. Pig. 9^- Geographical distribution of Pov/a^-ry :.'dldev; of the rose caused by Sphaerotheca spp. in tlie li • S. as reported to tjie Plant Diseasi^ Survey. Indiana. Gardner; of Indiana, reports tbixt C- L. Eurkholder held the disease in check with Bordeaux mixture 2-4-5O (Fyrox) until August 1, at which tiirje spraying v/as discontinued. In Michigan "Grape Bust" a sulphur-tobacco mixture v;as used^ but without effect. Dates of earliest appearance: May 17, Oregon June 28, Connecticut June 27; Ohio August 20, Delaware. Rust caused by phragmidiun rosae-californicae Diet. V.'ashington
. Pig. 9^- Geographical distribution of Pov/a^-ry :.'dldev; of the rose caused by Sphaerotheca spp. in tlie li • S. as reported to tjie Plant Diseasi^ Survey. Indiana. Gardner; of Indiana, reports tbixt C- L. Eurkholder held the disease in check with Bordeaux mixture 2-4-5O (Fyrox) until August 1, at which tiirje spraying v/as discontinued. In Michigan "Grape Bust" a sulphur-tobacco mixture v;as used^ but without effect. Dates of earliest appearance: May 17, Oregon June 28, Connecticut June 27; Ohio August 20, Delaware. Rust caused by phragmidiun rosae-californicae Diet. V.'ashington, Oregon. (JSB) Rust caused by Phraynidium spp. Illinois - Eowev/hat general in distribution in state. V.'ashington - comriion throughout state. Oregon - western counties. California - throughout state Varietal susceptibility was noticed in Indiana where the disease was serious on wild rose (Rosa £etigera)'-vhich is comnionly grown in lav/ns throughout state. In California it vsras severe on Certain varieties (l^'adac] Abel Chatenay, /cnerican Beauty, Paul Ileyron, G'_neral K'cArthur, Killarney, Karie Henrietta, and Eainsborough Pink. In Oregon no varietal susceptibility was noticed, does net appear to be increasing greatly there.
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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1920, bookyear1922
