. Bulletin. Agriculture. 16 A SOFT ROT OF THE CALLA LILY. In a 24-houi-okl beef-hroth culture they about in width. In the same culture the length varies from 2/^ to Sm- The very short ones, as shown by the measurements, are round, or nearly so; these eventuall}^ elongate, becoming rods. After the organisms have elon- gated, cross walls are formed and as a rule they soon break in two, forming separate organisms; but occa- sionally they remain intact until a long chain is formed, which may finally l)reak up into individual cells (PI. II, fig. 1). This organism moves with a gliding
. Bulletin. Agriculture. 16 A SOFT ROT OF THE CALLA LILY. In a 24-houi-okl beef-hroth culture they about in width. In the same culture the length varies from 2/^ to Sm- The very short ones, as shown by the measurements, are round, or nearly so; these eventuall}^ elongate, becoming rods. After the organisms have elon- gated, cross walls are formed and as a rule they soon break in two, forming separate organisms; but occa- sionally they remain intact until a long chain is formed, which may finally l)reak up into individual cells (PI. II, fig. 1). This organism moves with a gliding motion, Ficx. b.—Bariiins and upou staiuiug for flagella it is found to possess geiiatTabouteoo. from two to eight wavy fiagella scattered over the sur- face of the body (PI. II. fig. 1). The fiagella vary in length from 4/^ to 18//, , two to six times the average length of the bodv. No spores belonging to this organism have been found in any of the artificial cultures or in the diseased plants. PHYSIOIiOGICAL CHARACTERS OF THE ORGANISM. Certain ph^-siological characters of the organism have been deter- mined by growing it on dilierent media and under various conditions of light, heat, etc., as described in the following pages. NUTRIENT MEDIA. In studying the physiology of this organism the following media have been used, viz, beef broth, agar, gelatin, Uschinsky's solution, Dunham's peptone solution, peptone water with rosolic acid, peptone water w\th methylene blue, simple peptone water," milk, litmus milk, indigo-carmine peptone, and egg albumen. All these culture media were carefully prepared. The beef-broth stock was made from lean beef, the chemicals were "c. p.," and only distilled water was used. In addition to these media the following vegetables and fruits were used, viz, potatoes, onions, turnips, celery, cucumbers, peppers (green fruits), pieplant, beets, radisJies, caulifiower, cabbage, eggplant, toma- toes, salsify, carrots, parsnips, apples,
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