Abstract

CUELLAR ZAMBRANO, Carlos et al. Infection and development model of Puccinia striiformis f. sp. hordei Eriks in Guanajuato, Mexico. Rev. Mex. Cienc. Agríc [online]. 2015, vol.6, n.spe11, pp.2219-2224. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v0i11.801.

The barley stripe rust (Puccinia striiformis f. sp. Hordei) is one of the major diseases in El Bajio, because the crop is established at the watering cycle autumn-winter. Integrated management schemes do not have enough information to support the use of chemicals to control the disease. A simulation model was developed, it calculates the onset of infection and disease development, to have a tool to implement control measures in a better informed way. The study was conducted in the INIFAP-CEBAJ in Celaya, Guanajuato, during cycles autumn-winter 2010, 2011, 2012 and 2013, the severities of Apizaco, Alina, Armida and Esperanza genotypes were evaluated. The model calculates the infection, when the requirements of the pathogen are met (T ° <= 11 HR> = 80), with daily weather data, in addition to estimating the severity in terms of percentage of infected tissue. When comparing the estimates of the model with field data, high relationship was found, indicating that the model can be used reliably. The risk study conducted showed that, the conditions for rust infection occur at least ten days in February with a probability of 80%, a very high risk considering that most of the crops in El Bajio are in December.

Keywords : Puccinia striiformis; barley; simulation model; system dynamics.

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