Mycosphaerella brassicicola (cabbage ring spot )
Mycosphaerella brassicicola
cabbage ring spot
Asteroma brassicae, Asteromella brassicae, Cercospora albomaculans, Dothidea brassicae, Phyllosticta brassicicola, Phyllosticta napi, Pseudocercosporella anguioides, Sphaerella brassicicola, Sphaeria brassicicola., Depazea brassicicola
Africa: Ethiopia, Ghana, Kenya, Mrocco, Rwanda, South Africa, Tunisia, Uganda; Asia: Cambodia, China, India, Israel, Malaysia, Philippines, Sri Lanka, Turkey, Vietnam; Europeícenles: Belgium, Bulgaria, Denmark, Finland, France, Germany, Guernsey, Iceland, Ireland, Italy, Maltam Netherlands, Poland, Portugal, Sweden, UK; North America, Canada, Haiti, Jamaica, Mexico, Panama, Puerto Rico, Saint Lucia, Trinidad and Tobago, USA; Oceania: Australia, New Zealand, Norfolk Island; South America: Argentina, Brazil, Chile, Colombia, Ecuador, Guyana, Suriname, Uruguay, Venezuela.
AL, CA, HI, IL, OR, NY, TX, WA
2025-09-28
fungus
Mexico
Main: Brassicaceae family
MYCOBR
Mycosphaerella brassicicola is an ascomycete fungus that causes ringspot disease on Brassica crops, forming concentric leaf lesions that can lead to defoliation and reduced plant vigor. It survives between seasons on infected crop debris. The pathogen spreads primarily via airborne, wind-dispersed ascospores that infect leaves through stomata under cool, moist conditions, with local spread also possible via water splash. Some sources note seed infection but no references were listed and no reports were found that discuss seed transmission of this bacteria.