How to Manage Pests

Pests in Gardens and Landscapes

Phytophthora crown and root rot—Phytophthora megasperma

Symptoms of Phytophthora are typical of many root diseases. Infected vines may be stunted, and foliage may be sparse and senesce prematurely as greater proportions of the root system became infected. Vines die rapidly and the inner part of the bark of the crown region appears darkened.

Solutions

Remove infected vines. Keep graft unions of vine trunks above the soil line to minimize contact with pathogen propagules. Avoid repeated and prolonged flooding of soil. If using sprinklers, position nozzles to avoid water runoff down trunks.

For more information, see the Phytophthora Root and Crown Rot Pest Note.

Stunting and discoloration of infected plant
Stunting and discoloration of infected plant

Darkened bark and wood tissues
Darkened bark and wood tissues


Statewide IPM Program, Agriculture and Natural Resources, University of California
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