ORIGINAL ARTICLE
Analysis of downy mildew infection of field pea varieties using the logistic model
 
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1
Department of Mathematical and Statistical Methods, Poznań University of Life Sciences Wojska Polskiego 28, 60-637 Poznań, Poland
2
Research Centre for Cultivar Testing in Słupia Wielka, Poland
CORRESPONDING AUTHOR
Ewa Bakinowska
Department of Mathematical and Statistical Methods, Poznań University of Life Sciences Wojska Polskiego 28, 60-637 Poznań, Poland
 
Journal of Plant Protection Research 2012;52(2):240–246
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ABSTRACT
The logistic model is commonly used for analysis of discrete, multinomial data. Such a model was used for the statistical evaluation of data concerning infection of field pea varieties by downy mildew, in two series of field trials. Each series consisted of experiments performed in locations spread over the whole of Poland in the time period from 2002 to 2005. Varieties cultivated on light soils were compared in the first series, and varieties cultivated on rich soils in the second. The most resistant varieties were identified (Sokolik – light soils, Terno – rich soils) and significant differences among varieties were detected. Estimators of model parameters were found using the Fisher scoring method implemented in logistic glm procedure of the SAS system.
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
 
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