. Injurious insects and the use of insecticides [microform] : a new descriptive manual on noxious insects, with methods for their repression . is green may be used alone at the rate of one pound of thepoison to 250 to 300 gallons of water. The first application should bemade in the spring, just as the buds are opening, and a second sprayingshould follow a week or ten days later, or before the blossoms not spray the trees when in bloom. THE FALL WEB-WORM. {Hyphantria. cunea.) This insect is widely distributed over the United States, being single brooded at the North; but in the Southern
. Injurious insects and the use of insecticides [microform] : a new descriptive manual on noxious insects, with methods for their repression . is green may be used alone at the rate of one pound of thepoison to 250 to 300 gallons of water. The first application should bemade in the spring, just as the buds are opening, and a second sprayingshould follow a week or ten days later, or before the blossoms not spray the trees when in bloom. THE FALL WEB-WORM. {Hyphantria. cunea.) This insect is widely distributed over the United States, being single brooded at the North; but in the Southern States there are two broods each year. The webs are conspicu-ous in late summer andearly autumn on apple,pear and cherry trees;indeed, the unsightlywebs of this pest arecommon on a large num-ber of fruit and shadetrees, and ornamentalplants. The adult is a prettysnow-white moth or miller. Sometimesthe front wings are spotted with black or dusky dots, but the general color of the mature moth is pure eggs are deposited on the under side of the leaves in May or June. The caterpillars are soon out and begin at once to spin a com-. FiG. 47.—The Fall 6. Pui)a. c. Adult moth, natural size. ORCHARD FRUITS. 65 mon web in which the colony lives, feeding upon the pulpy parts olthe leaves. When the leaves enclosed by the web are all eaten, othertwigs or branches are inclosed by extending the web. The young worms have black heads, are pale yellow in color, andare thinly covered with hair. The full-grown caterpillars are about aninch long, densely covered with long, slender, yellowish hairs, and areof a greenish-yellow color. The head and legs and a narrow strip alongthe middle of the back are black, and the under-sides are dusky brown. When full-grown they leave the web, descend to the ground, andburrow just beneath the surface, or find a retreat under refuse or litter,where they spin a light silken cocoon, and enter upon the pupal the South there are t
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbenefic, bookyear1894
