Insetti infestanti di fattoria, giardino e frutteto . Lavoro della signora di squash-bh-dâgreatly ridotto. (Dopo W.E. Britton.) il Borer di Squash-vine * In molte località la più grave peste di squash è thSquash-vine Borer, e anche se altri cucurbs sono a qualche ora feriti, sono relativamente esenti da attacchi se zucca o pompkinsare presenti. Le larve si annoiavano nei gambi, causando loro il marciume * Melitia satyriniformis Hbn. Famiglia Sesiidce.of Entomology, U. S. DIP. Agr. Vedere Circolare 38, Bureau 394 INSETTI PARASSITI DI FATTORIA, GIARDINO E FRUTTETO dove colpito, in modo che loro ]) reak fuori e la pianta wilts e dies.Th

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Insect pests of farm, garden and orchard . Work of the squash lady-bh-dâgreatly reduced. (After W.E. Britton.) The Squash-vine Borer * In many localities the most serious pest of squash is theSquash-vine Borer, and although other cucurbs are sometimesinjured, they are relatively free from attack if squash or pumpkinsare present. The larvae bore in the stems, causing them to rot * Melittia satyriniformis Hbn. Family Sesiidce.of Entomology, U. S. Dept. Agr. See Circular 38, Bureau 394 INSECT PESTS OF FARM, GARDEN AND ORCHARD where affected, so that they ])reak off and the plant wilts and dies.The presence of the borer is indicated by the coarse yellowishexcrement which it forces from its burrow and which is foundon the ground beneath, and by the sudden wilting of the leaves.Injury is most severe at the base of the vine, which graduallydecays, so that it is severed and the whole plant dies. A half-dozen or more larva? are often found in a single stem, and as manyas forty have been taken from one vine, the larva? attacking all. Fig. 285.âThe sciuush-vinc Ixjrcr (Mclillia satyrinifonuis Hbn.): a, malemoth; b, female with wings folded at rest; c, eggs shown on bit of stem;(/, full-grown larva in vine; c, jjiipa; /. jjiipal cellâall one-third largerthan natm-al size. (^After Chittenden, U. S. Dept. Agr.) parts of the vine and even the petioles and large ribs of theleaves when abundant. Injury is worst on Hubbard, marrow, cymlings and late varieties of squash. The adult is one of the clear-winged mot lis with a wing expanseof about 1| inches, the fore-wings being opaque, dark olive-green in color, with a metallic lustre and a fringe of brownishblack. The hind-wings are transpart^nt, witii a bluish reflection, and the veins and marginal fring(> black. The aljdomen is markedwith orange, or red, black and ]:)ronze, antl the legs are brightorange, with tarsi black with white bands. The species occursthroughout the States east of the Rockies and southward intoCentral and Sou

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• bookcentury1900
• bookdecade1910
• bookpublisheretcet
• bookyear1912