134 ILLINOIS STATE ACADEMY OF SCIENCE 



minor details that they may be regarded as synonymous. 

 A Septoria has never been reported on Sedum spectahilis 

 either in America or elsewhere. The spots on this host 

 are very similar to those on S. purpureum and the fungus 

 is probably identical with Septoria Sedi West. 



Sedwn spectabilis is supposedly of Japanese origin 

 while Sedtmi purpureum was introduced from Europe. 

 It would be of interest to attempt cross inoculation on 

 these two hosts. 



The spots while not numerous are large (5-10 mm.). 

 Sunken, circular in outline, black above and dark gre^^ 

 below. The very numerous black pycnidia may be seen 

 with the hand lens. They are somewhat more abundant 

 on the upper surface, but are distinctly amphigenous. 

 They measure 80-120 microns. The spores are 2 x 30-50 

 microns, but mostly between 35 and 45 microns. They 

 are septate, mostly straight and needle shaped. The 

 spores of Septoria Sedi on Sedum purpureum as repre- 

 sented by No. 3081 Fungi Columbiani range somewhat 

 smaller, the most common lengths being 25-35 microns. 

 The character of the spots, however, closely agrees with 

 those in Sedum spectahilis. 



It is suggested as a control measure that the plants be 

 cut down as early in the autumn as possible and that 

 the leaves be carefully raked from the beds. Both the 

 plants and fallen leaves should be completely burned. I 

 have found viable spores in the pycindia of the fallen 

 leaves as late as April 1st of the year following infection. 



SPINACH 



Blight, yeUows or mosaic (cause unknown). Spinach 

 plants having symptoms of the well-known blight of the 

 Virginia truck region w^ere received in November, 1921, 

 from Belleville, St. Clair County. Since spinach blight is 

 not knoAvn to occur in this state, specimens were sent to 

 Dr. J. A. McClintock, Georgia Experiment Station, who 

 has had a wide experience with this disease in Virginia. 

 He confirmed my diagnosis and stated that, so far as he 

 knew, this was the first report of the occurrence of the 

 disease west of Ohio. 



