September, 1955 ForsBerG: FusariuM DISEASE oF GLADIOLUS 475 
The pH curves for these two isolates are reached the alkaline range ahead of iso- 
quite similar. Isolate 45-73 remained in late 46-3. After 30 days, the pH curves of 
the low acid range a little longer but these two isolates were nearly identical. 
~ 
O 10 20 30 40 50 60 
TIME IN DAYS 
Fig. 15.—Progressive changes in pH produced in Tochinai liquid by four vascular isolates 
of Fusarium. 
