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Merakati Handajaningsih
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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 5 Documents
 1 
Search results for , issue "Vol 24 No 2 (2021)" : 5 Documents clear
Host Diversity of Beauveria bassiana (Balsamo) Vuillemin in Rice Field in Bolaang Mongondow Regency Siahaan, Parluhutan; Saroyo, Saroyo; Langoy, Marnix L.D.; Saimima, Arie J.
Akta Agrosia Vol 24 No 2 (2021)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

Beauveria bassiana can attack a variety of hosts and their virulence can vary at each host and location. Exploration of the diversity of hosts B. bassiana from local isolates needs to be done as initial information that can explain the ability of B. bassiana in infecting insects. Sampling locations were selected in three district, each district selected three stations and each station consisted of 10 plots. The location of sampling is determined by the purposive random sampling method. Each station was made a plot measuring 1m x 1m and distributed randomly. Every insect infected with B. bassiana was taken and taken to a laboratory for identification. The results showed that there were five insects that hosted B. bassiana, namely Nilaparvata lugens, Scotinophara coarctata, Leptocorisa oratorius, Nezara viridula and Paraeucosmetus pallicornis. The highest host diversity index was found in North Dumoga with a value of 1.47. The highest abundance index was found in N. lugens host in East Dumoga with a value of 43%. The highest density was found in the host N. lugens in Central Dumoga with a value of 1.93 ind / m2. There were indications of differences in virulence of the  B. bassiana local isolates that were influenced by the spesies of host and location Keywords: Beauveria bassiana, diversity,  Bolaang Mogondow Regency, diversity and abundance indices
Biodiversity And Arthropod Abundance In Organic Semi Rice In Swamp Lowland in Palangka Raya City Manaf, Melhanah; Mulyani, Rahmawati Budi; Satrio, Mario
Akta Agrosia Vol 24 No 2 (2021)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

Palangka Raya has the potential for swamp lowland to be used for rice farming. For this purpose, knowledge of arthropod biodiversity is required. The study aims to determine the biodiversity and abundance of arthropods and arthropods dominant in semi-organic rice plantations in swamp lowlands. The study was conducted from September to November 2019 in Palangka Raya City. The study was carried out on 1.148m2 farmer's paddy fields. The land is divided into three trial plots, each measuring 28x13 m2. Observations were made at the age of 8-15 WAP. Samples were taken using a net trap (Sweep net). Arthropod biodiversity was analyzed using the Shannon-Weaver diversity index (H'). The results showed that in the semi-organic rice ecosystem were obtained 10 orders, 58 families with a total of 8973 individuals, consisting of pests 92.61%, predators 6.59%, parasitoids 0.28%, pollinators 0.06%, Detrivore 0.35%, and 0.07% neutral insects. Diversity index (H') is low to moderate (0.10-2.19), dominance index (C) is in the low to high (0.18-0.97); Evenness index shows that the community is depressed until unstable (0.04-0.67); and The abundance index on the criteria of less to very much (8.96-25.03). The dominant arthropods are dominated by the Rice bug (Leptocorisa acuta).
Effectiveness of Indigenous Rhizobacteria Formulations in Increasing the Growth and Yield of Shallots (Allium ascalonicum L.) Sutariati, Gusti Ayu Kade; Madiki, Abdul; Hariani, Ni Kadek Dwi; Mudi, La; Khaeruni, Andi; Wibawa, Gusti Ngurah Adi; Afa, Musadia
Akta Agrosia Vol 24 No 2 (2021)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

The use of beneficial microbes in increasing plant growth and yield is a very appropriate choice to reduce synthetic chemicals that can cause negative impacts on the environment. The purpose of this study was to evaluate the effectiveness of post-save formulations of Wakatobi indigenous rhizobacteria in increasing the growth and yield of shallots. The study was conducted in Jati Bali Village, Konawe Selatan District, using a Randomized Block Design, consisting of 10 rhizobacterial formulation treatments, a combination of three types of biological agents, namely Pseudomonas sp. LP03, Pseudomonas sp. TWB02 and Pseudomonas sp. TWB11, and three types of formulation materials: ground brick powder, ground burned rice husk powder, and bentonite; one control using NaCl 0.85%. The experiment was repeated three times so that there were 360 treatment units. The results showed that of the three types of rhizobacteria tested, only Pseudomonas sp. TWB02 and Pseudomonas sp. LP03 can display better performance in increasing the growth and yield of shallots. These rhizobacteria are more compatible using the ground burned rice-husk powder formulation. Increased shallot yield (tuber fresh weight) in seed treatment using Pseudomonas sp. TWB02 and Pseudomonas sp. LP03 in the formulation of ground burned rice-husk powder reached 121% and 117% compared to controls. Further research needs to be done on a broader scale and different environmental conditions to see the stability of these biological agents' effects on the growth and yield of shallots.
Characteristics of fungi contaminant in tissue culture of Bromheadia finlaysoniana (Lind.) Miq Andriani, Desta Desta; Heriansyah, Pebra
Akta Agrosia Vol 24 No 2 (2021)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

Generative propagation of orchid plants has problems because orchid seeds do not have endosperm that need to be multiplied using tissue culture. Contamination is a limiting factor in the multiplication of plants in tissue culture. This study describes the types of contaminants found in Bromheadia finlaysoniana callus. This research was carried out in two stages. The first stage is carried out culture of various explants of Bromheadia finlaysoniana using murashige and Skoog media with enrichment of hormone Benzylaminopurine 1 mg/l; (Naphthalene acetic acid) 0.5 mg/l; 100 mg mynositol; pyridoxine-HCl 0.5 mg/l; thiamine-HCl 0.1 mg/l; nicotinic-acid 0.5 mg/l; glycine 2 mg/l. The second stage is observed and the percentage of contaminant fungi. The observed contaminants character includes the colour, the direction of growth, and the hyphae colony's shape. Determination of contaminants type compared to the morphology of references. The result is the highest contamination in flower stalk explants, 81%; most colonies on leaf explants are 28. Contaminant fungi grow predominantly of fungi with white and grey colour and a rough surface shape. The macroscopic character of contaminant fungi in tissue cultures mostly comes from the class of Deuteromycetes and Zygomycetes.Keywords: Bromheadia finlaysoniana ,  contaminant, fungi, tissue culture
The Effectiveness of The Form And Method of Giving Solid Organic Fertilizer to The Growth and Yield of Sweet Corn (Zea mays saccharata Sturt) in Inceptisols Simanihuruk, Bilman Wilman; Anugerah, Ade; Gusmara, Herry
Akta Agrosia Vol 24 No 2 (2021)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

This study aims to obtain a combination of organic fertilizers and the method of giving solid organic fertilizer to the growth and yield of sweet corn. The research was conducted from March to May 2019 in Karang Dapo Village, Bingin Kuning District, Lebong Regency, Bengkulu Province. This study used a Complete Randomized Block Design (RCBD) with one factor and three replications, consisting of 11 combinations namely control, solid organic fertilizer (SOF) dose of 2,5 tons ha-1 by localized placement,  5 tons ha-1 by localized placement, Petroganic 500 kg ha-1 by localized placement, Petroganic 1000 kg ha-1 by localized placement, Petroganic 2000 kg ha-1 by localized placement, SOF 2,5 tons ha-1 by side dressing SOF 5 tons ha-1 by side dressing, Petroganic 500 kg ha-1 by side dressing, Petroganic by 1000 kg ha-1 by side dressing, Petroganic 2000 kg ha-1 by side dressing. There were 11 treatment combinations, each treatment was replicated 3 times, so that 33 experimental units were obtained. The results showed that the distribution of SOF 5 tons ha-1 by localized placement had an effect on stem diameter which gave of 3.25 cm, the number of leaves 13.1 strands, and percentage of cob worth selling 100%. Giving SOF 5 tons ha-1 by localized placement giving yields reached 34.4 tons ha-1. Giving organic fertilizer gives better results than without applying organic fertilizer to all observed variables.Keyword: Solid Organic Fertilizer, Petroganic, Sweet corn, localized placement, side dressing

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