. Annual report - Entomological Society of Ontario. Entomological Society of Ontario; Insect pests; Insects. Fig. 63. Fie. 62. One of our allied beetles, Colaspis flavida, Say., feeds also in the larval state upon the root- lets of the strawberry. Fig. 62 represents the larva, Fig. 63 the mature insect. We now come to the extensive genus Chry- somela (golden apples), which contains our largest beetles of this family. The most generally known, as well as the most generally hated of these is C. decem-Uneata, Say, the ten-lined chrysomela, or as it is more commonly called the Colorado potato beet
. Annual report - Entomological Society of Ontario. Entomological Society of Ontario; Insect pests; Insects. Fig. 63. Fie. 62. One of our allied beetles, Colaspis flavida, Say., feeds also in the larval state upon the root- lets of the strawberry. Fig. 62 represents the larva, Fig. 63 the mature insect. We now come to the extensive genus Chry- somela (golden apples), which contains our largest beetles of this family. The most generally known, as well as the most generally hated of these is C. decem-Uneata, Say, the ten-lined chrysomela, or as it is more commonly called the Colorado potato beetle. This insect has already been described and frequently mentioned in our Reports, and its appearance and habits are so well known to all agriculturists that only a very brief account of it must be given here. Over sixty years ago, in 1819 or 1820, it was discovered by Say along the Upper Missouri, near the base of the Rocky Mountains, where it fed upon Solanum rostratum, a wild plant belonging to the same genus as the cultivated potato (Solanum tuberosum). Its discoverer had probably no idea that at some future day it would so far extend its range and prove so noxious an insect, but as the country became settled it was found transferring itself to the potato fields, where it obtained a more abundant and constant supply of food, and where it increased in numbers proportionately. By 1861 the beetles had become so numerous in Kansas that over two bushels of them were gathered in one garden. During the last twenty years they have rapidly extended their range eastward, and in the past summer they have been reported from Nova Scotia. While they still cause much trouble and a certain amount of loss to pototo growers, they are no longer feared as they were when their ravages were first made known. Paris green and London purple, when properly applied, have proved efficient destroyers, while planting early ripening species of potatoes, ensures their maturing before the beetles become n
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
