Class Book of Economic Entomology; With Special Reference to the Economic Insects of the Northern United States and Canada (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 Excerpt: ...formed in early spring in the silken tube. Greenhouse Leaf Tyer (Phlyctania ferrugalis Hbn.).--A serious pest in greenhouses to violet, rose, carnation, and other plants; and outdoors to beet, celery, lettuce, sweet pea and other plants. It ties up contiguous leaves by webs and feeds within, skeletonizing the leaves. Widely distributed. Adult.---A small moth, % inch wing expanse; fore wings light brown and with blackish cross lines; hind wings grey with darker margins. Eggs.--Translucent, oval disks, JJ2 mcn long, laid m clusters of 8 to 12; hatch in 19-20 days. Larva.--Three-fourths inch when full grown; greenish white with a green line down the back and another on either side; head straw colored; mottled. Full grown in 3-5 weeks; feeds mostly at night. Pupa.--Formed within the webbed leaves. Control.--Spray or dip the plants in solution of arsenate of lead as soon as larvae are observed; hand pick infested leaves. Crambide (close-wings) Root or Sod Web Worms (Ctambus spp.).--In July and August many small greyish moths with closely folded wings and with projecting mouth-parts (labial palpi) are common on grass lands and collect in large numbers about lights. The caterpillars of these moths live in the sod in silk-lined burrows among the roots of the grass, feeding upon them. Corn is sometimes injured. Adults.--Several species; yellowish-white wings with silver stripes, bands, gold lines and other markings. Two broods. June-July. Eggs---Laid in grass land in June-July and again Sept.-Oct.; oval, yellowish, ridged, 200 by each female; hatch in 6-10 days. Larva.--Color varying from yellowish-white to pink to reddish; surface tubercled with tufts of bristly hairs; form loose silken webs and feed on the roots; full grown in 5 to 7 weeks; % to % inch long. Hiber...