Diversity of diseases of rice (Oryza sativa) in Kutai Kartanegara, Indonesia

Sopialena, Sopialena; Sofian, Sofian; Nurdiana, Juli

doi:10.13057/asianjagric/g030204

Cited by 8 publications

(4 citation statements)

References 19 publications

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“…Species 373, the most virulent race, was discovered in two locations in the Maros Regencies. Race 001 is Indonesia's most dominant race [21]. The dominant blast pathogen race in an area can change due to changes in genetic composition, and the blast fungus has a high mutation rate [22].…”

Section: Discussionmentioning

confidence: 99%

Population structures of Pyricularia oryzae Cavara in South Sulawesi

Kuswinanti

Patandjengi

Amin

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Blast disease caused by Pyricularia oryzae is one of the major rice diseases affecting rice output in Indonesia causing a 90% reduction in yield. This study aimed to determine the distribution of Pyricularia oryzae virulence pathotypes (races) in several South Sulawesi regencies. The P. oryzae races were determined in the Green House using 7 rice differential varieties: Asahan, Cisokan, IR 64, Krueng Aceh, Cisadane, Cisanggarung, and Kencana Bali. A total of 72 P. oryzae isolates from Maros, Gowa, Bone, and Pinrang Regencies were tested. The IRRI evaluation standard assessed the disease intensity seven days after inoculation. There were a total of 24 race compositions of P. oryzae were discovered based on the reactions of different rice varieties. However, only two races were dominant. Race 001 was dominant among Pinrang and Maros isolates, whereas race 020 was dominant in Bone and Gowa. Based on this result, monitoring of disease severity and the dynamics of P. oryzae population race structures is important for the breeding and rational distribution of resistant rice varieties.

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Section: Discussionmentioning

confidence: 99%

Population structures of Pyricularia oryzae Cavara in South Sulawesi

Kuswinanti

Patandjengi

Amin

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…This report is the first report in West Nusa Tenggara that one of the causes of damage to rice plant tissue is the blast disease Pyricularia oryzae. Several previous research in Indonesia reported that the cause of blast disease in rice crops in Bali by Magnaporte oryzae (Sugiarta et al 2021), Pyricularia oryzae found in West Java, Lampung, South Sumatra, West Kalimantan, and Bali (Kadeawi et al 2021), and Pyricularia grisea found in East Kalimantan (Sopialena et al 2019).…”

Section: Discussionmentioning

confidence: 96%

First report of Pyricularia oryzae the cause of blast disease in upland rice, in Lombok, West Nusa Tenggara

SANURIZA,

SUPRAPTA,

KAWURI

et al. 2024

Biodiversitas

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Rice (Oryza sativa L.) is a maincrop cultivated by farmers in Indonesia. The demand for rice has increased, but rice production has decreased due to attacks by plant pests, including pathogen blast disease. This research aims to (i) determine the symptoms of blast disease in upland rice in Lombok, (ii) determine the incidence of blast disease in upland rice in Lombok, (iii) and identify the pathogen that causes blast disease in upland rice in Lombok. The research was conducted in Lombok, West Nusa Tenggara. A sampling of rice crop tissue infected by blast disease was taken from 50 dryland locations in Lombok West Nusa Tenggara. From each point, three samples of rice crops with blast symptoms were taken to obtain 150 samples. Samples are then isolated and identified at the macroscopic, microscopic, and molecular levels. The study results showed that the macroscopic characteristics of rice leaves were rhombus-shaped and brown, and the pathogen produced white mycelium with a fine structure. In contrast, microscopic characteristics showed that the shape of the hyphae was septate, the structure of conidiophore with autophagic cell death, long pyriform microconidia, and long pyriform macroconidia. Based on 18S rRNA gene analysis, the Blast Lombok isolate had a DNA fragment of ±550bp. Based on these results, it can be concluded that the cause of blast disease in upland rice in Lombok, West Nusa Tenggara, is P. oryzae.

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“…The Central Statistics Agency (BPS) reported that total rice production in Indonesia was 54.42 million tons of milled dry grain (GKG) in 2021. This figure decreased by 233.91 thousand tons or 0.43 percent compared to 2020 rice production, which was 54.65 million tons of milled dry grain (Sopialena and Nurdiana, 2019). One of the factors that affect the lack of rice production is the presence of plant diseases.…”

Section: Introductionmentioning

confidence: 97%

Pyricularia Oryzae: Races Distribution and Screening of Fungal Antagonists in Vitro

Kuswinanti

Patandjengi

Amin

2023

Pak. J. Phytopathol.

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One of the suggested blast disease management approaches is integrated disease control, which combines cultivation practices, resistant cultivars, and fungicide applications as appropriate. Planting resistant varieties are the most costeffective option, but the resistance is quickly broken down over seasons and areas due to the existence of many races. Planting resistant varieties should therefore be accompanied by other control methods like biological control techniques. Selecting varieties with resistant gene(s) that match the pathogen race in the field is recommended. It is therefore critical to monitor the race composition in the area. This study aimed to determine races of Pyricularia oryzae isolated from different subdistricts in Pinrang, Bone, Maros, and Gowa regencies and the potential of rhizosphere fungal isolates to inhibit the growth of three dominant fungal blast races. Pyricularia oryzae was isolated on rice that showed specific symptoms of blast disease. Blast pathogen was grouped into races using 7 rice differential variety sets: Asahan, Cisokan, IR64, Krueng Aceh, Cisadane, Cisanggarung, and Kencana Bali. Observations were carried out 7 days after inoculation based on the standard evaluation system according to IRRI. The antagonists were isolated from the rhizosphere of healthy rice plants, followed by the dual culture test on Potato Dextrose Agar (PDA). A total of 42 isolates were collected from blast-infected rice, and 14 isolates were obtained from the rice rhizosphere. Based on the reactions of 7 differential varieties, a total of 18 races were determined. Races 000 and 001 were dominated with every 6 isolates, followed by races 003 and 020 with 5 isolates each, and races 033 and 013 with 4 and 3 isolates respectively. The other races were found only every two or single isolate. Dual culture using fungal rhizosphere isolates revealed that five isolates had inhibition above 75% against 3 representative races of P. oryzae. Based on the findings, it is suggested that the variation of P. oryzae races in 4 regencies in South Sulawesi is significantly high, and dominated by 2 races. The five rhizosphere fungal isolates may be used as potential bioagents for the eco-friendly management of rice blast disease.

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Diversity of diseases of rice (Oryza sativa) in Kutai Kartanegara, Indonesia

Cited by 8 publications

References 19 publications

Population structures of Pyricularia oryzae Cavara in South Sulawesi

Population structures of Pyricularia oryzae Cavara in South Sulawesi

First report of Pyricularia oryzae the cause of blast disease in upland rice, in Lombok, West Nusa Tenggara

Pyricularia Oryzae: Races Distribution and Screening of Fungal Antagonists in Vitro

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