. Class book of economic entomology [microform] : with special reference to the economic insects of the northern United States and Canada. Insect pests; Entomologie; Entomology; Insectes nuisibles, Lutte contre les; Insect pests; Insectes nuisibles. CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 121 /l</W/.-One-fitteenth inch long; head and thorax dark brown yellowish brown; antennae with 8 segments; 3 to 4 weeks for a generation; fore-wings with two, hind-wings with one longitudinal vein in 5 to 8 days; laid singly in leaf tissue; colorless and liian-shaped. Nymphs.—M
. Class book of economic entomology [microform] : with special reference to the economic insects of the northern United States and Canada. Insect pests; Entomologie; Entomology; Insectes nuisibles, Lutte contre les; Insect pests; Insectes nuisibles. CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 121 /l</W/.-One-fitteenth inch long; head and thorax dark brown yellowish brown; antennae with 8 segments; 3 to 4 weeks for a generation; fore-wings with two, hind-wings with one longitudinal vein in 5 to 8 days; laid singly in leaf tissue; colorless and liian-shaped. Nymphs.—Mature in 20 to 25 days. Onion Thrips or " While Blast" (Tkrips labaci Lind.).-Attacks a large variety of garden plants. Found on bulbs of onion in loose soil ami at axils of leaves. Punctures the tissues and sucks the sap giving the field a whitish appearance. Produces also scullions or thick tia. Ihrips {Eulhrips trilUi). Greatly enlarged. Ufle, Fohom.) ^l<i«//.—One-twenty-fifth inch long, active, slender, yellowish tinged with black, two pairs of bristly narrow wings which fold along the back Probably winters over in the rubbish on the ground; life-cycle about 3 weeks, hence several generations in a season. %i.—Laid singly in spring or early summer within the leaf tissue ,100 mch long, elongate and curved; hatch in about 4 days. .Vymffo.—Transparent at first, later greenish-yellow; mature in 'I "r 12 days. Control.—Spny with solution of nicotine sulphate and whale oil 5»ai, (4 oz., 4 lb., 40 gal.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lochhead, William, 1864-1927. Philadelphia : P. Blakiston's Son
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectentomology, bookyear1
