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How to Manage Pests
UC Pest Management Guidelines
Dry Beans
Crop Rotation
(Reviewed 12/08,
updated 12/08)
In this Guideline:
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Rotating to a nonhost crop can significantly reduce pest
populations in the field. The table below provides information on nonhost crops
that interrupt certain dry bean-associated pathogen, nematode, and weed cycles.
Although longer nonhost crop rotations are ideal, often they
are not economically feasible. A rotation of lesser duration is still
beneficial but to a lesser degree. In general, avoid leguminous crops as
rotation choices.
Use the table below to help
identify appropriate rotational crops to use in your field.
| Pest type |
Suggested rotation cycle (years) |
Nonhost crop options and other comments |
| DISEASES |
| charcoal rot (ashy stem blight) |
2-3 |
cereal crops |
| Fusarium root rot
(Fusarium solani f. sp. phaseoli: common, blackeye) |
3 |
Pathogen survives well without
bean hosts, so rotation will not solve problem entirely, but cereal crops are the best choice. |
| Fusarium wilt |
long term |
Any crop but the bean variety
that the species of Fusarium attacks. |
| Rhizoctonia solani |
3-4 |
Any crop other than bean. |
| Pythium spp. |
2-3 |
Small grains, as long as fully decomposed; summer fallow. |
| southern blight |
2 |
corn, small grains, safflower |
| white mold |
2-3 |
corn, small grains, safflower |
| NEMATODES—If your field has a history of
nematodes, destroy volunteer beans. Most common weeds are hosts and rotations should be weed free. |
| root knot nematode (M. javanica) |
2-3 |
resistant
tomato varieties;
winter small grains followed by fallow period during summer; oats; Acala cotton varieties |
| root knot nematode (M. incognita) |
2-3 |
resistant
tomato varieties;
winter small grains followed by fallow period during summer; oats; garlic,
onions; weed-free alfalfa; resistant large limas (White Ventura N, Maria) baby limas (Cariblanco N) and blackeyes (CB 46) |
| WEEDS |
| summer weeds |
1-2 |
corn, selective herbicides, and cultivations |
| winter weeds |
1-2 |
wheat or small grains and suitable herbicides |
| perennial weeds |
2-3 |
cereal crops, summer fallow, herbicides |
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UC IPM Pest Management Guidelines: Dry Beans
UC ANR Publication 3446
General Information
W. M. Canevari, UC Cooperative Extension, San Joaquin County
C. A. Frate, UC Cooperative Extension, Tulare County
L. D. Godfrey, Entomology, UC Davis
P. B. Goodell, UC IPM Program, Kearney Agricultural Research Center, Parlier
R. F. Long, UC Cooperative Extension, Yolo County
C. J. Mickler, UC Cooperative Extension, Stanislaus County
S. C. Mueller, UC Cooperative Extension, Fresno County
J. L. Schmierer, UC Cooperative Extension Colusa County
S. R. Temple, Plant Sciences,UC Davis
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