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Diseases of Sunflowers

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About 30 diseases of sunflowers have been recorded throughout the world; not all occur in Australia, and only six are of importance in Victoria... As the disease develops only the fibrous strands on the back of the head remain, and the seed-bearing face generally falls away under the weight of the seed... Charcoal rot - apparent after flowering; stems discoloured at base, very small sclerotia within pith..
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