File:Economic entomology for the farmer and fruit-grower - and for use as a text-book in agricultural schools and colleges (1906) (14755152316).jpg

Identifier: economicentomo00smit (find matches)
Title: Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges
Year: 1906 (1900s)
Authors: Smith, John Bernhard, 1858-1912
Subjects: Insect pests
Publisher: Philadelphia London : J.B. Lippincott company
Contributing Library: University of British Columbia Library
Digitizing Sponsor: University of British Columbia Library

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Text Appearing Before Image:
The sinuate pear-borer, Agrilus sitiuatus.—a, beetle; b, larva; c, its anal fork; d,pupal chamber with pupa in position. the top to prevent beetles getting under it, and must extendunderground an inch or so. In this way we not only preventnew infestation, but any beetles that may emerge from the trunkwill be hopelessly imprisoned and will die without a chance toreproduce. Instead of wire netting, tarred paper or even newspaperstightly wrapped around the trunk to the branches will answeran excellent purpose, needing renewal each year, however, wherethe wire netting lasts several seasons. Thorough whitewashing THE INSECT WORLD. 189 offers a large measure of protection, since the adults will not vol-untarily eat through a coat of it, and the larvae cannot do so Fig. 174.
Text Appearing After Image:
Work of the sinuate pear-borer on a Bartlett pear-tree; about one-fourth natural size. when first they emerge from the &%g. The whitewash can be T90 A,V ECONOMIC ENTOMOLOGY. applied with a knapsack pump through a Vermorel nozzle, anda little Paris green adds greatly to its effectiveness. It shouldbe renewed every week or two until the middle of July, when thedanger from these flat-headed borers may be considered at anend, and it has the advantage of protecting the branches as wellas the trunk. The admixture of a little glue or salt will improveits adhesive and lasting qualities. A strong fish-oil soap, say one pound in one gallon of water,is also effecti\e and may be applied in the same manner. Itforms a film of soap over the bark, and is repellent to the beetlesas well as fatal to the young larvae. The admixture of an ounceof crude carbolic acid to a gallon of suds is advantageous. Thismixture should not be applied to leaves or on young shoots,as it would probably cause injury. A

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