Feb 22, 2016
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/plantdiagnosticshttp://www.ipmimages.org/http://www.ipm.ucdavis.edu/http://vegetablemdonline.ppath.cornell.eduhttp://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