File:Diseases of fruit and nut crops in the United States in 1922 (1923) (20968447515).jpg

Title: Diseases of fruit and nut crops in the United States in 1922
Identifier: diseasesoffruitn28adam (find matches)
Year: 1923 (1920s)
Authors: Adams, J. F. (James Fowler), 1888-; United States. Plant Disease Survey
Subjects: Fruit Diseases and pests United States; Nuts Diseases and pests United States
Publisher: (Washington, D. C. ) : Plant Disease Survey, Bureau of Plant Industry, United States Department of Agriculture
Contributing Library: U.S. Department of Agriculture, National Agricultural Library
Digitizing Sponsor: U.S. Department of Agriculture, National Agricultural Library

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332 PE.OH - Brown rot
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Fig, 4^. Estimated percentage loss from brown rot in 1922. Mature apothecia were reported February 28 in Georgia and April 12 in Delav/are. According to the results of studies made by ;7. K. Ezekiel^, "Under natural conditions apothecia may develop in the spring following inoculation," and cold is probably a factor influencing their production, which may be in- hibited, even if development has already begun, by burying the mummies belov/ the surface of the soil* V/ea the r relations Favor^ible temperature with rainy periods were conducive to the greater prevalence of blossom blight in the southern peach belt* IvIcClintock^ stated (August) that in Georgia the excessive rains were "especially conducive to the development of brovm rot, st.rting first with the blossoms, and continuing on the fruit in both the green and mature stages." Dunegan, however, reported that the lack of rain "was very favorable to the successful harvesting of such varieties as Hiley and Elberta, "in the Fort Valley district. Gardner said that the high temperatures in Jndinna v/ere favorable to the disease- In Illinois Tehon accounts for serious blossom blight by citing the moist spring weather, while fruit rot, on the other hand, was held in check by the dry hot summer. A v/et July in Maryland, Delaware, and New Jersey was very favorable for the fruit rot. In Earion County, Oregon, the disease "started up after a few August rains but was checked immediately by warm dry days which held through most of the pick- ing season," according to Barss-. The following report by Dunegan refers to the Fort Vdley district of Georgia: "Blossom blight was most prevalent during the period from March 2c to 30# <^ period of comparatively high tem^perature and humidity. A drop in temperature and decrease in humidity on March

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