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Sunflower Rust

In-Depth Downloads

ID

  • Brown pustules appear on the underside of the leaves.
    Photo: Sunflower rust lesions.
    Photo: Sunflower rust lesions.

Facts

  • Most economically damaging rust of sunflower in North America.
    Photo: Sunflower rust lesions.
  • Light dew and warm temperatures accelerate development.
  • Latin name: Puccinia helianthi.

Management

  • Plant resistant hybrids.
  • Apply a fungicide prior to bud stage if infection is found on more than 1% of the upper leaves.
    Photo: Sunflower rust - later stage.
    Photo courtesy of North Dakota State Univ. Extension Entomology - T. Gulya.