Cespedes-Sanchez, M. C., Naegele, R. P" Kousik, C. S., and Hausbeck, M. K. 2015, Field response of cucurbit hosts to Pseudoperonospora cubensis in Michigan. Plant Dis, 99:676-682. Downy mildew, caused by Pseudoperonospora cubensis, is a severe fo liar disease of many cucurbit crops worldwide. Forty-one cucurbit cultigens (commercial cultivars and plant introductions) from five genera (■ Cucumis, Citrullus, Cucurbita, Lagenaria, and Lujfa) were assessed for susceptibility to P. cubensis in a research field exposed to natural in oculum in Michigan. Eight cultigens from a differential set for pathotype determination were included within the 41 cultigens to detect changes in dominant P. cubensis pathotypes present. No pathotype differences were found between 2010 and 2011. Cucumis melo cultigen MR-1 was less susceptible to Michigan P. cubensis populations than other C. melo cul tigens. No symptoms or signs of infection were detected on cultigens of Cucurbita moschata and C. pepo.