Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . ing leaves. Perhaps the best known of all belonging to this series is thepeach-borer, Sannina exitiosa. This is the pest of peach-growers all over the country, and the larvie live between bark andwood a little below thesurface of the ground ina mass of gum and woodymaterial. They firstmake their appearanceafter midsummer, andbecome about three-fourths of an inch longbefore winter sets in. Inspring they resume feed-ing, attaining a length ofa little more than an inch,then spin
Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . ing leaves. Perhaps the best known of all belonging to this series is thepeach-borer, Sannina exitiosa. This is the pest of peach-growers all over the country, and the larvie live between bark andwood a little below thesurface of the ground ina mass of gum and woodymaterial. They firstmake their appearanceafter midsummer, andbecome about three-fourths of an inch longbefore winter sets in. Inspring they resume feed-ing, attaining a length ofa little more than an inch,then spin a cocoon ofsilk and bits of chipscovered with gum, andchange to a pupa. Inthis stage they remain afew days and then emergeas moths. The sexes arevery unlike, the malesblack, with narrowly yel-Ijw-banded abdomen,and entirely transparent wings ; the females much larger, thefore-wings almost blackish brown and entirely covered with scales,the abdomen black, with a broad orange band at about themiddle. The eggs are laid on the bark near the surface of theground, and the larvae hatch after midsummer in time to do con-. ?fhe peach-borer, Sannina exitiosa; male above,female below ; both enlarged. 262 AN ECONOMIC ENTOMOLOGY. siderable feeding before winter arrives. Worming peach-trees, or cutting ont the larvae, is a recognized method of gettingrid of these insects, and has the advantage of being effective, ifthoroughly done. It has the disadvantage of gashing the trees,and sometimes causing a considerable amount of injury beforethe insect is found. If carelessly done a few will escape, andsooner or later the tree becomes girdled at the base, or soweakened that it proves attractive to bark-beetles, who completethe work begun by the borers. Our task is to keep the insectsout if possible, and the best method is to cover the bark withsome material upon which the insect cannot lay its eggs or throughwhich the young larvae cannot penetrate. On old trees white-lead paint in boiled linseed o
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1906
