You're welcome Becky. Michele, in the Dong et al article the reference to nickel being previously effective is to Nickel Suppresses Daylily Rust, Puccinia Hemerocallidis on Susceptible Daylilies, Hemerocallis Spp. in Greenhouse and Field Trials by Reilly, Crawford and Buck. It's the one you posted the abstract for, and that's all there is to it, there's no full article available. There is a chart of daylily rust pustules per leaf of 'Mauna Loa' in response to nickel treatment in the book Mineral Nutrition and Plant Disease, Datnoff et al., APS Press, and this appears to be from Reilly et al, same study for which there's an abstract only. In this they only compared nickel treatment to propiconazole treatment.
So I looked on Google Scholar to see if I could find the article you're thinking of, might it be this one, although Crawford (Nickel Plus) isn't named on this one?:
http://www.ipni.net/ppiweb/pbr...
