A DEKALB technical agronomist, based in northeast Iowa, says tar spot has been slow to develop in her area, but conditions are changing.
Nicole Stecklein says farmers have been proactive with their fungicide treatments, but protections are starting to wear out. “While we had those cool wet environmental conditions, you know, we were having those spores in the lower canopy get up on that upper canopy and it was starting to spread,” she says.
