154 



Mycologia 



Pestalozzia Gossypii Hori sp. nov. ex S. Thuruda, in Byochu-gai 

 Zasshi (Journ. Plant Protection) 4^: 27-28. T. 6, iii, Alar., 

 1917. (Japanese.) 



Spot ochraceous-brown, about 16 mm. diam. with irregularly 

 zoned fuligineous margin ; acervuli punctate at the middle part of 

 the spot, first covered by epidermis, then erumpent, black, 212- 

 255 /X broad; conidiophores hyaline, 2-4 X 0.6-0.9 /i, ; conidia 

 clavate, thickened at the apex, gradually narrowed toward the 

 base, 5-celled, terminal and basal cells hyaline, 3 inner cells 

 fulvous, the middle cell most strongly darkened (18-27 X 4-8 jn) ; 

 setae 2-3, slightly swollen at the apex, hyaline, 6-16 X 1.6 ft. 



On leaves of Gossypium herhaceum. 



Type locality: Shidzuoka-ken (prefecture) Ogasa-gun Hiki- 

 mura, Dec. 10, 1916, S. Tsuruda. 



Japanese name of the disease: Somen no Hanmonbyo (Leaf- 

 blotch of cotton). 



The disease caused a little damage on the upland cotton in 

 the Shidzuoka prefecture during the wet harvest season of 1916 

 but has never been reported from any other cotton-growing sec- 

 tions of Japan or Chosen (Korea). It is very easily distinguished 

 from ordinary Hantenbyo " (Leaf -spot disease, caused by Cer- 

 cospora gossypina Cke.) by its reddish-bufTy -brown spots which, 

 in the latter species, present a grayish-brown portion less con- 

 spicuously dotted in the center with acervuli. 



The dimensions of the conidia, which are omitted in the original 



publication, were obtained by communication with the original 



author, Mr. Tsuruda, who, to our greatest regret, died a few days 



before the reply containing this information reached the writer 



of this review. 



Bureau of Plant Industry, 

 Washington, D. C. 



