VARIABILITY OF PATHOGEN INFECTION PHOMOPSIS HELIANTHI M. AND PLASMOPARA HALSTEDII B. SEEDS OF HELIANTHUS ANNUUS L. DOMESTIC AND FOREIGN SELECTION
Journal Title: Біоресурси і природокористування [Biological Resources and Nature Management] - Year 2018, Vol 10, Issue 1
Abstract
Fungal diseases Phomopsis helianthi M. and Plasmopara halstedii B. are among the most dangerous that are capable of destroying the entire crop of sunflower annual. The purpose of the study was to estimate the infection level of sunflower seeds of annual domestic and foreign breeding Phomopsis helianthi M. and Plasmopara halstedii B. Examination of the seed material was carried out during 2011–2015 on the basis of the Kherson Regional Phytosanitary Laboratory. The seeds of 96 varieties and hybrids of domestic selection from 6 regions of Ukraine and 136 varieties and hybrids of foreign selection from 10 countries, which were submitted for examination, are analyzed. Infection Plasmopara halstedii B. was detected in 20.0 % of samples of varieties and hybrids of domestic breeding, and 8.7% of Phomopsis helianthi M. Among the varieties and hybrids of foreign selection, Plasmopara halstedii B. infection was found in 13.7% Phomopsis helianthi M. – in 7.7% of the lots of seeds. The levels contamination analysis of seed material depends on the country of its origin is carried out. Measures were taken to counter the spread of Plasmopara halstedii B. not to the native race.
Authors and Affiliations
Ye. V. Syvoded, O. V. Rafalska
Keywords
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