Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . The codling moth, Carpocapsa pomonella.—a,apple cut to show borings of the larva ; b, placewhere the egg was laid and the larva started ;rf, pupa; e, larva ; _/, g, moths at rest and withwings spread ; h, head of larva ; z, THE INSECT 323 a scale of bark or in a little depression, and there S[-)in a cocoon,in which they remain unchanged during- the winter. The changeto the pupa takes place very early in spring, and the moths appearas already stated. It has be
Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . The codling moth, Carpocapsa pomonella.—a,apple cut to show borings of the larva ; b, placewhere the egg was laid and the larva started ;rf, pupa; e, larva ; _/, g, moths at rest and withwings spread ; h, head of larva ; z, THE INSECT 323 a scale of bark or in a little depression, and there S[-)in a cocoon,in which they remain unchanged during- the winter. The changeto the pupa takes place very early in spring, and the moths appearas already stated. It has been found that we are able to protectour trees by spraying them with one of the arsenites as soon asthe blossoms have all dropped and the fruit is well set. At thattime the young apples are upright, aftbrding a favorable oppor-tunity for lodging the poison in the calyx cup, and here it remainsuntil the larva makes its first and, if the spraying is properly done,its last meal. Under favorable circumstances a single spraying issufficient to prevent injury, but practically two sprayings are re-quired at intervals of about a week, and a third if rain interferesto shorten this period,—that is to say, one just as soon as theblossoms are all off, and the second about a week or, if theweather remains dry, at most, ten days thereafter. This is toallo
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1906
