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False rust of winged bean (orange gall)

Small bright orange yellow raised galls cover the leaves, stems and pods, which twist and curl when badly hit.

Synchytrium psophocarpi Fungus Fact sheet
False rust of winged bean (Synchytrium psophocarpi): orange galls along a stem
Photo: Jie Hao Ou, CC BY, via iNaturalist

Crops it strikes

What you see

Spots or streaksCurled or mottled leaves

When to act

In cool, wet weather check young shoots, leaves and pods twice a week for raised orange galls. Pick and burn galled parts as soon as they show.

Before you spray

No spray is proven against it. Plant tolerant varieties, pick off galled parts, space the vines for air and save seed only from clean plants.

How to prevent it

  • Plant a tolerant variety, and save seed only from clean, healthy plants.
  • Trellis and space the vines so air moves and the leaves dry quickly.
  • Avoid shady, damp corners of the farm for winged bean.
  • Pick off galled shoots and pods early, and burn the old vines after the last harvest.
  • Do not plant a new crop beside an old infected one, and rotate the patch with other crops.

Where this comes from

Not sure it is this one?

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