How to Manage Pests

UC Pest Management Guidelines

Dry Beans

Crop Rotation

(Reviewed 12/08, updated 12/08)

In this Guideline:

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
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)
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


[UC Peer Reviewed]

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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