Diseases of sunflower at the area of sombor yugoslavia in the period 1982 1985
Forgic, G.; Sotin, M.; Tosev, M.
Savremena Poljoprivreda 34(1-2): 53-62
In this paper the results of an investigation of the occurrence and intensity of diseases of sunflower in large-plot trials with different hybrids are presented. The investigation was conducted in order to obtain data about their characteristics in the agro-ecological conditions of the AC "Sombor" area. The following diseases were observed in the trial: downy mildew (caused by Plasmopara halstedii), leaf spot (caused by Alternaria helianthi, Phoma macdonaldi, Septoria helianthi), white rot (caused by Sclerotinia sclerotiorum) Phomopsis spp., and wilted platns (caused by Scelorium bataticola). Depending on the intensity of disease occurrence, the economic effects of sunflower production (yield, oil content) waried from year to year. Each hybrid showed diffrent sensitivty to various parasites. After the appearance of Phomopsis spp., the AC "Sombor" introduced chemical treatment as a measure of control and managed to stabilize seed yields. The hybrids tested in 1984 were selected according to their resistance to Phomopsis spp. That trait of theirs was confirmed in the trials and commercial production in 1985.