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Feb 7, 2014 12:19 PM CST

Name: Maurice
Grey Highlands, Ontario (Zone 5a)

There was an article in the Daylily Journal about daylily rust. In it the researchers indicated that they kept their spores alive for testing by keeping them in a freezer at -112F.

I don't think that cold by itself will necessarily kill daylily rust spores.

EFFICACY OF FUNGICIDE TREATMENTS FOR CONTROL OF DAYLILY RUST in the Daylily Journal, Vol. 57, pages 53-59, 2002.

Maurice

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