Variability of Phomopsis populations in sunflower (Helianthus annuus L.)
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Various reports state that the sunflower disease, primarily caused by Diaporthe/Phomopsis helianthi Munt.-Cvet. et al., has a wide geographic distribution in Europe, USA, Argentina and Australia. Various Phomopsis isolates obtained during this investigation of the sunflower disease differed in conidial type (α, β, α and β). Phomopsis helianthi was the only isolate producing exclusively β-conidia and perithecia on debris (Diaporthe helianthi). The other Phomopsis isolates were saprobes on sunflower plants.
Keywords:sunflower diseases; Diaporthe/Phomopsis helianthi; population variability
Source:Helia, 2001, 24, 34, 69-76