The Helminthosporium Foot-rot of Wheat, with Observations on the Occurrence of Saltation in the Genus

One purpose of the present paper is to present the evidence on which the foregoing conclusion is based and certain facts concerning the morphology and parasitism of the fungus; but far transcending in interest the disease itself- which now appears to be one of much less alarming nature than was at first feared- is the fact that very striking phenomena of variability are found in this and related fungi. In the following pages, therefore, appear (I) an account of the Illinois foot-rot of wheat and its causal fungus; and (II) evidence and discussion of the occurrence of saltation within the genus Helminthosporium.