File:The control of the codling moth in the Pecos Valley in New Mexico (1914) (14576534429).jpg

Identifier: controlofcodling88quai (find matches)
Title: The control of the codling moth in the Pecos Valley in New Mexico
Year: 1914 (1910s)
Authors: Quaintance, A. L. (Altus Lacy), 1870-1958
Subjects: Codling moth Control New Mexico Pecos River Valley Fruit Diseases and pests
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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orminess of all the apples produced on the five count treesthroughout the season; that is, the fruit which fell, the fruit whichwas picked from the trees in thinning, and that picked at harvest time. CONTROL OF THE CODLING MOTH IN NEW MEXICO. 5 It would appear that with the minimum of three applications,made as shown in Table I, injury from the codling moth in the PecosValley may be reduced to less than 5 per cent of the total crop ofapples produced. For each of the two additional applications anincrease in sound fruit is shown, but probably not in proportion tothe expense involved. It should be borne in mind, however, that inthese experiments applications were made with much thoroughness,and unless the orchardist will do equally as thorough work it will bebetter for him to make the additional applications. PLACES OF ENTRANCE OF FRUIT BY CODLING MOTH LARV^. Many observations in different parts of the country have shownthat the majority of codling moth larvse normahy enter the apple at
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Fig. 3.—Showing condition of calyx lobes of Ben Davis apple: a, Two days after falling of petals; b, tendays after falling of petals. (Original.) the calyx end. A careful study of the places of entering sprayedfruit by larvae, whether at calyx, side, or stem, throws much lighton the relative effectiveness of the respective spray applications.All experiments corroborate the statement that the treatment givenimmediately after the falling of the petals is by far the most im-portant one and that its omission can not be corrected by subsequenttreatments, however thoroughly made. A study of the behavior of the calyx lobes of the recently setapples in the Roswell section furnishes evidence of value in timingspray applications. Ordinarily in the East there is a period of about10 days following the dropping of apple blossoms during which the BULLETIN 88, U. S. DEPARTMENT OF AGRICULTURE. calyx lobes remain open, so that the spray may be successfullydirected into the calyx cups. In New Mexico,

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