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31

Current strategies for monitoring and managing Asian soybean rust in Brazil

Presenter: Claudia Vieira Godoy(1)

Other authors and affiliations: Amélio Dall’ Agnol(1), Claudine Dinali Santos Seixas(1), Rafael Moreira Soares(1), Emerson M. Del Ponte(2). (1)Embrapa Soja, Londrina, Paraná 86001-970, Brazil; (2)Universidade Federal do Rio Grande do Sul, Fitossanidade, Porto Alegre, Rio Grande do Sul 91540-000, Brazil

Since its first report in Brazil in 2001, Asian soybean rust (ASR) has spread quickly over the main soybean areas. Economic losses due to ASR have been estimated over U$ 7 billion, which includes yield losses and costs for disease control. In 2004, an initiative called “Consórcio Antiferrugem” was established under the coordination of the Ministry of Agriculture, Livestock and Supply. Its main goal is to summarize and deliver information for better disease management practices. The consortium is formed by several public and private institutions linked in a network of 159 experts and 85 accredited laboratories spread over 17 Brazilian states. One of the most important control measures adopted was the establishment of a “free host period” (FHP) in the states of Mato Grosso, Goiás, and Tocantins, starting in the 2005-2006 season. In that year, with a FHP from June 15 to September 15, a significant delay in ASR occurrence was observed in Mato Grosso State compared with an earlier disease onset usually observed in the previous seasons. The FHP was extended to other states in the following season. Survival of the fungus during the winter growing season had been considered the main reason for the higher pressure and early onset and epicenter for ASR epidemics. Starting in October 2007, a new website was created (www.consorcioantiferrugem.net). This site offers updated information to help disease identification, control measures, and show the new occurrences of ASR through a new web mapping system.

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