. Injurious insects and the use of insecticides [microform] : a new descriptive manual on noxious insects, with methods for their repression . Fig. 125.—ImbricatedSnout-beetle. (Co?;i-siock.) EHUBARB CURCULIO. { concariis). The parerit beetle usually has aj^ellow appearance, due to a yel-lowish powder which covers itsbody. When this powder isrubbed off the insect is of a dull,grayish-brown color. The adulthibernates during the winter andappears early in the spring, laj^-ing its eggs in certain commonspecies of dock, as for example theyellow dock {Eumex crispus.) The eggs are
. Injurious insects and the use of insecticides [microform] : a new descriptive manual on noxious insects, with methods for their repression . Fig. 125.—ImbricatedSnout-beetle. (Co?;i-siock.) EHUBARB CURCULIO. { concariis). The parerit beetle usually has aj^ellow appearance, due to a yel-lowish powder which covers itsbody. When this powder isrubbed off the insect is of a dull,grayish-brown color. The adulthibernates during the winter andappears early in the spring, laj^-ing its eggs in certain commonspecies of dock, as for example theyellow dock {Eumex crispus.) The eggs are also deposited inthe stalks of the Rhubarb, but itis thought the insects are incapa-ble of development, except in thewild dock. The beetles, however,gnaw and tunnel holes in thestalks of the rhubarb, causing thesap to exude, and thus do muchinjury to the plant. Remedies. — H a n d -picking the beetles is the only known remedy. The wild dock, wherever abundant, should be dug up and Fig. 126.—Rhubarb Larva, h. Pupa. c. Beetle, slightly (Weed.) magnified. 150 INJURIOUS INSECTS. THE SQUASH. THE SQUASH-VINE BORER. {^gei-ia cuourhitae.) The squash-vine borer is the larva of a moth belonging to the samegenus as the Peach borer. The parent insect has an orange coloredbody ; the fore-wings are black or olive brown, and the hind onestransparent; the hind pair of legs are fringed with long orange-yellowand black hairs. The eggs are laid on the stems of the young plantsnear the roots of the cucumber, squash and melon, and the larvse onhatching, burrow into the stems, feeding upon their substance andcausing the plants to die. The full-grown borer measures about one incli in length, is whitishin color, with the head brown. Toward the close of summer the borers leave the upper part of theroot or the stem near the surface, construct rude cocoons or cells, com-posed of earth glued together with a gummy silk-like secretion andenter upon the pupal stage of life. The
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbenefic, bookyear1894
