. Bollettino dell'U.S. Dipartimento di Agricoltura. Agricoltura; l'agricoltura. Bollettino 0 di n. 156 Contributo da parte dell'Ufficio di presidenza di entomologia, L. O. Howard, Chie Gennaio 27, 1915. (Carta professionale.). Attaccare WIREWORMS cereali e colture foraggere. Da J. A. Hyslop, assistente entomologica, cereali e foraggio indagini di insetti. Introduzione. Wireworms sono le larve di numerosi tipi di hard-decorticati coleotteri appartenenti alla famiglia Elateridae. I coleotteri sono noti collo- quially come " Fare clic-coleotteri," " skip-jack," scatto coleotteri, ecc1 questi nomi sono tutti derivati dal

• Collaboratore: Book Worm / Alamy Foto Stock
• ID dell’immagine: RGCG89
• Dimensioni dei file: 7,1 MB (280,3 KB Download compresso)
• Liberatorie: Modello - no | Proprietà - no
• Dimensioni: 1305 x 1915 px | 22,1 x 32,4 cm | 8,7 x 12,8 inches | 150dpi

Altre informazioni

Questa foto è un'immagine di pubblico dominio, il che significa che il copyright è scaduto o che il titolare del copyright ha rinunciato a tale diritto. Alamy addebita un costo per l'accesso alla copia ad alta risoluzione dell'immagine.

Questa immagine potrebbe avere delle imperfezioni perché è storica o di reportage.

. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. BULLETIN 0 OF THE No. 156 Contribution from the Bureau of Entomology, L. O. Howard, Chie January 27, 1915. (PROFESSIONAL PAPER.). WIREWORMS ATTACKING CEREAL AND FORAGE CROPS. By J. A. Hyslop, Entomological Assistant, Cereal and Forage Insect Investigations. INTRODUCTION. Wireworms are the larvae of several kinds of hard-shelled beetles belonging to the family Elateridae. The beetles are known collo- quially as " click-beetles, " " skip-jacks, " snapping beetles, etc.1 These names are all derived from the beetles' unique habit of snap- ping the forepart of the body when placed upon their backs or held between the fingers. This habit is undoubtedly of use to the beetles in righting themselves when accidently overturned, and may also be a means of escape from their predatory natural enemies. Wireworms are elongate, more or less cylindrical, having a very highly chitinized cuticle, and measuring, according to the species, from one-half inch to over 3 inches in length. They have three, pairs of short legs near the anterior end of the bod}7. The color is usually yellow or reddish-brown. The cotton and corn wireworm is an exception to this description. The false wireworms (fig. 1, a) will also answer to the above description, but can easily be distinguished by their ability to move very rapidly and by the clavate last joint of the antennae; the true wireworms, though able to move rapidly in the soil, are not very agile when placed on the surface of the ground, and their antennae never have clavate terminal joints. The term "wireworm" is also, though erroneously, applied to these false wireworms, which are, however, the larvae of another group of beetles, the darkling beetles (Tenebrionidae). These beetles can not snap the forepart of the bod}7. One species of darkling beetle (Tenebrio molitor L., fig. 1, b) is common throughout the United States, and its larva, the meal-

Parole chiave associate all'immagine

• bookauth
• bookcentury1900
• bookdecade1910
• booksubjectagriculture