Skip to Left navigation Skip to Main content Skip to Footer

University of Minnesota Extension

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

Print Icon Email Icon Share Icon

Butternut > Leaves > Leaves fall off prematurely

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

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
2 of 2
  • 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

Don't see what you're looking for?