Article Per Year (5 Year)
p-Index From 2019 - 2024
0.23
P-Index
This Author published in this journals
All Journal Jurnal Fitopatologi Indonesia Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) Jurnal Perlindungan Tanaman Indonesia
Achmadi Priyatmojo
Fakultas Pertanian Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Medicine & Pharmacology

Published : 9 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 9 Documents
Search

 1 
Komponen Epidemi Penyakit Busuk Akar dan Pangkal Batang Tebu di Sumatera Selatan Tri Maryono; Ani Widiastuti; Rudi Hari Murti; Achmadi Priyatmojo
Jurnal Fitopatologi Indonesia Vol 16 No 2 (2020)
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14692/jfi.16.2.49-60

Abstract

Epidemic Components of Sugarcane Root and Basal Stem Rot In South Sumatra Root and basal stem rot disease is one of new disease that currently was became a emerging problem on sugarcane plantations in Lampung and South Sumatra. The research was aimed to study the model of disease progression, AUDPC, infection rate (r), and the influence of weather and soil condition (physical and chemical properties of soil) on the development of sugarcane root and basal stem rot disease. The research was conducted on sugar cane plantation in South Sumatra. The disease incidence in three varieties was observed weekly in the field which had infected plant in previous year.. The data were analyzed to develop model of the disease progression, AUDPC, and the rate of root and basal stem rot disease. Weekly weather data was acquired from weather station of Sultan Mahmud Badaruddin Airport, Palembang. Soil sample was taken from three disease category i.e moderate (disease incidence 25,1% - 50%), severe (disease incidence 50,1% - 75%), and healthy (no disease). The results showed that the disease develops following monomolecular and logistic models. The AUPDC and infection rate (r) in the monomolecular model were lower than in the logistic model. The direct effect coefficient of rainfall and relative humidity (RH) on the disease were positive (1.27 and 0.46 respectively), contrary the temperature and duration of irradiation which had a negative coefficient (-0.33 and -0.45 respectively). Meanwhile, K availability and permeability give a positive effect on the disease, while the total N and Fe availability give a negative effect on the disease.
Penerapan Teknologi Tepat Guna Padi Sawah Spesifik Lokasi di Dusun Ponggok, Trimulyo, Jetis, Bantul Sri Nuryani Hidayah Utami; Achmadi Priyatmojo; Subejo Subejo
Jurnal Pengabdian kepada Masyarakat (Indonesian Journal of Community Engagement) Vol 1, No 2 (2016): Maret
Publisher : Direktorat Pengabdian kepada Masyarakat Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (439.442 KB) | DOI: 10.22146/jpkm.10610

Abstract

The role of technology is very important in supporting improvement of agricultural production. The high-tech strategic role was demonstrated by the success in achieving increased production of rice within the last 35 years is the contribution of the application of more advanced technology. Mosher et al. (2003) put technology as an essential condition for agricultural development. If there is no change in the technological development of agriculture was halted. Production halted the increase, it may even decline because of declining fertility tannic or because of damage increased by pest play an increasingly rampant. A view to changing the technology, can be interpreted as an adaptive technology on the condition of the biophysical and social environment of the local culture. Practical application of specific technologies by farmers, for example how farmers adjust to the conditions of cultivation of local agro-ecosystem forming a specific production system on irrigated land, rainfed lowland, upland, swampy areas, and tidal. Choice according to agro-ecosystem farmers are adapting cultivation is calibration-specific technologies. It’s caused each commodity grows well on climatic conditions, soil and culture-specific social support. Community service activities has been implementing the specific technology that is enriched with appropriate technology research team of the Faculty of Agriculture of UGM by utilizing site-specific conditions of Ponggok Hamlet, Trimulyo, Jetis, Bantul, which have ingredients that can be used for making fertilizer and also wisdom locations in rice cultivation which has been done by farmers for generations. Community Service Team of Faculty of Agriculture, UGM during 2013-2015 had engaged in community service based on the results of research and appropriate technologies in Ponggok Hamlet, for 2 seasons seen significant progress and participation of farmers. In 2013 the results of the demonstration plot tile average of 6.8 tons/ha, after continuous mentoring and counseling in 2014 the results of tile becomes 7.8 to 9.8 tons/ha. Activities application of appropriate technology in a farmer’s land is not easy. Although guidance and counseling has been done before, but not all farmers want and dare to carry out all of the technology that is recommended because it is still in doubt, especially with regard to plant spacing, seed age and the number of seedlings planted. In 2015, a technology package has been introduced covering healthy seedlings, planting system “footprint tiger”, “tajarwo”, homemade compost with waste around the site and biological fertilizers. The results of the application of specific technologies in the growing season of April to July 2015 showed an increase in rice production, but the farmer as a principal factor remains the key to successful application of the technology.
Peranan Faktor Cuaca terhadap Infeksi dan Perkembangan Penyakit Bercak Ungu pada Bawang Merah Bambang Hadisutrisno; Sudarmadi Sudarmadi; Siti Subandiyah; Achmadi Priyatmojo
Jurnal Perlindungan Tanaman Indonesia Vol 1, No 1 (1995)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.9351

Abstract

Purple blotch disease caused by Alternaria porri (Ell.) Cif. is one of the most important diseases on shallots. The farmers have been using fungicides as a reliable control method, however, the chemical control method has to be considered for the negative effect on the environment and the danger to the other species and causes the resistance to a certain pesticide. Therefore, it is important to develop other method that is safe, effective, and efficient, like the use of climatic data to decide the control strategy. The result of the study on ecology of purple blotch disease carried out at the experimental station in Kramat-Tegal, Kledung-Temanggung, and KP4 Kalitirto in dry and rainy season (1991/1992) suggested that climatic factors played on important role on the daily conidium dissemination of Alternaria porri and on the intensity of purple blotch disease. Daily conidium dissemination which was one of the important component in the epidemy of purple blotch disease was influenced by the temperature, relative humidity, and the wind velocity. Conidium dissemination was occurred both during the day and night and at 10.00 am-14.00 pm when the air temperature and wind velocity were high with low relative humidity, conidium dissemination was maximum. On the other hand, at 22.00 pm – 02.00 am there was minimum conidium dissemination. The result on the effects of leaf wetness period on disease intensity suggested that high humidity was not the only factor caused disease infection but it has to be supported by the presence of thin film water on the leaf surface at least for 4 hours since the attachment of the conidia on the leaves.
Ekstraksi DNA Phytophthora palmivora Isolat Kelapa Achmadi Priyatmojo; Siti Subandiyah
Jurnal Perlindungan Tanaman Indonesia Vol 2, No 1 (1996)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6570.787 KB) | DOI: 10.22146/jpti.9358

Abstract

Coconut isolate of Phytophthora palmivora DNA was extracted from sporangium and mycelium using SDS and Proteinase-K method. Sporangium and mycelium were harvested from liquid and solid culture of Potato Dextrose medium. The result of the study showed that the DNA extracted from sporangium and mycelium of 8 days solid culture was seen as distinct band. On the other hand, the dNA from sporangium and mycelium of 24 days old liquid culture was fragmented with smear band appearance.
Hubungan Antara Inokulum Awal Patogen dengan Perkembangan Penyakit Hawar Upih pada Padi Varietas Ciherang Bambang Nuryanto; Achmadi Priyatmojo; Bambang Hadisutrisno; Bambang Hendro Sunarminto
Jurnal Perlindungan Tanaman Indonesia Vol 16, No 2 (2010)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.11724

Abstract

Study on the role of initial inoculums on disease development of rice sheath blight caused by Rhizoctonia solani Kühn was conducted in glass house at the Faculty of Agriculture University of Gadjah Mada from December of 2009 to July of 2010. The aim of this study was to evaluate the importance of sclerotia and mycelium in plant debris as primary inoculum form of R. solani. Results indicated that both sclerotia and mycelium in plant debris significantly affect the development of rice sheath blight. Disease severity was closely related to the number of sclerotia on rice plant. The highest disease severity was observed in plant inoculated with 10 sclerotia per hills. Treatments of 6 sclerotia and 5 g plant debris per hills had comparable effect on disease severity and area under disease progress curve of rice sheath blight. The results suggested that sclerotia and mycelia in plant debris might play a major role as primary inocula of the disease in rice growing field.
Penapisan PGPF untuk Pengendalian Penyakit Busuk Lunak Lidah Buaya (Aloe vera) di Tanah Gambut Supriyanto Supriyanto; Achmadi Priyatmojo; Triwidodo Arwiyanto
Jurnal Perlindungan Tanaman Indonesia Vol 15, No 2 (2009)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.11768

Abstract

Aloe (Aloe vera) planted in West Borneo peat soil is well known as having the best product quality in Indonesia. Soft rot disease is one of the constraints of Aloe cultivation on peat soil. Many methods have no significant result for controlling this disease. This research objectives are to obtain Plant Growth Promoting Fungi (PGPF) for controlling Aloe bacterial soft rot in peat soil. The research was conducted in Clinical Laboratory of Plant Pathology and glass house of Faculty of Agriculture, Gadjah Mada University, Yogyakarta from October 2008 to September 2009. The methods included fungal isolation from peat land, hypovirulent and PGPF ability test, and biological control test in the glass house. Among 42 peat soil fungi tested, 28 isolates were hypovirulent and only 2 isolates i.e. SNTH001 (Penicillium sp.) and SNTH003 (Aspergillus sp.) showed the PGPF ability. Glass house trial showed that single application of SNTH001 and SNTH003 isolates were able to increase the growth of Aloe. In the biological control of Aloe soft rot disease test showed that the lowest intensity (25%) might be obtained by using SNTH001 isolate.
Penekanan Penyakit Lincat Tembakau Temanggung dengan Streptomyces spp. Triwidodo Arwiyanto; Kharis Haryono; Achmadi Priyatmojo; Toekidjo Martoredjo; Gembong Dalmadiyo
Jurnal Perlindungan Tanaman Indonesia Vol 13, No 1 (2007)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.11777

Abstract

Streptomyces is one of a soil microorganisms which is rarely used by Indonesian researcher for biological control of planth pathogent. Local isolates of Streptomyces spp. were used in this study to control "lincat disease" of Temanggung tobacco. Ninety four isolates of Streptomyces were tested directly in the field to suppress the development of lincat disease in the field. Six isolates, i.e. Stre-4, Stre-7,Stre-48, Stre-61, Stre-66 and Stre-67 suppressed the disease development with various degree. It was likely that decreasing the concentration of bacterial antagonist gave better protection against the disease. In vitro experiments indicated that there was no correlation between inhibition pathogen in vitro and ability to suppress disease in the field. The result showed that selection of antagonist in vitro based on antibiosis will eliminate the chance to get other potential antagonist.
Identifikasi Morfologi Beberapa Spesies Jamur Fusarium Ade Mahendra Sutejo; Achmadi Priyatmojo; Arif Wibowo
Jurnal Perlindungan Tanaman Indonesia Vol 14, No 1 (2008)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.11870

Abstract

The research was conducted to study the morphological difference based on macroscopic and microscopic appearance of several Fusarium spp. Fusarium spp. isolates were propagated onto Potato Dextrose Agar (PDA) by using single-spore method. All isolates were observed macroscopically and microscopically to determine colony appearance, colony growth diameter and formation of macroconidia, microconidia and conidiophores. The results showed that colony appearance of all isolates was similar. Therefore they could not clearly be differentiated by one to another. On the other hand, microscopic observation showed that there was different conidiophore morphology of F. oxysporum and other Fusarium spp. Microscopic morphology among F. oxysporum isolates were difficult to differentiate. Microconidia were produced in false-head which was the characteristic feature of most F. oxysporum. In conclusion, microscopic morphology observation could only be able to differentiate Fusarium spp. isolates at species level, but not to formae speciales.
Tipe Mating pada Empat Isolat Thanatephorus Cucumeris Anamorf: Rhizoctonia solani) Anastomosis Group (AG) 1-IC Achmadi Priyatmojo
Jurnal Perlindungan Tanaman Indonesia Vol 12, No 2 (2006)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12077

Abstract

Four parent isolates (189, Rh28, BW3 and F-1) of Thanatephorus cucumeris (anamorph: Rhizoctonia solani) AG 1-IC were induced to produce basidiospores using soil-over culture method. All of four parent isolates could produce basidiospores. Colonies obtained from single basidiospore isolate of each parent isolate were paired on charcoal potato dextrose agar. Single basidiospore isolate having different mating type produced tuft at area of the junction of paired colonies. On the based of tuft formation, single basidiospore isolates of each parent isolate could be divided into two different mating types, therefore it is concluded that each of 189, Rh28, BW3 and F-1 isolate of T. cucumeris AG I-IC has bipolar mating type.
Co-Authors Ade Mahendra Sutejo Ani Widiastuti Arif Wibowo Bambang Hadisutrisno Bambang Hendro Sunarminto Bambang Nuryanto Gembong Dalmadiyo Kharis Haryono Murti, Rudi Hari Sri Nuryani Hidayah Utami Subandi Subejo Sudarmadi Sudarmadi Supriyanto Supriyanto Toekidjo Martoredjo Tri Maryono Triwidodo Arwiyanto