ONION HEALTH MANAGEMENT & PRODUCTION
Figure 17. Onion Soil-borne Fungal Disease Symptoms (courtesy of Onion ipmPIPE Project). Table 17. Foliar and Bulb Fungal Diseases of Onion; illustrations in Appendix II. Common Name Scientific Name Anthracnose Colletotrichum coccodes Black mold Aspergillus niger Blue mold Penicillium species Botrytis diseases Botrytis species Cercospora leaf spot Cercospora duddiae Cladosporium Leaf blotch Cladosporium allii-cepae Diplodia stain Lasiodiplodia theobromae Downy mildew Peronospora destructor Mushy rot Rhizopus microsporus, R. stolonifer Phyllosticta leaf blight Phyllosticta allii Powdery mildew Leveillula taurica Purple blotch Alternaria porri Rust Puccinia allii Smudge Colletotrichum circinans Stemphylium leaf blight Stemphylium vesicarium Twister Glomerella cingulata
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