Hello all, and much THANKS to those who responded. For Hans ... I have only a few Hippeastrums, not nearby and which appear healthy. I could see no obvious insects under a magnifying glass, but I know some can be microscopic. At the recommendation of a local nurseryman, my first approach it to treat with a product called Physan 20. It is labelled as an Algaecide, Fungicide, Bactericide and Virucide (!) with the following 2 active ingredients at 10% each: dimethyl benzyl ammonium chloride ethylbenzyl ammonium chloride Has anybody used and/or had successes with this product? Thanks again for all suggestions, Ken Blackford, San Diego --- On Sun, 10/16/11, Ken <kjblack@pacbell.net> wrote: I discovered some rot in the upper old leaf bases of this Brunsvigia josephinae. It bloomed in August and September this year ... and we had a freak heavy rainstorm then followed by warm weather ... which I suspect is responsible for this rot. Any suggestions on treatment? Sulphur? A fungicide? http://flickr.com/photos/amarguy/…