah; Suleha Thamrin; Muhammad Sabir
Jurnal Agroteknos Vol 1, No 3 (2011)
Publisher : Fakultas Pertanian Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56189/ja.v1i3.2244

Abstract

ABSTRACT The  research was  conducted at  the  Sugar Mill  Plantation PTPN Camming, District Libureng, Bone, and continued at the Laboratory of Plant Pests and Diseases. The purpose of this study was to determine the fitofag insects associated with sugarcane (S. officinarum L.) plants at several age levels. Research method was made using several kinds of traps namely Pitfall traps, nets, traps and direct observation of yellow adhesive. Observations were made as many as 8 times, with an interval of 3 days. The research results showed that fitofag insects that were found in sugar cane plantation were dominated by Bactrocera spp (Tepritidae; Diptera), and  the  lowest insect was Family Pyralidae (Lepidoptera). Insects which were categorized as pest in sugarcane crop were Locusta sp. (Orthoptera), Wereng (Cicadellidae; Homoptera), C. lanigera (Pseudococcidae; Homoptera), Pyralidae (Lepidoptera), Gryllidae (Orthoptera), and Curculionidae (Coleoptera). Keywords: Sacharum officinarum L., phytofag insects, diversity of population
PENGARUH KEMASAMAN DAN KONSENTRASI ALUMINIUM TERHADAP PERTUMBUHAN BEBERAPA VARIETAS TANAMAN JAGUNG (Zea mays L) Dirvamena Boer; Muhidin Muhidin; La Ode Safuan
Jurnal Agroteknos Vol 1, No 3 (2011)
Publisher : Fakultas Pertanian Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56189/ja.v1i3.2250

Abstract

This research was conducted in a factorial pattern of split plot design, with three factors.  The first factor (as main plot) was acidity (pH), with two treatment levels: pH 4.5 (P1) and pH 6.5 (P2); the second factor (as sub plot) was aluminium concentration, with four treatment levels: 0 ppm Al (A1), 50 ppm Al (A2), 100 ppm Al (A3), and 150 ppm Al (A4); and the third factor (as sub-sub plot) was variety, with eight treatment levels: SU-025 (V1), ST-028 (V2), ST-050 (V3), ST-070 (V4), ST-079 (V5), SE-081 (V6), SE-090 (V7), and SU-094 (V8). Each treatment was repeated twice, resulting in 128 experimental units. The objectives of the research were: (1) to study the effect of acidity, aluminium concentration and their interactions on the growth of several maize varieties, (2) to obtain maize varieties which were tolerant to acidity and high aluminium concentration. Research results showed that acidity influenced leaf area and size.  Aluminium influenced stem diameter, leaf area, total leaf weight, plant height, and  dry weight of  top  plant parts (stem  and  leaves).    Variety influenced   all   growth   characters,   except   leaf   size.   Interaction   between   acidity   and aluminium concentration influenced seminal root length.   Interaction between acidity, aluminium and variety influenced lateral root length, whereas interaction between acidity and variety had no influenced on all plant growth characters.  Concentration of 50 ppm Al gave a better effect compared to the concentration of 150 ppm Al.   The growth of maize variety ST-028 (V2) and SU-025 (V1) gave a better yield, compared to other varieties. Keywords: acidity, aluminium, maize, in vitro
PERKEMBANGAN TANAH DARI LAPUKAN BATUAN ULTRABASA PADA DUA TOPOSEKUEN DI SULAWESI TENGGARA Bambang Hendro Sunarminto; Syamsul Arifin Siradz
Jurnal Agroteknos Vol 1, No 3 (2011)
Publisher : Fakultas Pertanian Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56189/ja.v1i3.2245

Abstract

The study of soil development of weathering ultramafic rocks have been performed on several toposequence in Sulawesi Tenggara in Puriala Subdistrict of Konawe District and in Lasusua Subdistrict of Kolaka District from December 2010 until Juni 2011. The results showed that soils developed from ultramafic rocks weathering low rainfall (torric) in Puriala have a more coarse texture (LS, SL, L, SiL, CL, C), impervious container which was more shallow (20-90 cm), land of color tend to be brown (7.5 YR), pH 6.8 to 7.6, C-organic 0.57 to 0.93%, CEC 26.20 to 69.61 cmol(+)kg-1, the number of base 11.90 to 15.86 cmol(+)kg1, Fe-d 3.79 to 16.12%, Al-d 0.14 to 1.65%, smectite clay minerals, sand mineral feldspar hematite compared soils developed from ultramafic rocks weathering high rainfall (udic) in Lasusua color tends to be more red (2.5 YR), with a finer texture (SiCL, C) and impervious container deeper (70 -> 150 cm), pH 6.1 to 7.0, C-organic 1.20 to 1.86%, CEC 11.29 to 31.60 cmol(+)kg-1, the number of bases 2.72 to 13.33 cmol(+)kg-1, Fe-d 21.62 to 27.04%, Al-d 0.87 to 3.58%, gutit smectite clay minerals, sand mineral feldspar-magnetite-hematite. Soil weathering from ultramafic rocks with high rainfall experienced base cations leaching was higher mainly characterized by high mobility of cations with CEC and a lower base amount, and the accumulation of low mobility of cations is characterized by high Fe-d and Al-d. Level of soil development began from P2 (Entisol), P1 (Vertisol), L2 (Inceptisol), P3 (Inceptisol), L1 (Alfisol) and the last L3 (Oxisol) the most advanced of soil is on the middle slope, the next is soil on summit, and the last is soil on toeslopes
ISOLASI, KARAKTERISASI DAN UJI ANTAGONIS BAKTERI SELULOLITIK TERHADAP Phytophthora capsici ASAL TANAMAN LADA (Piper nigrum L.) SECARA IN-VITRO Andi Khaeruni; Vit Nehru Satrah; Mariadi Mariadi
Jurnal Agroteknos Vol 1, No 3 (2011)
Publisher : Fakultas Pertanian Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56189/ja.v1i3.2251

Abstract

ABSTRACT The Aim of this experiment was obtain cellulolitic bacteria that has antagonistic potential toward P. capsici of   pepper isolated under in-vitro test.   The experiment was begun in isolation and selection of cellulolitic bacteria from soil samples were taken from some location at Southeast Sulawesi. Selected 20 isolates of cellulolitic bacteria examined for its    morphological and physiological characteristics as  well as antagonistic potential toward   P. capsici of pepper isolated under in-vitro test on Potato Dextrose Agar (PDA) medium. The potential antagonistic test was carry out used randomized complete design with three replications to observes the ability of cellulolitic bacteria inhibited mycelium growth of P. capsici on PDA medium. Results showed the selected isolates very divers on morphological characters in  size, pigmentation, shape,  and  elevation of  surface. Physiological character showed  that  out  of  20  isolates,  12  isolates  have  negative  Gram reaction  and  8  isolates    positive  Gram  reaction.  Obtaining  5  isolates  very  strongly,  11 isolates strongly and 4 isolates weak activities on secreted extracellular cellulose enzyme, all of isolates were facultative anaerobe activity.  Further test on antagonistic ability showed that STS15c and STS12c2 isolates are the best isolates to inhibited mycelium growth of P. capsici on PDA medium in potential inhibited were 53.16% and 52.02% respectively. Key words: Cellulolitic bacteria, Phytophthora capsici, antagonistic
KLASIFIKASI KESESUAIAN LAHAN KAKAO MENGGUNAKAN FAKTOR PEMBATAS MAKSIMUM DI KABUPATEN KOLAKA Hasbullah Syaf; Mahfud Arifin; Abraham Suriadikusumah; Rachmat Harryanto
Jurnal Agroteknos Vol 1, No 3 (2011)
Publisher : Fakultas Pertanian Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56189/ja.v1i3.2247

Abstract

ABSTRACT The current implementation of land suitability classification of Cocoa is based on the national standard of growing plant. Therefore the implementation of the land use at the specific location was not acceptable. It is important to evaluate the land suitability  of  the  cocoa  growing  areas.  This  study  was  conducted  at  Kolaka  Regency Southeast Sulawesi Province. This research was performed using a survey method based on the observation unit. Which is consist of 93 observation units.   The climate, soil and environment observations were following the Soil and Agroclimate Research Centre ( PPTA, 1993); Department of Agriculture (DEPTAN, 1993 dan 2003) and the Indonesian Coffee and Cocoa  Research  Centre  (PPKKI,  2008).  The  analysis  of  land  suitability  is  base  on  the threshold factor using the mínimum. The results showed that the land suitability of the cocoa growing areas according to  PPTA dan DEPTAN (1993) were classification full into 76.34% marginal suitable (S3), 12.90% currently not suitable (N1) and 10,75% was permanently not suitable (N2). On the other had based on the DEPTAN (2003) the cocoa growing areas were 83.87% S3 and 16.13% not suitable (N). While according to the PPKKI  (2008) the S3 was 63.44% and the N was 36.56%. Key word: land suitability classification and cocoa
PENGARUH PERUBAHAN PENGGUNAAN LAHAN TERHADAP KONDISI HIDROLOGI DAS KONAWEHA HULU PROVINSI SULAWESI TENGGARA La Baco; Naik Sinukaban; Yanuar J Purwanto; Bunasor Sanim; Suria Darma Tarigan
Jurnal Agroteknos Vol 1, No 3 (2011)
Publisher : Fakultas Pertanian Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56189/ja.v1i3.2252

Abstract

ABSTRACT Phenomena of depleting of water resources and increasing water demand have been occurring in Konaweha watershed. Combine with other conditions, Konaweha watershed have been categorized as priority watershed in Southeast Sulawesi Province. Land use change is  presumed to  influence hydrology conditions such as  the  increasing maximum discharge in rainy season, decreasing minimum discharge in dry season and also runoff coefficient increased in rainy season. The objective of this research was to evaluate the effects of land use changes on hydrology conditions such as maximum discharge, minimum discharge and runoff cpeficient. This research was conducted at Konaweha watershed for 10 months from June 2009 to March 2010.   The result of this research showed that forest, swamp,  plantation  and  bush  area  tended  to  decline  exponentially year  by  year  due  to population growth. During 1991 to 2010 forest decresed from 66,6 % in 1991 to 48,3 % in 2010. At the same time, plantation, mix garden and bush increased 26,0 % to 39,7 %, 3,0 % to 5,0 %, and 1,7 % to 3,1 % from the total of the watershed area.   The decline of forest area have significantly decreased minimum discharge of Konaweha River in dry season from 40 m3/second in 1991 to 24 m3/second in 2010. At the same time, maximum discharge increased from 246 m3/second to 284 m3/second, and runoff coefficient increased from 31,4% to 48,3 %. Key words: watershed, land use change, discharge, runoff coeficient 
PERKEMBANGAN DAN HAMBATAN MAKAN LARVA Crocidolomia pavonana YANG DIBERI SEDIAAN FRAKSI DIKLORMETAN KULIT BATANG Calophyllum soulattri Edy Syahputra; Djoko Prijono
Jurnal Agroteknos Vol 1, No 3 (2011)
Publisher : Fakultas Pertanian Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56189/ja.v1i3.2248

Abstract

ABSTRACKThe objectives of this study were to evaluate the develovment time, and feeding inhibity of Crocidolomia pavonana larvae fed dichloromethana fraction of Calophyllum soulattri bark preparation.   Fractionation of C. soulattri fraction was performed with vaccuum liquid chromatography.   Bioassay was conducted against C. pavonana larvae by leaf-feeding method.  Second-instar C.  pavonana larvae  were  fed  extract-treated broccoli leaves for 48 haurs, then were presented with untreated leaves until the surviving larvae reached the fourth-instar stage.   The number of dead larvae was recorded.   For  feeding inhibity, preparation was assayed using leaf-disc choice and no-choice test towards third- instar C. pavonana larvae. The results showed that dichloromethan fraction of C. soulattri barks possessed strong insecticidal activity against C. pavonana larvae with LC50  of 0,06%. The dichloromethan fraction at 0,06%-0,09% could prolong development time of instar II-III larvae  by  1,7-2,7  days.  In  choice  and  no-choice  leaf  disc  methods,  the  dichloromethan fraction at 0,02%-0,075% inhibited feeding of instar III larvae by 54,8%-100%.  Concerning with their potentiality, further studies are needed to identify insecticidal compounds in those active extracts.Keywords: Calophyllum soulattri, Crocidolomia pavonana, feeding inhibity, insecticidal activity
PERBANYAKAN BIBIT JERUK SECARA IN-VITRO DAN BEBAS PENYAKIT CVPD Teguh Wijayanto; Muhammad Taufik; Dirvamena Boer; Ni Wayan Sri Suliartini
Jurnal Agroteknos Vol 1, No 3 (2011)
Publisher : Fakultas Pertanian Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56189/ja.v1i3.2249

Abstract

Abstract Citrus Vein  Phloem Degeneration (CVPD) is  one  of  the  most important diseases of citrus. Worldwide and national yield losses of citrus production due to this disease infection have been very significant.   This research ultimately aimed at producing citrus stocks through in-vitro culture, and free of CVPD.  Citrus seeds were used as explant and cultured on MS and WPM in-vitro media, supplemented with malt extract. Citrus plantlets were tested for the presence of  CVPD DNA using CVPD specific primers in PCR reactions.   Research results showed that MS basal medium supplemented with malt extract was quite good for in- vitro production of citrus plantlets. Plantlets were negative for CVPD infection based on PCR tests.  CVPD-free seedlings (Citrus reticulata) have been grafted with citrus rootstock (Citrus sinensis).  Grafted citrus seedlings were also proven to be negative for CVPD infection based on similar PCR tests.  Citrus seedlings/stocks produced by in-vitro culture, and free of CVPD, are now available for further growth. Keywords: Citrus Vein Phloem Degeneration (CVPD), in-vitro culture, PCR

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