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Thesis (M.S.)--University of Nebraska--Lincoln, 1948. Department of Agronomy.


Copyright 1948, the author. Used by permission.


A brown to purplish-brown discoloration of floral and certain vegetative parts of the wheat plant has been observed by investigators for many years. McFadden (11) applied the term “brown necrosis” to this discoloration.

Results from two tests grown in replicated randomized blocks and one grown in a replicated systematic block at Lincoln, Nebraska showed that brown necrosis had no effect on grain yields of varieties and selections included. All material used was highly selected on the basis of desirable characters. Organisms on the glumes of winter wheat showing heavy expression of brown necrosis were Alternaria, Gibberella, Fusarium, bacteria and other unidentified organisms. However, no definite conclusion as to the cause of the brown necrosis could be made. A need for further investigation of this discoloration is apparent since the cause has not been established.

Advisor: Louis P. Reitz