Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; . economicentomol00smit Year: 1906 THE INSECT irOK/./l 229 as to render unprofitabk' if it does not kill tlum. The beetles are long-lived, and hide during tiie day on tin- uiulcr side of the leaves on which they feed. Hence, collecting and destroying them is the most satisfactory remedy, while the use of a tobacco extract on the ground will act both as a fertilizer and to destroy the subterranean larvce. The clover-leaf beetle, Phytoitoiiius piDictatus, is another (juite l
Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; . economicentomol00smit Year: 1906 THE INSECT irOK/./l 229 as to render unprofitabk' if it does not kill tlum. The beetles are long-lived, and hide during tiie day on tin- uiulcr side of the leaves on which they feed. Hence, collecting and destroying them is the most satisfactory remedy, while the use of a tobacco extract on the ground will act both as a fertilizer and to destroy the subterranean larvce. The clover-leaf beetle, Phytoitoiiius piDictatus, is another (juite large species, dull brown in color, with indefinitely striped wing- FiG. 234. Clover-leaf beetle, Phytonomus puiictalus.—a, egg; b, b, larv;e feeiiing; c, very young larva; y, cocoon, its net-like character shown at .?• ,• A, pupa ; /, beetle, on clover-stalk ; k, same, enlarged ; other letters refer to structural details. covers, and a short, stout beak. The larva is green, its form well shown in the figure, and it feeds chiefly at night, eating irregular holes in the leaves. When full grown it forms a peculiar net-like cocoon at or a little beneath the surface of the ground and pupates, becoming adult a few days thereafter. The insects hibernate in the larval stage, and their injury becomes manifest
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