Agriculture: Potato Pest Management Guidelines

Emergence Through Row Closure

This year-round IPM program covers the major pests of both commercial and seed potato production fields in California.

About Emergence Through Row Closure

What should you be doing during this time?

Monitor aphids weekly (Klamath Basin only). Keep records (example monitoring form PDF) and manage if needed according to the Pest Management Guidelines.

Watch for pests of foliage including:

Insects:

Diseases:

Note presence of pests or damage (example monitoring form PDF) and manage according the Pest Management Guidelines.

Monitor for tuberworm adults (Central and Southern California).

Apply insecticide if needed according to the Pest Management Guidelines.

Use hilling to shape beds that facilitate tuber coverage during tuber bulking.

Survey for weed emergence. Cultivate or apply postemergence herbicide as needed.

If white mold has been a problem in previous potato crops, apply fungicide at flowering according to the Pest Management Guidelines.

Consider fungicide application if there is a field history of pink rot, Pythium leak, or black dot.

Consider application of nematicides via chemigation based on degree day model of nematode lifecycle.

Irrigate as needed.

Apply fertilizer as needed according to soil and petiole tests. Avoid over- or under-fertilization (especially nitrogen).

Text Updated: 08/19