Pacific Northwest Plant Disease Management Handbook

Boston Ivy (Parthenocissus tricuspidata)-Leaf Scorch

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Latest revision: 
March 2024
Image related to Boston Ivy (Parthenocissus tricuspidata)-Leaf Scorch
Vines on the left side are showing heat stress due to high temperatures and lack of water. Notice the leaves with necrotic edges.
Photo by Jay W. Pscheidt, 2002
Image related to Boston Ivy (Parthenocissus tricuspidata)-Leaf Scorch
It is common to find leaves with dark to black areas on the upper exposed side of the leaf. The lower middle leaf has the same discoloration on upper leaf surface but none on the lower leaf surface.
Photo by Jay W. Pscheidt, 2002

See:

Ivy (Hedera helix) - Leaf Scorch

Pscheidt, J.W., and Ocamb, C.M. (Senior Eds.). 2024 Pacific Northwest Plant Disease Management Handbook.
© Oregon State University.

Use pesticides safely!

  • Wear protective clothing and safety devices as recommended on the label. Bathe or shower after each use.
  • Read the pesticide label—even if you’ve used the pesticide before. Follow closely the instructions on the label (and any other directions you have).
  • Be cautious when you apply pesticides. Know your legal responsibility as a pesticide applicator. You may be liable for injury or damage resulting from pesticide use.

Trade-name products and services are mentioned as illustrations only. This does not mean that the participating Extension Services endorse these products and services or that they intend to discriminate against products and services not mentioned.

H - Home garden packaging commonly available.     O - Acceptable in organic production.