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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 133 Documents
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Amelioration of Salinity Stressed Soil Using Natural Zeolite for Improving Soil Properties and Chinese Cabbage Agronomic Performances Romadhan, Tantrie D; Marwanto, Marwanto; Murcitro, Bambang G; Handajaningsih, Merakati
Akta Agrosia Vol 25 No 1 (2022)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

Salinity stress is the major abiotic stress for crop production. The purpose of this study was to evaluate the effectiveness of zeolite on improving soil properties, the growth, and yield of Chinese cabbage. This pot experiment was conducted from September to November 2020 at the Research and Teaching Field of the Faculty of Agriculture, consisted of 6 treatment levels, i.e. (1) control, (2) soil + 6.9 g NaCl /10 kg soil, (3) soil + 6.9 g Na2SO4 /10 kg soil, (4) soil + 3.2 g zeolite /10 kg soil, (5) soil + 6.9 g NaCl /10 kg soil + 3.2 g zeolite /10 kg soil, and (6) soil + 6.9 g Na2SO4 /10 kg soil + 3.2 g zeolite /10 kg of soil, and arranged in a completely randomized design with 3 replications. The application of zeolite decreased the EC of salinized soil and increased the soil CEC. NaCl salinity stress reduced plant height (23%), number of leaves (22%), fresh weight of roots (165%), dry weight of roots (170%), stalk length (32%), and plant dry weight (131%), while Na2SO4 salinity stress only reduced the number of leaves (23%). The addition of zeolite to salinized NaCl soil increased stalk length (39%), plant fresh weight (172%), leaf fresh weight (174%), plant dry weight (133%), and leaf dry weight (23%), while to salinized Na2SO4 soil only increased plant dry weight (90%) and leaf dry weight (177%). The overall results show that the addition of zeolite can effectively ameliorate salinity stress due to NaCl.
Pathogenicity of Indigenous Entomopathogen Liquid Formulation to Paddy Bugs Nymphs (Leptocorisa acuta Thunberg) Mulyani, Rahmawati Budi; Melhanah, Melhanah; Advianto, Petrayadi; Djaya, Adrianson A
Akta Agrosia Vol 25 No 1 (2022)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

The purpose of this study was to determine the effectiveness of bio insecticide liquid formulations made from indigenous entomopathogens against paddy bugs nymphs. The study used a non-factorial Complete Randomized Design with 9 treatments and 1 control with five replications. The treatments studied consisted of E0: Control, E1: Beauveria sp Pky isolate + coconut water (CW), E2: Metarhizium sp isolate Jjt + AK, E3: Beauveria sp isolate Jts + CW, E4: Metarhizium sp isolate Lcc + CW, E5: Beauveria sp Pky isolate + shrimp shell extract (SSE), E6: Metarhizium sp isolate Jjt + SSE, E7: Beauveria sp isolate Jts + SSE, E8: Metarhizium sp isolate Lcc + SSE, E9: Synthetic insecticide b a Carbamate (Dharmabas 500 EC 2 ml L-1). The result showed that liquid bioinsecticide formulations were effective against mortality, infected nymphs and nymph death time. All entomopathogenic fungi isolates were able to cause infections in paddy bugs nymphs of 68% - 84%. Beauveria sp Pky isolate and Metarhizium sp isolate Jjt caused nymph mortality of 72% - 84% and the effectivity did not differ from insecticide b.a. Carbamate. Conidia viability of all entomopathogenic isolates in liquid media within 24 hours reached more than 80%. The fastest time to death of paddy bugs nymph occurred at 5.44 days ( Metarhizium sp. isolate) and 5.92 days (Beauveria sp. isolate) in coconut water media. Metarhizium sp. and Beauveria sp. in the medium of coconut water or shrimp shell extract has a very high potential to be developed as a bio insecticide, but it still needs to be further tested for its effectiveness in field conditions.Keywords: indigenous entomopathogen, coconut water, shrimp shell extract, paddy bugs nymph
Vegetative Growth Response of Soybean (Glycine max L. Merril) After Applicated Several Plant Growth Regulators (PGRs) Mangais, Rowland; Rampe, Henny L.; Siahaan, Parluhutan
Akta Agrosia Vol 25 No 1 (2022)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

Vegetative growth of plants can be influenced by internal factors including hormones (Plant Growth Regulators). The purpose of the study is to determine the growth response of soybean ( Glycine max L.Merril) after application of some plant growth regulators (PGRs). The research method used was Completely Randomized Design (CRD). There were four levels of extract concentration that were applied namely P0: Control, P1: onion extract, P2  bamboo shoot extract, and P3:  banana weevil extract. Data of the growt parameters were analyzed with ANOVA (Analysis of Variance) and continued with LSD 0.05 test. Results of the study showed that the application of PGRs from extracts of onion , bamboo shoots and banana weevil give the  increase of growth in height of plants  in 15 days after planting, fresh  weight, dry wight and root volume  of soybean (G. max). Application of PGRs couldn’t give any effect in high, number of leaves and ratio of canopy roots 27 days after planting.Keywords : Glycine max L. Merril , Vegetative growth, and Plant Growth  Regulators (PGRs
The Effect of Volume and Inoculation Method on the Development of Bacterial Panicle Blight Disease in Rice Plant Kusdiana, Alchemi Putri Juliantika; Hidayat, Joni; Zulaiha, Siti; Wahyudin, Denih
Akta Agrosia Vol 25 No 1 (2022)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/aa.25.1.17-23

Abstract

Bacterial panicle blight in rice plants caused by Burkholderia glumae. These bacteria interfere with the grain filling process so that the grain is not filled and can cause yield losses of up to 75% on pathogenic infested land. This study was conducted to determine the effect of B. glumaesuspension volume and inoculation method on the development of bacterial panicle blight. The research was conducted on vegetative and generative rice plants using a factorial completely randomized design with the volume of bacterial suspension as the first factor and the inoculation method as the second factor. The results showed that the higher the volume of the B. glumaesuspension inoculated, the higher the severity of bacterial panicle blight in rice plants. Both the inoculation and injection methods can cause the same disease severity. Besides, the severity of bacterial panicle blight in the generative phase is more severe than in the vegetative phase
Potential of some Rhizobacteria Isolates Antagonists in Various Formulation to Control Sheat Root Disease (Sarocladium oryzae) on Rice Plants Majid, Abdul; Dewi, Keke Yunadia Kumala
Akta Agrosia Vol 25 No 1 (2022)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

The reserach aims to determine the potential of antagonistic rhizobacteria and is appropriate formulations used to control sheat root disease (Sarocladium oryzae). This research was carried out in July to December 2019 in the Plant and Disease Laboratory and the Greean House Faculty of Agriculture Jember University. The experiment was conducted using a completely slot deposit 5000 randomized design (CRD) 2 factors, namely isolates and formulation. Isolates factors have 4 factors levels; control, Bacillus sp. isolate, Pseudomonas fluorescens isolate, and Bacillus sp. + Pseudomonas fluorescens isolate. The formulation factors has 4 factors levels; glucose 10% + potato water 70% + bacterial starter 20%, Fructose 20% + coconut water 60% + bacteria; starter 20%, glucose 10% + CMC 2% + monmorilonite 68% + bacterial starter 20%, fructose 20% + CMC 2% + kaolin 58% + bacterial starter 20%. The result showed that the treatment of Bacillus sp. with formulation glucose 10% + CMC 2% + monmorilonite 68% + bacterial starter 20%, showed the best result, with a control effectiveness of 78.31%. Key word; Formulation, Rhizobacteria antagonist, Sarocladium oryzae
The Potential of Bacillus sp.’s Isolate of Coffee Beans as Plant Pest Control Candidates Ekowati, Christina Nugroho; Siallagan, Maria Denada; Sumardi, Sumardi; Rosa, Emantis
Akta Agrosia Vol 25 No 2 (2022)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

Long-term use of chemical pesticides in high doses might result in chemical residues. Therefore, eco-friendly plant pest control should be getting more attention. To do so, one might consider the utilization of microorganisms that have the enzymatic ability to destroy the pest's body structure. This study aimed to explore the isolates of Bacillus sp. from coffee beans as a plant pest control candidate. Bacillus could be considered due to its ability to produce protein crystals and extracellular enzymes. Three isolates are obtained from isolation from coffee beans: Bacillus sp. 1; Bacillus sp. 2; and Bacillus sp. 3. These isolates have the enzymatic character of protease, chitinase, and lipase. The results of the bioassay test on larvae of Plutella xylostella (Lepidoptera order) showed that these isolates were able to cause larvae death within 48 hours.  
PEMODELAN POLA PRODUKTIVITAS TANDAN BUAH SEGAR (TBS) BERDASARKAN APLIKASI BEBERAPA AGEN HAYATI TERHADAP HAMA DI PERKEBUNAN KELAPA SAWIT Salmiyati, Salmiyati; Kuncahyo, Budi
Akta Agrosia Vol 25 No 2 (2022)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

Pests are controlled in oil palm plantations by using biological agents to achieve higher productivity of fresh fruit bunches (FFB) of oil palm (Elaeis guineensis Jacq.). This study aims to create a modeling pattern for oil palm FFB productivity based on application data of biological agents at several levels of planting age. The research was conducted in Pelalawan, Riau, namely on young plants, juvenile plants, mature plants and old plants on mineral soil. The data used are the application data of the biological agents Tyto alba, Antigonon leptosus and Turnera subulata. Data were analyzed using Cobb Douglas multiple linear regression and correlation analysis. The results of the regression analysis are used to build a model for predicting FFB productivity patterns using Stella Software. The results of the model regression analysis showed that the coefficient of determination was obtained at 0.265, meaning that together the variables Antigonon leptosus, Tyto alba and Turnera subulata affected FFB productivity by 26.5%. The results of the regression analysis showed that the effect of each Antigonon leptosus, Tyto alba, and Turnera subulata increased by 1%, so FFB productivity increased by 0.018, 0.024, and 0.028%, respectively. The modeling pattern for the development of biological agents shows that FFB productivity will increase and start to decrease at the ages of 14 - 30 years in young, juvenile, mature, and old plants. The total rate of increase from the application of biological agents is 0.047%.
Rice Seedling Resistance due to Seed Priming and Seeding Density under Submergence Stress Condition Sulaiman, Firdaus; Agus Suwignyo, Rujito; Hasmeda, Mery; Wijaya, Andi; Irmawati, Irmawati
Akta Agrosia Vol 25 No 2 (2022)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

The study of rice seedling resistance due to seed priming and seeding density under submergence stress condition was carried out to evaluate the effect of seed priming and also to estimate proper seeding population density to improve rice seedlings vigor under submergence stress condition. The เว็บสล็อต | R4shub experiment was conducted in tidal freshwater swamp of Sako in Rambutan District, Banyuasin Regency (3.067° S, 104.8616° E). Randomized block design was used where the seeds were soaked into ZnSO4.7H2O solution as priming treatment, and then sown with three different seeding rates: 30, 40 and 50 kg ha-1. Three cultivars consisted of Inpara 3, Inpara 5 and Ciherang were tested. The observation was carried out until 4 weeks after sowing to measure the seedling height, shoot dry weight, carbohydrate content in stem, and leaf chlorophyll. Results showed that all treatments indicated insignificant effect to all parameters. However, the highest result from all parameters was obtained from priming treatment. The higher seeding density the lower dry weight, carbohydrate and chlorophyll content. All three tested cultivars, Inpara 3 gave the best performance.  
KAJIAN EFEK RESIDU AMELIORAN IN SITU BATUBARA BITUMINOUS DAN LAPISAN PENGOTORNYA TERHADAP SIFAT FISIKA-KIMIA TANAH REKLAMASI TAMBANG BATUBARA DAN HASIL KEDELAI Khairul, Khairul; Ajidirman; Sunarti
Akta Agrosia Vol 25 No 2 (2022)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

Application of slow decomposed organic ameliorants is expected to have a long-term impact on improving soil Physico-chemical properties. The source of in situ organic carbon that is easy to obtain on coal mine reclamation land are the coal itself and its coal impurities (parting) ameliorants. They are slow to decompose, so the residue can last for a long time in the soil. This study aimed to examine the effect of first-year residue of both coal and parting as ameliorants on the improvement of the physical and chemical properties of coal mine reclaimed soil and soybean yields. A pot study was เว็บสล็อต | R4shub conducted using a randomized block design with 3 treatments. The treatments tested were residues from the first year of the administration of ameliorant in situ, namely: Control, Bituminous coal ameliorant residue, and parting. Both coal and parting were tested with 5 doses each consisting of 5, 10, 15, 20, or 25 tons ha-1. The results showed that the first-year residue of bituminous coal ameliorant and coal impurities significantly affected some of the chemical properties of coal mine reclaimed soil. Both types of ameliorant residues had a very significant effect on increasing C-organic, humic acid, and total N content. The highest increase in soil organic C was found in soil ameliorated by using bituminous coal residues at 25 tons ha-1, and those by using coal impurities at was 20 tons ha-1. However, treatments did not affect soybean growth and yield.    
The Ability of Compost Materials Containing Entomopathogen Metarhizium anisopliae (Metsch.) Sorokin to Suppress Oryctes rhinoceros L. Larvae Fauzana, Hafiz; Kortima, Eka; nelvia, Nelvia; Rustam, Rusli; Puspita, Fifi
Akta Agrosia Vol 25 No 2 (2022)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

Oryctes rhinoceros is one of the main pests in oil palm plantations. Biological control using Metharizium anisopliae has great potential to control O. rhinoceros larvae which are usually found in organic matter. This study aims to obtain the best organic compost material for the development of M. anisopliae as biological control against O. rhinoceros larvae. This research was conducted with a completely randomized design (CRD) consisting of 6 treatments, each treatment was repeated 5 times to obtain 30 experimental units. Each unit contained 10 O. rhino larvae. The concentration of M. anisopliae was 50 g / L of distilled water. The treatments of organic media consisted of 6 setting media, as follows: Oil Palm Empty Fruit bunch (OPEFB),  rice husk, sawdust, ½ part  OPEFB + ½ sawdust, ½ part OPEFB + ½ part rice husk, and ½ part rice husk + ½ part sawdust. The observations included the time of initial death, time of death, daily mortality, total mortality, changes in behavior and larvae morphology. Chemical analysis of OPEFB, temperature, and humidity were recorded. The results showed that compost from sawdust media had the tendency as the best media for the development of Metarizhium anisopliae. It had ability to infect O. rhinoceros larvae which caused larvae infection 72.50%.  

Page 10 of 14 | Total Record : 133

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