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Invasion of soybean rust and its management, from Brazilian experiences
https://doi.org/10.34556/0002000706
https://doi.org/10.34556/0002000706a50bf340-8c2e-4dfb-9f6a-f2a3caeb7cf3
| 名前 / ファイル | ライセンス | アクション |
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International_symp2019-_53-58 (962.9 KB)
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| Item type | 国際農研デフォルトアイテムタイプ（フル）(1) | |||||||
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| 公開日 | 2025-02-07 | |||||||
| タイトル | ||||||||
| タイトル | Invasion of soybean rust and its management, from Brazilian experiences | |||||||
| 言語 | en | |||||||
| 作成者 |
Godoy, Claudia Vieira
× Godoy, Claudia Vieira
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| アクセス権 | ||||||||
| アクセス権 | open access | |||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||
| 内容記述 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | The cultivated soybean area in 2018/19 in Brazil reached 35.8 million hectares (Conab, 2019). One disease that threatens the sustainability of the crop and represents a breakthrough in the history of soybean in Brazil is Asian soybean rust, caused by the fungus Phakopsora pachyrhizi. The disease was first reported in Paraguay in 2001 and in the west of the state of Paraná, Brazil, spreading, within three years, throughout South America (Yorinori et al. 2005). Epidemics of the disease were common in the country, where the fungus can survive year-round. Management and regulatory measures were adopted to reduce the inoculum between crop seasons (soybean-free period) and to curb late sowing of soybeans. Varieties with resistant genes have been available in the Brazilian market since 2009. Fungicide applications are recommended for these varieties due to the variability of the fungus’ ability to overcome the resistance genes. The most important soybean rust control strategy in Brazil has been the early sowing of short-cycle varieties after the soybean-free period, escaping the higher inoculum pressure period. The use of fungicides is one of the strategies adopted in the management of the disease. Fungicide application costs in soybean were estimated at US$ 2.9 billion in 2018/19, with an average of 2.75 fungicide applications per soybean crop season. Since 2003/04, uniform field trials have been carried out in different producing regions in order to compare the efficacy of registered fungicides and those in the registration phase. Besides the fungicides’efficacy, the results allowed accompanying changes in the sensitivity of the fungus to the different modes of action over the years, along with bioassays and molecular analyses. Reduced fungicide efficacy in the uniform field trials was reported for the demethylation inhibitors (DMIs) in 2007, the quinone outside inhibitors (QoIs) in 2013, and for the succinate dehydrogenase inhibitors (SDHIs) in 2016. At least six CYP51 mutations (Y131F/H; F120L; K142R; I145F; I475T) and overexpression are involved in the sensitivity reduction towards DMIs (Schmitz et al., 2014). For QoI, the F129L mutation was reported at high frequency (～90%) in 2013/14 isolates (Klosowski et al., 2016) and remained stable in the subsequent crop seasons. SDHI fungicides were used on soybean in Brazil for the first time in 2013/14 and strains of P. pachyrhizi with a lower sensitivity were found in monitoring studies in 2015/16, with a mutation in the C-I86F gene (Simões et al., 2018). With the P. pachyrhizi resistance to single-site fungicides, the efficacy of multi-site fungicides (mancozeb, chlorothalonil, and copper) has also been evaluated in the uniform field trials and their use in Brazil to control Asian rust has increased. Even though all major single-site mode of action fungicides used for soybean rust control (DMI, QoI, and SDHI) have experienced adaptation by P. pachyrhizi in Brazil, they still contribute to disease control when associated with other management strategies. | |||||||
| 言語 | en | |||||||
| 内容記述 | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | JIRCAS International Symposium 2019, Session 2: Important Migratory Diseases and Quarantine Chair: Yoshimichi Fukuta |
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| 言語 | en | |||||||
| 出版者 | ||||||||
| 出版者 | Japan International Research Center for Agricultural Sciences (JIRCAS) | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||||
| 資源タイプ | conference presentation | |||||||
| 出版タイプ | ||||||||
| 出版タイプ | VoR | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
| ID登録 | ||||||||
| ID登録 | 10.34556/0002000706 | |||||||
| ID登録タイプ | JaLC | |||||||
| 関連情報 | ||||||||
| 関連タイプ | isPartOf | |||||||
| 識別子タイプ | DOI | |||||||
| 関連識別子 | https://doi.org/10.34556/0002000694 | |||||||
| 関連名称 | International research collaboration to tackle transboundary plant pests : Contributions to Sustainable Development Goals | |||||||
| 書誌情報 |
en : JIRCAS International Symposium Proceedings : International research collaboration to tackle transboundary plant pests : Contributions to Sustainable Development Goals 巻 2019, p. 53-58, 発行日 2020-01 |
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| 会議記述 | ||||||||
| 会議名 | JIRCAS International Symposium 2019 : International research collaboration to tackle transboundary plant pests : Contributions to Sustainable Development Goals | |||||||
| 主催機関 | Japan International Research Center for Agricultural Sciences (JIRCAS) | |||||||
| 開催期間 | 2019-11-26 | |||||||
| 開催会場 | Convention Hall 200, Tsukuba International Congress Center | |||||||
| 開催国 | JPN | |||||||
