V. KRSTESKA, V. DIMESKA, S. STOJKOV and P. STOJANOSKI
University “St. Kliment Ohridski”, Bitola, Scientific Tobacco Institute, 7500 Prilep, Macedonia
KRSTESKA, V., V. DIMESKA, S. STOJKOV and P. STOJANOSKI, 2015. Peronospora tabacina A. the causing agent of blue mold disease on tobacco. Bulg. J. Agric. Sci., 21: 126–133
Blue mold is a disease of plants that is caused by Peronospora tabacina Adam (Family: Peronosporaceae) and can cause severe damage on tobacco crop. Due to the economical importance of PtA, a collaborative study of blue mold has been made in several countries through the world provided by CORESTA and AERET . Here, we present data on ten years monitoring (2003-2012) of the pathogenic effect and intensity of attack of the fungus (PtA) on different tobacco varieties from various countries and climate conditions and to estimate the degree of resistance tobacco varieties to the pathogenic fungus PtA. Also we investigated morphology and ecology of the pathogen PtA. Field trials with tobacco varieties were set up in randomized block with four replications at the experimental filed of Scientific Tobacco Institute - Prilep for realization of those investigations. Different tobacco varieties in Macedonia expressed various reactions to PtA. Up to now the overall analysis indicates that Chemical Mutant and Bel 61-10 are the most resistant varieties, followed by the flue cured variety V53 from Macedonia. In future, although the climatic changes are causing very dry periods, we must take concrete measures, integrated pest management program (fungicides, resistant cultivars) for escaping serious damage that can be caused on oriental tobacco plants grown in Macedonia.