Peach scab and its control

Description:

Identifier: peachscabitscont395keit (find matches)
Title: Peach scab and its control
Year: 1917 (1910s)
Authors: Keitt, G. W. (George Wannamaker), 1889-
Subjects: Peach Peach-scab
Publisher: Washington, D.C. : U.S. Dept. 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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the reduction in market value are both considered, itseems evident that a loss of 10 per cent of the total value of the peach crop in the easternUnited States is caused by peach scab. In order to supplement the data from published records and per-sonal observations, an inquiry concerning the economic importanceof the disease in the various States was included in the questionnairereferred to on the preceding page. The answers showed a consensusof opinion that, unless controlled, the disease may occasion seriouslosses in practically every important peach-producing State east ofthe Rocky Mountains. In formulating a more concrete conception of the economic impor-tance of the disease, it is of interest to refer to the estimates of thelatest census report2 from which the data in Table I are taken. 1 See estimates and notes by Mr. M. B. Waite, p. 45-46. 2 Thirteenth Census of the United States ... v. 5, Agriculture, 1909-10, p. 711, tab. 133, 1913. Bui. 395, U. S. Dept. of Agricultur Plate I
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AJHOEn&Co.Baltimore. Peach fruits, twigs, and leaf attacked by Cladosporium carpophilum. Figs 1 and 2.-Badly diseased Elberta fruits from Chevy Chase, Md., August 6, 1915 (about a weekbefore harvest). Fig 1 -Cracking of the diseased area. Fig. 2.-6lose proximity of twig lesionsto the infected area of the fruit. Figs. 3 and 4.-Early stages of infection on twigs of 1-year-oldJiarly Crawford trees from inoculation experiments at Madison, Wis., August 6 1915 Painted 40days after inoculation. Fig. o.-Typical natural infection on an Elberta twig from Chew ChaseMd., (September 16, 1915 Fig. 6.-Vell-developed lesions on an Elberta twig in the spring follow!16*1915° /-—Bad!y diseasedleaf of a Heath tree from Chevy Chase, Md , September Bui. 395, U. S. Dept. of Agriculture. Plate II.peachscabitscont395keit

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