. •=Occurrence, no data on loss -=fLess than ir- 19- leaf rust Fig. 48. Estimated losses from stem rust (lower figures) of rye, I92I. Indiana: Locally serious in vicinity of barber- ries. Noted in north- eastern counties. (Jackson). Minnesota; First reported about Jure 20 in Free- born County. Fairly heavy on late rye. In some localities the yield probably re- duced by as nuch as (Departji^nt of Plant Pathology). Nebraska: Stern rust was very general throughout the state on rye, but the infection v/as light. (Thiel, A. F. Cereal Courier 13; 20). (upper figures) leaf rust Lea
. •=Occurrence, no data on loss -=fLess than ir- 19- leaf rust Fig. 48. Estimated losses from stem rust (lower figures) of rye, I92I. Indiana: Locally serious in vicinity of barber- ries. Noted in north- eastern counties. (Jackson). Minnesota; First reported about Jure 20 in Free- born County. Fairly heavy on late rye. In some localities the yield probably re- duced by as nuch as (Departji^nt of Plant Pathology). Nebraska: Stern rust was very general throughout the state on rye, but the infection v/as light. (Thiel, A. F. Cereal Courier 13; 20). (upper figures) leaf rust Leaf rust caused by Puccinia dispersa Eriks. The leaf rust of rye apparently caused son© reduction in yield in several states during the past season, althoUjjh it was relatively unconnion. The distri- bution of the disease and the amount of danage done are indicated on the map given under stem rust (Fig. ) . The urediniospores of the leaf rust of rye overwinter commonly and readily so that there is almost alv/ays sufficient inocu- Ixxca to cause fairly general rust attacks, even in the northern rye-grovdng states, such as Michigan, V/isconsin, Minnesota, and the Dakotas. Hov;ever, the rust seldom does any real damage in the principal rye grovdng states on account of the early maturity of the crop. During the past year Clayton estimated that the yield was reduced in Ohio by 3%, McClintock estimated the same for Georgia, Kirby 2% in New York, and Fromme; 2% in Virginia. Aside from these states, hov/ever, the damage was insignificant. Recent ?/ork conducted by !/.ains throws new light on the life history of the leaf rust parasite. "Efforts to obtain an infection of the leaf rust on Anchusa indicate that there may be two races of the rye rust, one of v/hich may parasitize some other heteroecious host than Anchusa. An effort to determine this host will be ; (i.:ains, E. B. Cereal Courier 13: 6G. April 30, 1921.)
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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1920, bookyear1922
