A preliminary introduction to the study of entomologyTogether with a chapter on remedies, or methods that can be used in fighting injurious insects; insect enemies of the apple tree and its fruit, and the insect enemies of small grains . emale; g, forewing; h, hind wing.—[Riley.] may be said that the Wheat Straw-worm is two brooded—anexceptional character with this group of insects—the adults ofthe second brood being small, almost wholly wiugless, and there-fore, non-migratory, composed almost exclu-sively of females. These appear in earlyspring and deposit their eggs in the grow-ing wheat, pl
A preliminary introduction to the study of entomologyTogether with a chapter on remedies, or methods that can be used in fighting injurious insects; insect enemies of the apple tree and its fruit, and the insect enemies of small grains . emale; g, forewing; h, hind wing.—[Riley.] may be said that the Wheat Straw-worm is two brooded—anexceptional character with this group of insects—the adults ofthe second brood being small, almost wholly wiugless, and there-fore, non-migratory, composed almost exclu-sively of females. These appear in earlyspring and deposit their eggs in the grow-ing wheat, placing them, usually, in or nearthe embryo head. These produce wormswhich, in June, develop a brood (the first)composed wholly of females (so far asknown), which are robust, and providedwith fully developed wings, and, therefore,compose the migratory brood, and throughthem the insect is diffused over the deposit their eggs in or near the jointsof the straw, more frequently the secondbelow the head. The worms from thesereach maturity and pass to the pupal stagein fall to emerge in early spring as adults. REMEDIES. As this insect hibernates in the stubble,burning will be a remedy. Then, too, by rotating crops the. Fig. 20 .— Isosomagrande.—[After Riley.] 220 INSECT ENEMIES OP SMALL GRAINS, wingless spring brood will be prevented from depositing their The three following species, viz., the Laeger Wheat StrawWorm [Isosoma grande Riley), the Rye Straw Worm {^Iso-soma ehjmi French), and the Yellow-Legged Joint Worm{Eurytoma fulvipes Fitch) are claimed by Professor Webster tobe synonyms of the two species described above. Ant. [Formica shanffusii Mayer.) Occasionally ants are known to feed upon grain of differentkinds. The present species has been observed by ProfessorWebster to eat kernels of seed wheat that had not been suf-ficiently covered in sowing. Other species could undoubtedlybe added were their injuries of sufficient importance to warrantlooking them u
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1894
