The incidence and spreading of Macrophomina phaseolina (Tassi) Goidanovich on sunflower in the Czech Republic
2008
Veverka, K.,Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic). Odbor Rostlinolekarstvi | Palicova, J.,Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic). Odbor Rostlinolekarstvi | Krizkova, I.,Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic). Odbor Rostlinolekarstvi
The aim of our work was to study the incidence of charcoal disease caused by the pathogen Macrophomina phaseolina in the main sunflower growing regions in the Czech Republic between 2000-2007 and analyse the relationship between weather conditions and the occurrence of the pathogen. The incidence of the disease is increasing year by year indicating a spread of the pathogen. The warm and dry periods throughout the end of July and August have promoted the disease. However in some years where weather conditions were favourable for the pathogen no disease was found in some of the studied localities. It is assumed that the pathogen was not yet present in these localities. Soil conditions are critical. Diseased plants are usually distributed in several dispersed groups in the stand, especially on higher and drier parts of the field. They had poorly developed heads and seeds. Disease is also often found on plants suffering from compressed roots.
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