. Insect pests of farm, garden and orchard . ip, horseradish and cauliflower.* Control.—T\\h fact of the preference of the beetles for the wildfood-plants might be utilized by using them as a trap-crop, plantingthem, if necessary, as advised for the harlequin cabbage-bug(page 371), and then removing and destroying them as soon as thebeetles had oviposited, which would probably be about the middleof May in the latitude of Washington, D. C. Although no prac-tical experiments in its use seem to have been tried, a thoroughapplication of arsenate of lead at from 3 to 5 pounds to 50 gallonswould und
. Insect pests of farm, garden and orchard . ip, horseradish and cauliflower.* Control.—T\\h fact of the preference of the beetles for the wildfood-plants might be utilized by using them as a trap-crop, plantingthem, if necessary, as advised for the harlequin cabbage-bug(page 371), and then removing and destroying them as soon as thebeetles had oviposited, which would probably be about the middleof May in the latitude of Washington, D. C. Although no prac-tical experiments in its use seem to have been tried, a thoroughapplication of arsenate of lead at from 3 to 5 pounds to 50 gallonswould undoul)tedly destroy many of the beetles when they arefeeding on the foliage in early spring and after they emerge in June. * Quotations from Chittenden, CHAPTER XIX INSECTS INJURIOITS TO MELONS, CUCUMBERS, SQUASH, ETC.* The Striped Cucumber-beetle t Just as the httle cucumber and melon plants appear above thesoil they are attacked by hordes of hungry black-and-yellow-stripedbeetles, Avhich feed ravenously upon the succulent seed-leaves. Fig. 274.—The .striped cucumber beetle {Diabrolica vittata Fab.): a, beetle;b, larva; c, pupa; d, egg; e, sculpture of egg—a, b, c, much enlarged;d, more enlarged; e, highly magnified. (After Chittenden, U. S. D,Agr.) often killing them entirely so that reseeding is necessary. Thislittle striped beetle, often known as the striped-bug or melon-bug, is well known to all growers of cucurbs east of the RockyMountains, and also occurs in Washington. * See A. L. Quaintance, Bulletin 45, Geo. Agr. Exp. Sta.; J. B. Smith,Bulletin 94, N. J. Agr. Exp. ; R. I. Smith, Bulletins 205 and 214, Agr. Exp. Sta. t Diabrotica vittata Fab. Family Chrysomelidoe. See F. H. Chittenden,Circular 31, Bureau Ent., U. S. Dept. Agr.; T. J. Headlee, 20th Report N. Exp. Sta,, p. 499, 379 380 INSECT PESTS OF FARM, GARDEN AND ORCHARD The beetle is about two-fifths inch long and half as wide, of aIjright yellow color with a black head and three black
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