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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Butternut > Leaves fall off prematurely

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Butternut > Leaves > Leaves fall off prematurely

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  • Image: Anthracnose 1
  • Image: Anthracnose 2
  • Image: Anthracnose 3

Anthracnose
Gnomonia leptosyla

  • Leaflets have circular brown spots surrounded by yellow tissue
  • Infected leaves turn yellow, then brown on the margins, curl and eventually fall off
  • Dark brown to black spots or blotches form on nut husks
  • Nuts drop prematurely
  • More information on Walnut Anthracnose
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  • Image: Leaf spot 1
  • Image: Leaf spot 2
  • Image: Leaf spot 3

Leaf spot
Mycosphaerella juglandis

  • Small black spots scattered across leaf
  • Dark brown veins and leaf tips are common due to many spots forming on leaf veins and leaf tips
  • As the disease progresses, leaves yellow and fall off
  • In mid-summer leaves appear yellow from a distance
  • Occurs on black walnut and butternut
  • More information on Leaf spot

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