date:Sep 14, 2022
jections, which are fungal spore producing structures (PHOTO), can be seen on the lower leaf surface just below the spots. The spores produced in leaf spots on apple and crab apple trees do not reinfect apple trees. Rather, these spores are carried by wind and infect junipers.
Japanese apple rust has not yet been observed on junipers in Minnesota. Infected junipers have small woody galls that produce a bright orange gelatinous fungal mass during spring rains. Spores produced in juniper galls ar