Mar. 4, 1918 



Wilt Diseases of Okra 



533 



Table I. — Data of several species and strains of Verticillium and Acrostalagmus arranged 



for comparison 



For the reasons above set forth, it is evident that the genus Acro- 

 stalagmus must be united with the older genus Verticillium. In view 

 of this condition, the following forms, if not identical with V. albo- 

 atrum, must at least be regarded as belonging to the genus Verticillium : 

 .4. albus from ginseng-wilt disease, described by Van Hook (27) and 

 renamed A. panax by Rankin (20); A. vilmorinii Guegen, from the China 

 aster and the fruits of the cacao; and A. caulophagus Lawrence, the 

 cause of the bluestem disease of black raspberry. Of the remaining 

 12 imperfectly characterized and apparently saprophytic species of the 

 genus Acrostalagmus some are no doubt identical with species of 

 Verticillium, and are just as incompletely delineated. The ubiquitous 

 V. lateritium Berk., commonly present on decaying potatoes, is possibly 

 the same as V. innabariniitn (Corda) Reinke and Berthold. 



FUSARIUM VASINFECTUM AND VERTICILLIUM ALBO-ATRUM, CAUSES 

 OF THE WILT DISEASES OF OKRA 



FUSARIUM VASINFECTUM 



The species of Fusarium from okra- and cotton-wilt considered in this 

 work are regarded as identical with each other and with the species of 

 Fusarium isolated from "frenching" cotton by Atkinson (5) and named 

 by him "F. vasinjccium." The cross-inoculation work herein recorded 

 proves the casual relation of F. vasinfecium to the wilt disease of okra, 



