Albugo candida - http://www.apsnet.org/online/Archive/2004/IW000035.asp
Photograph of flowers of a brassica covered with a spore mass of this species. |
White Rust - http://www.uoguelph.ca/~gbarron/MISC2006/march200.htm
Photograph of white rust (Albugo) infecting shepherd’s purse, with a photomicrograph showing the sporangiophore and sporangium. |