July 23, I9I7 A Colletotrichum Leaf spot of Turnips i6i 



On the stems the spots are more elongated parallel with the long axis 

 of the stem. 



The fungus seems to differ morphologically from Colletotrichum bras- 

 sicae Schulz. and Sacc, especially as to shape and size of spores (PI. it,, A; 

 14). (The spores of C. brassicae are described as fusoid, slightly curved, 

 and 19 to 24/iin length.) But it seems best to refer it tentatively to 

 this species until a careful comparison of the two forms can be made.^ 



SUMMARY 



An apparently new leafspot of turnips has been found in various 

 localities of Georgia. 



The disease also attacks the stems and seed pods, but experiments 

 indicate that the fungus is not carried over in .the living seed. 



The fungus causing the disease is tentatively referred to Colletotrichum 

 brassicae Schulz. and Sacc. 



The spots are much smaller than the similarly shaped spots produced 

 by Cylindrosporium brassicae Fautr. and Roum., which has been very 

 abundant in this region during the past two years (PI. 13, B). Eoth 

 organisms are frequently found on the same plant. 



' Specimens of this fungus were submitted to Dr. P. A. Saccardo, ■who finds that the fungus is not identical 

 with ColletotTichuni brassicae. He considers it a new species, to which he gives, in a note received after 

 this article had been forwarded for publication, the following name and diagnosis: 



CoUetotrichum Higginscanum, species novae. Maculis amphigenis, crebris, subrotundis, 2-4 mm. diam. 

 paUide alutaceis, marginulo elevato, angusto virescenti-cinctis; acervulis punctiformibus, aegre visibilibus; 

 setuhs parcis filiformibus, fuiigineis, sursum pallidioribus, 1-2-septatis 45-70=3-6, rectusculis; conidiis 

 terete-fusoideis, 15-17=3-33, utrique obtusatis, pluriguttulatis, rectis, hyalinis; conidiophoris palibormifus, 

 parce septatis, 16-19=6, subhyalinis. 



Hab. in foliis adhec vivis Brassicae Rapac, Georgia, Am. bor. A Coll. Brassicae recedit, maculis, situ, 

 conidiis non curvis, etc. 



