. Pig. 6. Estineted oercentage reduction in yield from It af rust of vfheat, 1919. • • H. S. Jackson, who is miaking-a special study of this rust at the Indiana Agricultural Experiment Station in' ration the Offi'^e of Cereal Inves- tigations, United States Department of Agri culture, has kindly furnished the following summary of the season's work bearing on varietal susceptibility. "We grew ten varieties jf durum wheat. a11 showed marked resist- ance to the leaf mst. One variety of Polish wheat showed but slight infection. Six-var ieties of emmer whirh were grown here showed
. Pig. 6. Estineted oercentage reduction in yield from It af rust of vfheat, 1919. • • H. S. Jackson, who is miaking-a special study of this rust at the Indiana Agricultural Experiment Station in' ration the Offi'^e of Cereal Inves- tigations, United States Department of Agri culture, has kindly furnished the following summary of the season's work bearing on varietal susceptibility. "We grew ten varieties jf durum wheat. a11 showed marked resist- ance to the leaf mst. One variety of Polish wheat showed but slight infection. Six-var ieties of emmer whirh were grown here showed ^consid- erable resistance, a variety of einkorn only slight flecking. Pour varieties of rivet and spelt shov/ed a higher degree of sus- ceptibility than the dirums but were not as susceptible as most of the common wheats. Fourteen-varieties of club v/heats also showed,heavy infection. Of aboit two hundred varieties, selections and hybrids of the common wheats, only about fifteen selections of four hybrids showed any resistance. All those showing any degree of resistance were of the Crimean group.
Size: 2763px × 1809px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1920, bookyear1920
