The productivity of winter oilseed rape cultivars is limited by various pests and diseases. The aim of this study was to determine the differences in the susceptibility of Lithuanian-grown winter rape cultivars to main fungal diseases, their yield performance, and their response to the fungicide application. | Turkish Journal of Agriculture and Forestry Turk J Agric For (2013) 37: 699-710 © TÜBİTAK doi: Research Article Susceptibility of winter rape cultivars to fungal diseases and their response to fungicide application 1, 1 1 2 1 Irena BRAZAUSKIENĖ *, Eglė PETRAITIENĖ , Gintaras BRAZAUSKAS , Antanas RONIS Department of Plant Pathology and Protection, Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry, Kedainiai District, Lithuania 2 Laboratory of Genetics and Physiology, Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry, Kedainiai District, Lithuania Received: Accepted: Published Online: Printed: Abstract: The productivity of winter oilseed rape cultivars is limited by various pests and diseases. The aim of this study was to determine the differences in the susceptibility of Lithuanian-grown winter rape cultivars to main fungal diseases, their yield performance, and their response to the fungicide application. A 2-factorial field experiment was carried out at the Institute of Agriculture of the Lithuanian Research Centre for Agriculture and Forestry over 3 growing seasons (2007/08, 2008/09, and 2009/10). The influence of fungicide application and cultivar (15 cultivars during the first and second seasons, and 6 cultivars during the third season) on the incidence and severity of phoma stem canker, alternaria black spot, and sclerotinia stem rot, as well as on the seed yield and thousand-seed weight, was evaluated. Experimental findings indicated that the incidence and severity of fungal diseases varied considerably among the growing seasons. The incidence of basal phoma stem canker was significantly influenced by the cultivar during all 3 growing seasons; however, significant effect of the cultivar on the mean severity of basal canker was obtained only in 2009. Fungicide spray applications
