. Farm friends and farm foes : a text-book of agricultural science . Agricultural pests; Beneficial insects; Insect pests. HEMIPTERA: THE TRUE BUGS 75 before. After living in this fourth stage for about a week, the insect molts for the fourth time, entering upon its fifth stage. It is now quite different in appearance, and is easily recognized as a full-grown nymph, — a condition analogous to the pupa state of butterflies and moths, in that it is the stage immediately preceding the adult. The wing pads are greatly enlarged, while the thorax is wid- ened and lengthened. The body is more rectang
. Farm friends and farm foes : a text-book of agricultural science . Agricultural pests; Beneficial insects; Insect pests. HEMIPTERA: THE TRUE BUGS 75 before. After living in this fourth stage for about a week, the insect molts for the fourth time, entering upon its fifth stage. It is now quite different in appearance, and is easily recognized as a full-grown nymph, — a condition analogous to the pupa state of butterflies and moths, in that it is the stage immediately preceding the adult. The wing pads are greatly enlarged, while the thorax is wid- ened and lengthened. The body is more rectangular and so isimilar to a mature bug that at a little distance it may readily be mistaken for the latter. The full-grown nymph lives in this fifth stage about nine days before the final molt, by which it matures into the adult Squash Bug. The Chinch Bug The Chinch Bug has a life history simDar to that of the Squash Bug, but it does much more damage because it at- tacks the great grain crops — com, wheat, oats, and simi- lar staples. The areas in which it occurs in greatest abundance are shown by the dots on the map below. It has been estimated that during the sixty years from 1850 to 1910 the losses due to this insect exceeded $300,000000. The full-grown Chinch Bugs pass the win- ter in the shelter of thick grass, fallen leaves, or other protection, and come forth in the spring. They then scatter to such grain crops as they can find. Here they lay their eggs, one bug often laying four or five hun- dred eggs. The young bugs soon hatch and chinch bug , . , 1 , . ,1 Magnified attack the gram plants by suckmg the sap through their pointed beaks. When- they are abundant, they actually hide much of the surface of the leaf or stalk, and of course kill the 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
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbenefic, bookyear1910
