. Injurious insects : how to recognize and control them . Insect pests; Insect pests. ATTACKjyCr SVRFACE OF STALK OR 139. Fio. ll^s. — The Curoiilio. Slightly en- larged. Original. three fourths of an inch long. It may be controlled by hand picking. The normal place of breeding is in the stems of dock, and this weed should be removed from the neighborhood of rhubarb. The Hessian-fly [Mui/ctiola destructor Say) Few insects have wrought greater dam- age than this pest in its periods of abundance. It is one of the prime enemies of oiu' wheat-growing regions. The adult is a tiny, tw
. Injurious insects : how to recognize and control them . Insect pests; Insect pests. ATTACKjyCr SVRFACE OF STALK OR 139. Fio. ll^s. — The Curoiilio. Slightly en- larged. Original. three fourths of an inch long. It may be controlled by hand picking. The normal place of breeding is in the stems of dock, and this weed should be removed from the neighborhood of rhubarb. The Hessian-fly [Mui/ctiola destructor Say) Few insects have wrought greater dam- age than this pest in its periods of abundance. It is one of the prime enemies of oiu' wheat-growing regions. The adult is a tiny, two-winged gnat, one tenth of an inch long. It emerges in the fall, at the time that winter wheat is just imfolchug its leaves, and lays eggs on the upper surface of the leaves. The re- sulting maggot goes down to a point within the leaf sheath, feeds, and later transforms to a small, hard, brown object looking like a seed, and known as the "; In spring a new lot of adults emerge from these "flaxseeds," and at once lay eggs on the leaves of the yoimg wheat as be- fore. The maggots which hatch from these eggs feed at the Ixise of the leaf, caus- ing characteristic in- jury. An infested plant is stunted, shows no visible stem, and is darker than normal in color. If the infestation is se^-ere, the plant is seriously injtu-ed or entirely destroyed. The summer is piassed in the flaxseed stage, in the wheat 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 O'Kane, Walter Collins, b. 1877. New York : The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1912
