Diseases of Beans and Peas

Root Rots Fusarium 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 Rots Rhizoctonia 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 Blight Rhizoctonia 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

Anthracnose Colletotrichum 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 Clean seed Resistant varieties Copper fungicides Beans

Bean Rust Uromyces appendiculatus Beans Windborne Favored by warm, humid conditions Resistant varieties Avoid excessive N Sanitation Fungicides

Resources

Resources  LSU AgCenter Plant Diagnostic Center  LSU AgCenter Soil Testing & Plant Analysis Lab