Effects of Climate and Agricultural Practices on Temporal Progress of Sclerotinia sclerotiorum for Soybean in BrazilReportar como inadecuado




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Currently the soybean crop is affected by the white mold Sclerotinia sclerotiorum. The disease can reduce the crop yield and quality and decrease the prices of agricultural lands. The aim of the current research was to assess epidemiology of white mold on soybean crop grown at Arapoti, PR, Brazil, utilizing data related to agricultural practices and local meteorological factors. The experiment was conducted in a naturally infested area. The soybean crop was sown on October 18th, 2011. The experimental design adopted herein was a randomized block in a factorial combination with 4 row spacings 0.35, 0.45, 0.60, 0.75 m and 4 plant populations 150, 200, 250, 300 thousand plants per hectare and 4 replications. The temporal analysis of the epidemic was evaluated using mathematical models, such as Logistics, Monomolecular and Gompertz, in order to determine the best model that described the progress of the disease as a function of local meteorological elements. For the incidence data it has been shown that both logistic and monomolecular models were those that were best fitted to the experimental data. For severity, the best model related to the experimental data was the logistic one. Either for incidence or for severity, air temperature was considered to be the environmental factor most affecting the progress of the disease. The variability in the apparent infection rates of white mold on soybean was not affected by different row spacings and plant populations; therefore, suggesting that macroclimatic variations prevailed in such a fashion to mitigate the effect of cultural practices adopted in the field.

KEYWORDS

Meteorological Data, Sclerotinia sclerotiorum Lib. de Bary, Glycine max, Row Spacing, Plant Population, Epidemiology

Cite this paper

Beruski, G. , Pereira, A. , Jaccoud-Filho, D. , Sartori, F. and Sentelhas, P. 2016 Effects of Climate and Agricultural Practices on Temporal Progress of Sclerotinia sclerotiorum for Soybean in Brazil. Agricultural Sciences, 7, 425-438. doi: 10.4236-as.2016.77044.





Autor: Gustavo Castilho Beruski1, André Belmont Pereira2*, David Souza Jaccoud-Filho3, Felipe Fadel Sartori3, Paulo Cesar Sentelhas1

Fuente: http://www.scirp.org/



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