How to Manage Pests

Pests in Gardens and Landscapes

Seed piece decay—Fusarium spp. and Erwinia carotovora

The first signs of seed piece decay are reddish brown to black spots that slowly form depressions on the surfaces of cut seed pieces. Later these spots may become black and slimy from bacterial infections. Entire seed pieces will rot and fail to emerge if enough infections develop. Seed piece decay reduces stands, results in variable plant size, and may increase the incidence of blackleg.

Life cycle

Solutions

Plant only certified seed potatoes. Cut them when sprouts just begin to form and plant the seed pieces immediately. Plant when soil temperature is above 45° F.

For more information, see the Damping -off Diseases in the Garden Pest Note.

Reddish brown spots of seed piece decay
Reddish brown spots of seed piece decay

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2014 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   /PMG/GARDEN/VEGES/DISEASES/seedpiecedec.html revised: April 25, 2014. Contact webmaster.