PLATE 3 
Relation of soil temperature to the progress of Fmarium cepae. 
Upper row: Plants from White Portugal sets inoculated and planted as de¬ 
scribed for Plate 2, A, and held at various soil temperatures. Lower row: 
Plants from uninoculated bulbs held at the same temperatures. Photographed 
18 days after initiation of the experiment. The disease has not developed at 
19 ° C. nor at 14° C. At 24° the plants have recently wilted. At 28° and 32° 
the plants were killed rapidly before the tops had grown to any great extent. 
