Downy mildew and its control | Plamenjaca suncokreta i mere borbe
2009
Lacok, N., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia) | Radic, V., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia) | Tancic, S., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia) | Lecic, N., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia)
Sunflower (Helianthus annuus L.) is the most important oil crop in Serbia, that produces high quality oil for human consumption and technical purposes as well. Sunflower attacked by more than 40 different diseases. One of the most damaging diseases is downy mildew which is caused by Plasmopara halstedii fungus (syn. Plasmopara helianthi). As downy mildew occurred during the vegetation period of 2008, this research was designed to investigate the efficiency of fungicides, applied in case of secondary infection. We have measured oil and protein contents, germination and pathogen presence in seed of treated plants. Crops infected with Plasmopara helianthi and treated with Randomil, developed healthy seed with unchanged oil and protein contents in comparison with non-treated healthy crop. According to given results, we can confirm that, when secondary infection of downy mildew appears, treatment with fungicides are reliable. Following NS hybrids in Serbian commercial sunflower production that contain Pl-6 gene, conferring resistance to most important races of downy mildew are recommended: Sremac, Dusko, Plamen, Kazanova, Velja, and Rimi PR.
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