Are you saying to yourself – Betsy Lamb has lost her mind, we don’t have chrysanthemums, yet? Both may be true. However, based on last year, if you have overwintered chrysanthemums in a garden, it is possible that you can have CWR in June. Go out and check them now.
Pest Alert information – including an updated fungicide list is available at https://nysipm.cornell.edu/agriculture/ornamental-crops/pest-alerts/chrysanthemum-white-rust/
Thanks to Margery Daughtrey for all her help.
I’ll send another reminder when you have chrysanthemums coming in. Remember that the fungicides are protectants, not curative.