Alternaria alternata (alternaria leaf spot )
Alternaria alternata
alternaria leaf spot
Alternaria alternata f.sp. fragariae Alternaria alternata f.sp. lycopersici Alternaria fasciculata Alternaria tenuis
Worldwide
AL, CA, FL, GA, IL, IA, LA, MI, MS, NY, OR, PA, SD, TN, TX
2025-09-08
fungus
Korea
Main: allium, pepper; Other: watermelon, sunflower, sorghum, spinach, marigold, many fruits and trees
ALTEAL
Alternaria alternata is a widespread fungus that can persist in soil and crop debris for many years, enabling it to infect plants across successive growing seasons. Its spores are dispersed by air, wind, water splash, irrigation, and contact with contaminated plant material. Numerous studies have demonstrated its transmission under experimental conditions, and it has been shown to be seed-transmitted in a few crops within the Malvaceae family.