2010-06-222010-06-221974https://hdl.handle.net/10365/9694The article discusses sunflower parental lines RHA271, RHA273 and RHA274 for production of downy mildew resistant hybrids. A description of this plant disease, the breeding history of these new three sunflower lines, their hybrid performance, their disease and agronomic characteristics and their increase and distribution of seed are given.North Dakota State UniversitySunflowerPlant diseases and disordersPlant breedingArticle