. Circular. Insects. 4 Tennessee.—Bedford, Blount, Cocke, Davidson, Gibson, Giles, Greene, H; blen, Hamilton, Hickman (?), Jefferson, Knox, Lawrence, McMinn, Mar' Monroe, Montgomery, Rutherford, Sevier, Stewart, Wayne, Williamson, Wile Texas.— El Paso (?). Virginia.— Brunswick, Halifax, Hanover, Prince George. GENERAL CONSIDERATIONS. The periodical cicada is so well kno that a general account of it in this plac< unnecessary. When it appears in gr< numbers it naturally causes considera' alarm and arouses fears for the safety shade trees and orchards. The acti damage, however, is usually s
. Circular. Insects. 4 Tennessee.—Bedford, Blount, Cocke, Davidson, Gibson, Giles, Greene, H; blen, Hamilton, Hickman (?), Jefferson, Knox, Lawrence, McMinn, Mar' Monroe, Montgomery, Rutherford, Sevier, Stewart, Wayne, Williamson, Wile Texas.— El Paso (?). Virginia.— Brunswick, Halifax, Hanover, Prince George. GENERAL CONSIDERATIONS. The periodical cicada is so well kno that a general account of it in this plac< unnecessary. When it appears in gr< numbers it naturally causes considera' alarm and arouses fears for the safety shade trees and orchards. The acti damage, however, is usually slight, exec in the case of newly planted orchards, a even here, by vigorous pruning back af the cicada has disappeared, much of t injury caused by the egg punctures (fig. can be obviated. Ordinary repellent substances, such kerosene emulsion or carbolic acid so] tions, seem to have very little effect in p; venting the oviposition of these insects. Some recent experience, however, indi- cates that trees thoroughly sprayed with Bordeaux mixture or a lime wash are apt to be avoided by the cicada, especially if there are other trees or woods in the nei borhood on which they can oviposit. r most reliable means of protecting nurse and young orchards is by collecting i insects in bags or umbrellas from the ti in early morning or late evening, wl they are somewhat torpid. Such eola- tions should be undertaken at the f appearance of the cicada and repea each day. It is hoped that everyone who recei this circular will keep a sharp lookout for swarms of this brood of cic and assist the Bureau in fixing its range accurately by sending expl Fig. 3.—Egg punctures of the periodical cicada: a, twig showing recent punc- tures, from front and side, and illus- trating manner of breaking; 6, twig showing older punctures, with re- traction of bark and more fully dis- playing the arrangement of fibers. Natural size (after Riley). Approved: James Wilson, Secretary of Agriculture
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectinsects
