. Pig. 41* Estimated percentage loss from black rot in I922. Delaware: Leaf spotting most prevalent on Yellow Transparent. This is usually associated v/ith infected twigs where the fungus has over-wiiitered. (Adams) . Virginia; Chiefly fruit rot following arsenical inj-ury at calyx end, also some twig infection. (Fromme). West Virginia: About usual amount observed so far on fruit. Better spraying generally than last year, apparently reduced damage follov/ing worm injury, but considerable infection locally due to frost inj^ory at calyx. Leaf spot exceedingly heavy in som^e places, (Sherv/ood).
. Pig. 41* Estimated percentage loss from black rot in I922. Delaware: Leaf spotting most prevalent on Yellow Transparent. This is usually associated v/ith infected twigs where the fungus has over-wiiitered. (Adams) . Virginia; Chiefly fruit rot following arsenical inj-ury at calyx end, also some twig infection. (Fromme). West Virginia: About usual amount observed so far on fruit. Better spraying generally than last year, apparently reduced damage follov/ing worm injury, but considerable infection locally due to frost inj^ory at calyx. Leaf spot exceedingly heavy in som^e places, (Sherv/ood). Arkansas: The leaf spot form of this disease was more severe in Arkansas when I niadc observations in June than I have ever seen it any year in the fourteen years that I have been v.^rking on apple diseases. It v/as particularly severe on trees weakened by scale, (j. ). Ohio: The spore discharge of rot was noted to be coincident v/ith that of apple scab. Serio\.^ defoliation reported from south- ern Ohio. (Thomas). Indiana: In well kept young orchards canlcers are absent. Black rot occurred as a fruit rot following blotch on Northwestern Greening, Oldenburg (Butchess), and Ben Davis, and following scab.
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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1920, bookyear1923
