Manuale dell'orto insetti . havebeen riportato come alimentazione sullato capi di hop. Amongwild piante, si nutrono di thefollowing: Crataegus, St. Johns-wort, hounds lingua, trifoglio bush,loco-erbaccia, tick, trifoglio e Japanplum. La farfalla ha un expanseof li pollici. Il surfaceof superiore delle ali è nerastra colorato con blu-grigio. Il hindwings sono vicino all'angolo di cerva una fila di macchie bluastre, in ilcentro del quale è una grande macchia di colore arancione che circonda un smallblack uno. Sul margine esterno sono presenti in quello maschio, enella donna due, piccola coda-simili processi. Il Sotto surfaceis grigio con t

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Manual of vegetable-garden insects . havebeen reported as feeding onthe heads of the hop. Amongwild plants, they feed on thefollowing: Crataegus, St. Johns-wort, hounds tongue, bush clover, loco-weed, tick trefoil, and Japanplum. The butterfly has an expanseof li inches. The upper surfaceof the wings is blackish tinted with blue-gray. The hindwings have near the hind angle a row of bluish spots, in thecenter of which is a large orange spot surrounding a smallblack one. On the outer margin there are in the male one, andin the female two, small tail-like processes. The under surfaceis gray with two blackish brown lines crossing each wing(Fig. 59). The butterflies are on the wing from May toSeptember in the North and March to November in theSouth. The eggs are small and pea-green in color. Wherethey are deposited and the time of incubation have not beendetermined. The caterpillars bore into the pods of peas andbeans and destroy the developing seeds. The full-growncaterpillar is green, about i inch in length, and slug-like in. Fig. 59. •— The gray hair-streakbutterfly (X U). PEA AND BEAN INSECTS 85 appearance. The chrysalis is iialved, and hangs freely, at-tached at the caudal end to a hutton of silk. The pupalperiod lasts from ten days to two weeks. In the Norththere are two, and in the South, three broods annually. If necessary, the caterpillars may readily be controlled byspraying with an arsenical. References Seudder, Butterflies of Eastern U. S., 2, pp. 850-855. 1889.U. S. Div. Ent. Bull. 33, pp. 101-102. 1902. The Green Clover Worm Plathypena scabra Fabrieius This insect is common throughout the eastern United Statesand Canada. Its favorite food plant is clover but occasionallythe caterpillars defoliate peas, beans and lima beans. Theyare also found on tickweed, soybeans, vetch and strawberry. The moths have an expanse of 1 to 1-j inches, the largerspecimens usually being males. The palpi form a ratherprominent snout. Yhen at rest, the wings are closely ap-pre

Parole chiave associate all'immagine

• bookcentury1900
• bookdecade1910
• bookpublishernewyo
• bookyear1918