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Merakati Handajaningsih
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Dept of Crop Production Faculty of Agriculture, University of Bengkulu WR Supratman St. Kandang Limun, Bengkulu 38371
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Akta Agrosia
Published by Universitas Bengkulu
ISSN : 14103354     EISSN : 26157136     DOI : https://doi.org/10.31186/aa
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Akta Agrosia is dedicated to researchers or academics who intent on publishing research, scientific thinking, or other scientific ideas. The articles published in the Akta Agrosia are the author’s original works covering on Crop Production, Crop Physiology, Pest and Disease, Soil Science, Agronomy, Plant Genetics, Plant Breeding, Plant Biotechnology. Akta Agrosia is published by the Department of Crop Production, Faculty of Agriculture, University of Bengkulu, biennially in June and December. ISSN:1410-3354 (printed media) and eISSN: 2615-7136 (online media).
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Agronomi dan Ilmu Tanaman
Articles 8 Documents
 1 
Search results for , issue "Vol 23 No 2 (2020)" : 8 Documents clear
Rice Leaf Folder (Cnaphalocrosis medinalis) Infestation at Different Planting System and Varieties Saleh, Teddy Wahyana; Nur, Amin; Saragih, Ammini A.
Akta Agrosia Vol 23 No 2 (2020)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

The proliferation of pests is most influenced by the host (plants) and other environments including plant distance and humidity. Agriculture research and development departement has been released many varieties of rice but their resistance to pests and diseases on various developmental areas is different. The study aims to determine the population and attacks intensity of Rice Leaf Folder (Cnaphalocrosis medinalis) on farming rice  jajar legowo ganda and regular systems (tegel). The research has been carried out on farmers  fields in Buntulia Village, Duhiadaa District, Pohuwato Regency from June to October 2019. The study  used  a Split plot research design with four replications. The main plot is farming rice jajar legowo ganda  and  regular system. Sub plots are varieties: 1). Inpari 30, 2). Inpari 31, 3). Inpari 42, and 4). Situbagendit. Cnaphalocrosis Medinalis  was observed when the plants age 5, 7, 9, and 11 week after planting (WAP) on 30 clumps per plot. The results showed Cnaphalocrosis medinalis  attacking on all varieties in both systems. However, Cnaphalocrosis medinalis attacks on the farming rice jajar legowo ganda (average 7.96 %) has as lower as than regular system (av. 3.95 %)) on the observations per weeks. The intensity of Cnaphalocrosis medinalis attacks on Inpari 31 (av. 5.56 %)   as lower as than Situbagendit  (av. 13.43 %). The result showed highest populations Cnaphalocrosis medinalis was found on regular system (av. 9.35 h / c) lowest Cnaphalocrosis medinalis populations was on the rice farming jajar legowo ganda (av. 7.96 h / c).  Highest populations of  Cnaphalocrosis medinalis was found on Situbagendit variety and Inpari 30 variety has lowest populations. Cnaphalocrosis medinalis attack intensity, generally increasing with rice age, the population density was relatively decreased because control doing.Keywords: rice leaf folder, planting system, varieties. 
The Effectiveness of Phosphate Solubilizing Rhizobacteria on The Growth and Yield of Several Soybean Varieties on Ultisol Soils Diyanti, Afri R.; Utama, M Z.H.; Ernita, Milda
Akta Agrosia Vol 23 No 2 (2020)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

ABSTRACH  This study aims to obtain  the interaction of rhizobacteria and soybean varieties, types of rizobacteria that  effectively  dissolve phosphate, varieties that  are able to grow well on ultisol soils. The research is rizobacterial isolation and rizobacteria selection. Observations made were bacterial isolation, identification of morphological and physiological rhizobacteria (gram  reactions, hypersensitive reactions, as phosphate solvents and germination test and rhizobacteria test of phosphate solvents by inplanta. The results showed that  rizobacteria isolates from ultisol soil of chilli plants, eggplant plants and rice roots obtained 32 isolates. The highest number of isolates were obtained from the ultisol soil of chilli plants namely  18 isolates. The color of the rizobacteria isolate colony was obtained by 27 cream isolates and 5 yellow isolates. The surface of the colony in the chilli ultisol soil consisted of 3 groups namely  arising, flat and convex, the surface of the colony arising obtained 8 isolates, the flat surface obtained 9 isolates and the convex  surface obtained 1 isolate. All isolates were gram negative. From 32 rizobacteria isolates, there  were 2 isolates which were able to dissolve phosphate, namely  RT1 and RC3. In green  bean  plants with RT1 administration, the seeds weight was 2.76 grams high compared to control  and RC3. Key words: Rhizobacteria solvent phosphate RT1, RC3, ultisol, mung  bean
Seed-Borne Fungi Associated with Foxtail Millet (Setaria italica L. Beauv.) Genotype ICERI-6 Khairani, Hagia Sophia; Ardie, Sintho W.
Akta Agrosia Vol 23 No 2 (2020)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

The need of functional foods that provide health benefits beyond the essential nutrient has caused foxtail millet (Setaria italica L. Beauv.) potential to be developed. The foxtail millet superior development needs to be equipped by the production of pathogen-free seeds. Seed-borne pathogens have the potential to inhibit plant growth, reduce plant productivity, change the nutritional content of plants, and may cause new plant disease epidemics. This study aimed to detect and identify fungi associated with foxtail millet seeds genotype ICERI-6 from the Indonesian Cereal Research Institute, Maros which have 8 mo shelf life. Seeds surface-sterilized with NaOCl was grown on potato dextrose agar (PDA) and incubated for 4 days. Detected fungal colonies were recultured on PDA medium to be characterized by morphological characteristics. The colonies were dominated by Fusarium oxysporum (52%) followed by F. verticilloides, Curvularia sp., Helminthosporium sp., Cladosporioum sp., and Rhizoctonia solani ranging from 4% to 13%. The fungal growth rate varies from 0.73 - 2.67 cm per day. Hot water treatment with temperature 52 oC for 20 min could reduce the percentage of infection by up to 64% without the reduction of seed germination. Detection of pathogens at different shelf lives and genotypes is needed as basic information to optimizing the method of controlling seed-borne pathogen in foxtail millet seeds.  Keywords: growth rate, hot water treatment, incubation, morphological characterization, shelf life.
Relationships Between Nutrient Of Land And Cow’s Blood Added With Bioactivators On Performance of Soybean (Glycine max (L.) Merr.) Podesta, Fiana; Harini, Ririn; Fitriani, Dwi; Suryadi, Suryadi
Akta Agrosia Vol 23 No 2 (2020)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

Soybean production in Bengkulu Province is still lower than national production. Soybean production can still be improved by adding nutrients, one source of untapped nutrients is cow's blood which is still a waste. The purpose of this research is to determine the effect of cow’s blood added with bioactivators on growth performance of soybean. This research was conducted by using a complete randomized design (CRD) arranged factorially consisted of two factors with three replications. The first factor was the various kinds of cow’s blood added with bioactivators consisting of Yeast, Stale Rice, Microorganism-Bio(M-Bio), Effective Microorganism-4 (EM-4), and Rumen. The second factor was the concentration of cow’s blood added with bioactivators consisting of 15%, 30%, and 45%. Results showed: 1) There was no treatments interaction between various kinds of cow’s blood added with bioactivators and its concentration in the growth, 2) the various kinds of cow’s blood added with  bioactivators had significant effect in the growth of plant height, number of leaves, number of branches, wet and dry weight, but it had no significant effect on plant height and leaf area, and 3) The concentration of cow’s blood added with bioactivators  has no significant effect in the growth.  This study indicated that cow’s blood added with Rumen as bioactivator showed better growth performance of soybean. Keywords: bioactivators, cow’s blood, nutrient of land, performance of soybean
Inventory And Potential Of Yellow Rice Stem Borer (Scirpophaga incertulas Walker) Parasitoid In Rice Plantation (Oryza sativa L) In Three Villages, Lima Puluh Regency, Batubara District, Northern Sumatra Siagian, Sulastri; Siregar, Ameilia Zuliyanti; Tobing, Maryani C.
Akta Agrosia Vol 23 No 2 (2020)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Yellow rice stem borer (YRSB), Scirpophaga incertulas Walker, often causes decreased of rice production. One of the pest controlling of YRSB used based on the concept of IPC (integrated Pest Control) was biological control using egg parasitoids. The purpose of this research was to find out the inventory and potential of parasitoids of eggs in yellow rice stem borer (S. incertulas) on rice cultivation at 3 locations (Kuala Gunung Village, Cahaya Pardomuan Village, and Air Hitam Village) in Lima Puluh Sub-District, Batubara Regency, Northern Sumatra. The study used a survey method by taking samples of groups of eggs by purposive sampling on rice cultivation. Egg clusters are kept for several days until the parasitoids appear. Parasitoid that appeared was preserved in a bottle containing 70% alcohol, then identification was carried out at the Pest Laboratory of Departmemt of Agrotechnology, Faculty of Agriculture, University of Sumatera Utara. This research was conducted from March to September 2019. The results obtained by 3 Parasitoid families were identified, such as Eulophidae, Scelionidae, and Trichogrammatidae. Parasitoid level and parasitoid dominance index were higher in the non-insecticide treatment compared to the insecticide treatment. The highest parasitic rate (41.78%) of the Eulophidae family and the lowest (0.00%) of the Trichogrammatidae family. The highest parasitoid dominance index (0.67) was found in the Eulophidae family and lowest (0) in the Trichogrammatidae family. The distribution pattern of the Eulophidae family was grouped, the Trichogrammatidae family was regular while the Scelionidae family was different for each village. Our prediction, the research will be useful for future.Keywords: Rice, Scirpophaga incertulas, parasitoid, parasitation Level, dominance, distribution pattern.
Growth and Yield of Lettuce (Lactuca sativa L.) by Giving Cow Manure and Empty Palm Oil Bunch Fertilizer on Peat Soil Manullang, Yedija; Herawati, Reny; Handajaningsih, Merakati; Ganefianti, Dwi Wahyuni; Haquarsum, Eka J.V.; Sutrawati, Mimi
Akta Agrosia Vol 23 No 2 (2020)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Lettuce (Lactuca sativa L.) is a horticultural plant that is beneficial for health. Efforts are being made to expand the plant area. One of them is by utilizing marginal land such as peatlands.  Peatlands in Indonesia are the most extensive soils in various tropical countries in the world that have low soil fertility and high acidity so that they are not optimal for lettuce growth. The provision of organic material can increase soil fertility by improving physical, chemical, and biological soil properties so that it can support lettuce growth. This study aims to determine the dose of cow manure and the dosage of oil palm empty fruit bunch fertilizer and the optimal dose interaction for growth and yield of lettuce. This research was conducted from June 2019 to August 2019 in Bengkulu City. This study uses a Completely Randomized Design consisting of two factors, which are repeated three times. The first factor is the dose of cow manure with three levels, namely: 0 tons ha-1, 15 tons ha-1, and 30 tons ha-1. The second factor is the dose of oil palm empty fruit bunch fertilizer, which consists of four levels, namely 0 tons ha-1, 5 tons ha-1, 10 tons ha-1, and 15 tons ha-1. The results showed that the dosage of cow manure 15 tons ha-1 and without the application of empty fruit bunches fertilizer gave the best results in leaf length of 18.674 cm. The best dose of cow manure for growth and yield of lettuce is 15 ha-1. The application of OPEFB fertilizer has not been shown to affect the growth and yield of lettuce.
Liquid Tobacco Smoke Concentration Test Against the Intensity of Stem Borer (Chilo saccharipagus) Attack on Sugar Cane Roeswitawati, Dyah; Nidya, Nindy; Indratmi, Dian; Prabowo, Heri
Akta Agrosia Vol 23 No 2 (2020)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Tolerance of 20 heirloom rice varieties at seedling stage salinity stressed and their growth in lowland coastal area Rustikawati, Rustikawati; Herison, Catur; Chozin, Muhammad; Indres, Indres
Akta Agrosia Vol 23 No 2 (2020)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Coastal area of Bengkulu Province is home of many heirloom rice varieties and play an important role in contributing rice production in the province. However, as the climate change proceeds, a progressive sea water inundation has increased soil salinity mainly in low-lying areas and jeopardizing the sustainability of rice production in coastal regions.  The use of salt-tolerant varieties, therefore, would be a sensible solution to alleviate the adverse effect of soil salinity in respect of maintaining the crop production in the coastal areas. The objective of this study was to examine the salinity tolerance of 20 heirloom rice varieties collected from a coastal area of Bengkulu Province.  Prior to the screening process, lethal concentration 90 (LC90) was determined by assaying the seedlings of ‘Kuning Tinggi’ in a series of nutrient solution containing a different concentration of NaCl (0, 2000, 4000, 6000, 8000 and 10000 ppm). Using a regression analysis, LC90 was detected at a concentration of 3910 ppm. The screening was performed by exposing the varieties in the nutrient solution culture containing 4000 ppm NaCl and growing them on the tidal swamp. Under nutrient culture evaluation, the symptom of NaCl toxicity was scored and converted to salinity tolerance index. ‘Humbur’, ‘Kuning Tinggi’ and ‘Padang Bakung’ exhibited medium tolerant, while ‘Beram’, ‘Imperata’ and ‘Kuning’ exhibited very sensitive. Further evaluation of the tidal swamp for vegetative and generative performances signified that ‘Humbur’ and ‘Kuning Tinggi’ had medium tolerant to salinity stress

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