. Manual of fruit insects. t number of moltshas not been determined. They become full-grown in two orthree weeks, and are then about f inch in length. At thelast molt theylose their blackspots and assumea uniform greencolor tinged withyellow at theends. The larvathen descends tothe ground andspins a smoothoval brownish co-coon beneathleaves or othertrash; sometimesthe cocoons areattached to thestems or leaves some distance from the grourid. The larvatransforms to a brownish pupa within the cocoon and the fliesof the second brood emerge in late June or early July. Some-times there is a small th
. Manual of fruit insects. t number of moltshas not been determined. They become full-grown in two orthree weeks, and are then about f inch in length. At thelast molt theylose their blackspots and assumea uniform greencolor tinged withyellow at theends. The larvathen descends tothe ground andspins a smoothoval brownish co-coon beneathleaves or othertrash; sometimesthe cocoons areattached to thestems or leaves some distance from the grourid. The larvatransforms to a brownish pupa within the cocoon and the fliesof the second brood emerge in late June or early July. Some-times there is a small third brood. The winter is passed inthe cocoon, probably in the larval condition. Treatment. The larvae may be readily destroyed by an early applicationof either 1 pound Paris green or 4 pounds arsenate of lead in100 gallons of water. Later, when the fruit is near maturity,fresh hellebore should be used at the rate of 4 ounces in 2 or 3gallons of water or, as a dry application, 1 pound in 5 pounds offlour or air-slaked Fig. 304. — Full-grown currant worms. 344 FRUIT INSECTS The Green Currant WormGymnonychus appendiculatus Hartig This is the so-called native currant worm, but as it too wasdoubtless imported from Europe the name should be is widely distributed throughout the Northern states andCanada, and while sometimes destructive in the West, it rarelyattracts attention in the East. The adults are smaller than in the preceding species, and inboth sexes the body is black. The flies appear in the springjust as the leaves are unfolding, and the female inserts herwhitish eggs into the edge of the currant or gooseberry leafbetween the two outer layers. The egg swells considerablybefore hatching and produces a distinct blister-like elevationof the epidermis of the leaf. They hatch in about five days,and the young larvae feed singly on the edge of the leaf, not incolonies, as in the preceding species. The larvae are of a uni-form light green color and have blackis
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