How to Manage Pests

Pests in Gardens and Landscapes

Seasonal development and life cycle—Bacterial soft rot

Bacterial soft rot and blackleg infections are favored by high soil moisture and high temperatures. The bacteria are carried in and on seed pieces, in soil, and in water. It can also be spread by insects and enter growth cracks or any injury. During and after harvest, soft rot is favored by immature tubers, adverse temperatures, mechanical damage, and free water on tuber surfaces.

Bacteria enters through cracks or wounds
Bacteria enters through cracks or wounds


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