Papers on the cotton boll weevil and related and associated insects . wards first publishednotice in 1896, which reads as follows: There is but one borer in the stalks of cotton, and that is the long-horned beetleknown as Ataxia, crypta (Say). It is occasionally mistaken for an enemy of theplant, but investigation has shown that it lays its eggs upon, and its larva? bore into,only such stalks as have been damaged by some other cause, such as rust. It followsinjury to the plant rather than causes it. The rather o-eneral occurrence of this insect at Yoakum. Tex., in1905 has made it seem advisabl
Papers on the cotton boll weevil and related and associated insects . wards first publishednotice in 1896, which reads as follows: There is but one borer in the stalks of cotton, and that is the long-horned beetleknown as Ataxia, crypta (Say). It is occasionally mistaken for an enemy of theplant, but investigation has shown that it lays its eggs upon, and its larva? bore into,only such stalks as have been damaged by some other cause, such as rust. It followsinjury to the plant rather than causes it. The rather o-eneral occurrence of this insect at Yoakum. Tex., in1905 has made it seem advisable to publish this more extended fields were examined in this locality, and showed that from5 to 10 per cent of the stalks were infested by this insect. One fieldhad 20 to 25 per cent of its stalks injured by the borer. It is to beregretted that the discovery of this infested locality was not madeearlier in the season, so that a more conclusive study could have beenmade. Bui. 63, Part VII, Bureau of Entomology, U. S. Dept. o< Agriculture Plate III. The Cotton Stalk-borer (Ataxia crypta). Fig. 1.—Adult or beetle. Fig. 2.—a, Galleries; b, work. Fig. 3.—Emergence holes of A.—a, Larva in situ; b, pupa in situ. Fig. 5.—o, Gallery running into root of plant: 6,castings behind larva. Fig. 1 twice natural size; figs. 2-5 two-thirds natural size. (Original.) THE COTTON STALK-BORER. (35 As has been staled by Doctor Howard, it is the larva of the borerthat works in the cotton stalk. It confines its attack to the pith of theplant. The amount of injury depends upon the size of the plant andthe number of borers. The writer found one plant about 3 feet highat Yoakum which contained eight larvae, and which showed fouremergence holes. The twelve borers had eaten out all the pith fromthe smallest branches to 3 inches below the surface of the ground inthe tap-root. The small twigs were only thin shells and crumpled likepaper between the fingers. Nearly all i
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