Alternaria gaisen
black spot of Japanese pear
Alternaria bokurai, Alternaria kikuchiana
Asia: China, Japan, Pakistan, South Korea, Taiwan; Europe: France, Hungary, Italy.
Not known to be in the US
2025-07-31
fungus
Brazil
Main: pear; Other: rice
ALTEKI
Alternaria gaisen spreads primarily through airborne conidia that are dispersed by wind and rain splash. The fungus can overwinter in fallen leaves or infected plant debris, serving as a source of new infections in the following growing season.
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