Asian soybean rust: modeling the impact on soybean grain yield in the Triângulo Mineiro/Alto Paranaíba region, Minas Gerais, Brazil
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2013-04
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Resumo
Understanding the impact of Asian soybean rust on soybean yield is of great importance in the
crop simulation model for this crop become it is possible to predict yield using different sowing dates and growth
conditions. The goal of this study were to evaluate the performance of two soybean cultivars in Triângulo Mineiro/Alto
Paranaíba, MG, Brazil and the effects of soybean rust on the yield of these cultivars using the CSM-CROPGRO Soybean
model. Two soybean cultivars “NK 7074” (early) and “UFUS-Impacta” (medium late), which differ in their development
cycles, were growing in Uberaba city during the 2009/2010 growing season. The validation for cultivar “UFUS-Impacta”
was conducted comparing the measured and simulated yield data considering three different sowing dates in the
“Uberlândia” city during the 2002/2003 growing season. Daily meteorological data obtained from six meteorological
stations of the National Institute of Meteorology (INMET). To determine the performance of the soybean cultivars and the
effect of soybean rust on yield, three different scenarios were used: no occurrence of rust (NOR) and occurrence of rust
with inoculum concentrations of U5.000 and U10.000 urediniospores/mL. For all environments studied, the early cultivar
had the best performance than the medium late cultivar. Soybean rust had the most effect on yield for the U10.000 scenario
than for the U5.000 scenario. The best soybean performance occurred for “Araxá” and “Uberaba” cities. The South-
Southeast area of the “Triângulo Mineiro/Alto Paranaíba” region was the most sensitive to the effect of rust on yield
compared to the North region.
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Glycine max, Phakopsora pachyrhizi, Modeling, Glycine max, Modelagem, Phakopsora pachyrhizi
Citação
RODRIGUES, Rafael de Ávila; JULIATTI, Fernando Cezar; PEDRINI, João Eduardo; FERNANDES, José Maurício Cunha; JUSTINO, Flávio Barbosa ; HEINEMANN, Alexandre Bryan; FRAISSE, Clyde William; FARIAS, José Renato Bouças; PAVAN, Willingthon; COSTA, Luiz Cláudio; VALE, Francisco Xavier Ribeiro do; REZENDE, Anakely Alves. Asian soybean rust: modeling the impact on soybean grain yield in the Triângulo Mineiro/Alto Paranaíba region, Minas Gerais, Brazil. Bioscience Journal, Uberlândia, v. 29, n. 2, p. 264-279, Mar./Apr. 2013.