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How to Manage Pests
UC Pest Management Guidelines
Potato
Crop Rotation
(Reviewed 1/08,
updated 5/08)
In this Guideline:
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Avoid planting potatoes in the same field year
after year. Proper crop rotations enhance soil fertility, help maintain soil
structure, reduce certain pest problems, increase soil organic matter, and
conserve soil moisture. Herbicides not available for use in potatoes can be
used in certain rotation crops to control problem weeds. Whenever possible, use
rotations that reduce problem pests and avoid rotations that may increase them.
If your field is infested with pathogens or nematodes
listed in the table below, consider choosing a listed nonhost crop. Although
longer nonhost crop rotations are ideal, they often are not economically
feasible. A rotation of lesser duration is still beneficial but to a lesser
degree. In general, avoid solanaceous crops as rotation choices. Control
volunteer potatoes and weeds in the rotation crop.
For winter annual weed control, choose a small grain crop
and control these weeds with a suitable herbicide. Manage summer annual weeds
by growing a small grain (Klamath Basin) or using corn as a rotation crop so
that selective herbicides and cultivations can be used.
| Pest problem |
Rotation cycle (years) |
Rotation crop options and other comments |
| Diseases |
| Bacterial ring rot |
1 + |
Nonpotato crop; control volunteer potatoes |
| Black dot |
3 + |
Nonsolanaceous crop; control solanaceous weeds and volunteer potatoes |
| Common scab |
1 + |
Cereals; green manure cover crops such as rye, millet, and oats |
| Late blight |
1 + |
Nonsolanaceous crop; control solanaceous weeds and volunteer potatoes |
| Powdery scab |
3 + |
Nonsolanaceous crop; control solanaceous weeds and volunteer potatoes |
| Silver scurf |
1 + |
Nonsolanaceous crop; control solanaceous weeds and volunteer potatoes |
| Stem and stolon canker |
2–3 |
Nonpotato crop but not sugarbeet; control potato volunteers |
| Stem rot |
3 |
Small grains |
| Verticillium wilt |
2–3 |
Cereals, grasses, legumes; control weeds |
| White mold |
1 + |
Cereals, grasses; control weeds |
| Other Pests |
| Wireworms |
3 + |
Alfalfa; control weeds |
| Columbia root knot nematode |
1 + |
Alfalfa (for race 1), sugarbeet |
| Northern root knot nematode |
1 + |
Small grains |
| Southern root knot nematode |
1 + |
Nematode-resistant tomato cultivars |
| Weeds |
1 + |
Control problem weeds |
![[UC Peer Reviewed]](/IMAGES/logo-ucpeerreviewed.jpg)
UC IPM Pest Management Guidelines: Potato
UC ANR Publication 3463
General Information
B. J. Aegerter, UC Cooperative Extension, San Joaquin Co.
H. Carlson, UC Cooperative Extension, Siskiyou Co.
R. M. Davis, Plant Pathology, UC Davis
L. D. Godfrey, Entomology, UC Davis
D. R. Haviland, UC Cooperative Extension, Kern Co.
J. Nuñez, UC Cooperative Extension, Kern Co.
A. Shrestha, UC IPM Program/Kearney Agricultural Center, Parlier
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