{"id":25697,"date":"2025-09-23T15:41:02","date_gmt":"2025-09-23T19:41:02","guid":{"rendered":"https:\/\/mmcereais.com.br\/2025\/soja\/ferrugem-asiatica-da-soja-tem-focos-identificados-na-safra-2024-2025\/"},"modified":"2025-09-23T15:41:02","modified_gmt":"2025-09-23T19:41:02","slug":"ferrugem-asiatica-da-soja-tem-focos-identificados-na-safra-2024-2025","status":"publish","type":"post","link":"https:\/\/mmcereais.com.br\/en\/2025\/soja\/ferrugem-asiatica-da-soja-tem-focos-identificados-na-safra-2024-2025\/","title":{"rendered":"Asian soybean rust outbreaks identified in the 2024\/2025 crop season."},"content":{"rendered":"

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Asian soybean rust, caused by the fungus Phakopsora pachyrhizi, registered its first occurrences in October 2024 in Rio Grande do Sul, shortly after the end of the sanitary break, in crops in Cruz Alta. Monitoring carried out by the Department of Agricultural Diagnosis and Research of the Secretariat of Agriculture, Livestock, Sustainable Production and Irrigation (DDPA\/Seapi) and by Emater\/RS-Ascar detected high levels of spores (infection) in the initial weeks of the 2024\/25 crop season, with emphasis on Muitos Cap\u00f5es (602 spores), Tr\u00eas Passos (372), Iju\u00ed (293) and Cruz Alta (205).<\/p>\n

The results are included in\u00a0Technical Circular No. 29<\/a>\u00a0\u2013 Monitoring Program for Rust in Rio Grande do Sul. October and November concentrated the highest levels of inoculum, followed by March. Among the regions, the Central Plateau presented the most critical situation, with 5,584 spores, followed by the Upper Plateau\u2013Northeast Mountains (2,908) and the Upper\/Middle Uruguay Valley (2,281). The analysis indicated that the fungal peaks occurred shortly after periods of rain and under conditions of high relative humidity.<\/p>\n

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Photo: Shutterstock<\/p>\n<\/div>\n

Despite the high initial infection rate, the climate slowed the spread of the disease. The 2024\/25 crop season was marked by climate neutrality\u2014without a predominance of El Ni\u00f1o or La Ni\u00f1a\u2014but with below-average rainfall in much of the state and heat waves in February and March, when temperatures exceeded 41\u00b0C. These factors reduced the formation of new outbreaks and resulted in less spread than observed in the previous crop season, when El Ni\u00f1o favored greater dissemination of rust.<\/p>\n

The study also involves the participation of other research institutions, in addition to the Department of Plant Protection (DDV\/Seapi). The director of the DDV highlights that the objective is to monitor the presence of the fungus in soybean production areas and identify the meteorological conditions favorable to its development, allowing for the creation of a risk prognosis for the occurrence of Asian soybean rust. \u201cThe information generated can be used to initiate disease control and to make decisions regarding the use of fungicides,\u201d emphasizes Ricardo Felicetti.<\/p>\n

Research and monitoring<\/b><\/h4>\n

The aerobiological monitoring program for soybean rust in Rio Grande do Sul maintains spore collectors in 77 soybean fields, distributed across 75 municipalities representing the state's 11 ecoclimatic regions. The data is updated weekly and made available on online maps, assisting producers in the preventive management of the disease.<\/p>\n

According to Dr. Andr\u00e9ia Mara Rotta de Oliveira, a phytopathologist at Seapi and one of the study's authors, the results of the Technical Circular "reinforce the relevance of climate monitoring combined with pathogen surveillance as an essential strategy for the preventive management of Asian soybean rust."<\/p>\n

Currently, the state is observing the soybean sanitary break period, in effect from July 3rd to September 30th, during which the maintenance of volunteer plants or plants in any stage of development is prohibited. This measure is considered fundamental to reducing the survival of the fungus between harvests.<\/p>\n<\/div>\n

THE MM Cereais<\/strong> works with the best grains on the market and also keeps you up to date with the latest news and analyses on agribusiness.
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Access News Source <\/a><\/p>","protected":false},"excerpt":{"rendered":"

A ferrugem asi\u00e1tica da soja, causada pelo fungo\u00a0Phakopsora pachyrhizi, registrou as primeiras ocorr\u00eancias j\u00e1 em…<\/p>","protected":false},"author":1,"featured_media":25698,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[259],"tags":[],"class_list":["post-25697","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soja"],"_links":{"self":[{"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/posts\/25697","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/comments?post=25697"}],"version-history":[{"count":0,"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/posts\/25697\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/media\/25698"}],"wp:attachment":[{"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/media?parent=25697"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/categories?post=25697"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/tags?post=25697"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}