Diseases of Beans and Peas

Root RotsFusarium solani

f. sp. phaseoli

f. sp. pisi

• Beans and peas, respectively

• Soilborne• Favored by wet or poorly

drained soils

• Avoid areas with a history of

disease • Crop rotation• Improve drainage• Use fungicide-treated seed

Root RotsRhizoctonia solani

• Beans and peas

• Soilborne• Favored by wet or poorly

drained soils

• Avoid areas with a history of

disease • Crop rotation• Improve drainage• Use fungicide-treated seed

Web BlightRhizoctonia solani

• Beans

• Soilborne• Favored by warm

temperatures, rain and

high humidity

Botrytis Blight (Gray

Mold)Botrytis cinerea

• Beans & English peas

• Soilborne• Windborne spores• Favored by cool (68-77F),

wet conditions

• Improve air circulation• Avoid excessive fertilization• Use fungicides during flowering

Southern Blight Sclerotium

rolfsii

• Beans

• Soilborne•Favored by warm, wet

conditions

• Deep plowing to bury

sclerotia• Crop rotation• Resistant varieties

White Mold (Watery Soft Rot)

Sclerotinia sclerotiorum

• Beans & English peas

• Soilborne• Windborne spores• Favored by cool (68-77F),

wet conditions

• Improve air circulation• Avoid excessive fertilization• Use fungicides during flowering

AnthracnoseColletotrichum lindemuthianum

Beans and southern peas

Primarily seedborne Can survive on infected

crop residues in soil Splash-dispersed

Resistant varieties Clean seed Fungicides Crop rotation (2 years

between susceptible crops)

Common Bacterial

Blight Xanthomonas campestris pv. phaseoli

• Beans and southern peas

• Seed-borne• Infected crop residue• Splashing water• Favored by warmer

temperatures & high humidity

• Clean seed• Resistant cultivars• Crop rotation• Copper fungicides (?)

Halo Blight Pseudomonas syringae pv. phaseolicola

• Seed-borne• Splashing water• Systemic in the plant• Favored by cool, wet

weather

5363914

5363916

• Clean seed• Resistant varieties• Copper fungicides

Beans

Bean RustUromyces

appendiculatus

• Beans

• Windborne • Favored by warm,

humid conditions

• Resistant varieties• Avoid excessive N• Sanitation• Fungicides

Resources

http://lsuagcenter.com/plantdiagnostics

http://www.ipmimages.org/

http://www.ipm.ucdavis.edu/

http://vegetablemdonline.ppath.cornell.edu

http://edis.ifas.ufl.edu/department_plant_pathology

http://laplantpath.wordpress.com

http://www.extension.org/

Resources

LSU AgCenter Plant Diagnostic Center

LSU AgCenter Soil Testing & Plant Analysis Lab