Insect pests of farm, garden and orchard . on low land and that previously in sweetpotatoes, and are always first noticed near fence rows or woodlandwhere the beetles have hibernated. The beetle is bronzed or *See Sanderson, Bulletin 59, Md. Agr. Exp. Sta.; J. B. Smith, Bulletin229, N. J. Agr. Exp. Sta. t Choetocnema confinis Lee. Family Chriisomelidoe. See Smith, 1. c., p. 4. 430 INSECTS INJURIOUS TO THE SWEET POTATO 431 brassy-brown, about one-sixteenth inch long, thick set, and thewing-covers when seen under a lens are deeply striated. Life History.—The beetles hibernate over winter in rubb
Insect pests of farm, garden and orchard . on low land and that previously in sweetpotatoes, and are always first noticed near fence rows or woodlandwhere the beetles have hibernated. The beetle is bronzed or *See Sanderson, Bulletin 59, Md. Agr. Exp. Sta.; J. B. Smith, Bulletin229, N. J. Agr. Exp. Sta. t Choetocnema confinis Lee. Family Chriisomelidoe. See Smith, 1. c., p. 4. 430 INSECTS INJURIOUS TO THE SWEET POTATO 431 brassy-brown, about one-sixteenth inch long, thick set, and thewing-covers when seen under a lens are deeply striated. Life History.—The beetles hibernate over winter in rubbish,under logs, leaves or other vegetation, and emerge early in mate as soon as they have fed a little, and disappear by themiddle of June in New Jersey. But little is known of the earlystages of the insect and they have never been found on sweet-potato plants. The larvae have been found, however, feeding onthe roots of bindweed. The larva (Fig. 308) is a slender, whitegrub, about one-eighth inch long, and feeds externally upon. Fig. 309.—Sweet-potato leaves injured by the sweet-potato flea-beetle. (After J. B. Smith.) the smaller roots. The beetles appear again in August, but donot as a rule feed on sweet potatoes, preferring bindweeds andwild morning-glories, from which they disappear in late By dipping the plants in arsenate of lead 1 pound to10 gallons of water, as they are being set, they will be protectedand any beetles feeding on them will be killed. The plants shouldbe allowed to dry slightly before being set. Dipping the plantsis much better than spraying them later, as it is practicallyimpossible to completely cover the plant by spraying, as may bedone in dipping, which is much quicker and less expensive. Late- 132 INSECT PESTS OF FARINI, GARDEN AND ORCHARD planted sweet potatoes are mueli less seriously injured, as thebeetles will seek out their wild food-plants and ))econie establishedupon theni, so that late planting may be resorted
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