327 
fungicides from being undertaken. It seems clear, however, that, 
whatever morphological and physiological differences may exist 
between the different strains, the results of the cross-inoculation 
experiments lend themselves to the one interpretation, viz., that 
the species of Fusarium under investigation is the cause of a wilt 
of carnations, Nigella, Delphinium and Cosmos. 
The control plants of the cross-inoculation experiments were 
kept under observation for some time, and it was noted that the 
majority remained healthy for a further period of four months. 
Several of the carnation plants adopted a rosette-like habit of 
growth, but it was not determined if this was due to the Fusarium. 
CONTROL MEASURES. 
vented growth of the Fusarium in culture. This disinfectant, 
therefore, might be usefully employed, but, as has been indicated, 
‘oftener along the lines of selection and breeding of resistant or 
immune varieties than along those which lead to the use of 
chemical fungicides. 
Nore on Sclerotium Lolfsi, Sace. 
The occurrence of mycelium and sclerotia of Sclerotvum 
Rolfsii, Sace. on a single wilted carnation plant has already been 
noted. The mycelium was white in colour and the crystals asso- 
Pure cultures of this fungus were easily prepared by transfer- 
ring sclerotia to decoctions of sugar-cane in petri-dis 
of hyphae dotted with sclerotia in various stages of development. 
The sclerotia in culture and in nature are more OF less spherical, 
but may be ovoid; they change colour during growth from pale to 
dark-brown, and they resemble mustard seed in size. The 
