[Inventory of Phytophthora infestans population and optimization of the performance of the computerized forecasting models. PhD thesis]
2005
Bimsteine, G.
The promotional work Inventory of Phytophthora infestans population and optimization of the performance of the datorized forecasting models of Gunita Bimsteine is elaborated at the Latvia University of Agriculture, Faculty of Agriculture, Department of Plant Biology and Protection and Research and Study farm Vecauce during 2000-2003.The aim of investigation: to use computer based Decision Support Systems for reduced number of fungicide treatments for potato late blight control, considering pathogen population structure and weather conditions in Latvia. Following tasks were appointed: (1) to evaluate results from adaptation trials of late blight prognosis model NegFry, (2) to clarify potato varieties degree of field resistance to late blight for using in potato late blight forecasting models, (3) to manage population inventory of P. infestans and determine formation frequency of oospores in Latvia. Novelty of investigation: epidemiology and changes of Phytophthora infestans population were investigated in Latvian agro-ecological and agro-technical conditions. AUDPC (Area under Disease Progress Curve) and apparent infection rate were used for characterization of potato late blight development. For the first time in Latvia formation of P. infestans oospores was established in the laboratory. The computer based prognosis model was used.
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