. Insect pests of farm, garden and orchard . FiG. 148.—The alfalfa weevil, adults, clusteringon and attacking sprig of alfalfa—natural size.(After Webster, U. S. Dept. Agr.) INSECTS INJURIOUS TO CLOVER 207 tion was found to contain 127 of these punctures, and as eachpuncture contains ten or fifteen eggs, this phmt probably boresome 1200 eggs, although it was exceptional. The eggs hatch in about ten clays and the small white larvaemake their way to the leaves, in which they cat small holes. Theysoon turn a decidedly green color, and when full grown are al^outone-half inch long with a white stri
. Insect pests of farm, garden and orchard . FiG. 148.—The alfalfa weevil, adults, clusteringon and attacking sprig of alfalfa—natural size.(After Webster, U. S. Dept. Agr.) INSECTS INJURIOUS TO CLOVER 207 tion was found to contain 127 of these punctures, and as eachpuncture contains ten or fifteen eggs, this phmt probably boresome 1200 eggs, although it was exceptional. The eggs hatch in about ten clays and the small white larvaemake their way to the leaves, in which they cat small holes. Theysoon turn a decidedly green color, and when full grown are al^outone-half inch long with a white stripe down the middle of the backand somewhat curved as shown in Fig. l-tOc. They attack theyoung leaves and crown so that a badly infested field will not getover six inches high; too short to mow. The larvae arc most. Fig. 149.—The alfalfa-weevil {Phytonomus inurinus): a, eggs; b, cocoon;c, larva; d, pupa; e, adult—all much enlarged. (After Webster, U. Agr.) abundant in May and decrease through June. When full grownthe larvae crawl or drop to the ground and spin their cocoonsin the dead leaves or rubbish. The cocoon is globular andcomposed of a network of rather coarse white threads, Fig. it the larva transforms to a pupa, which stage lasts fromone to two weeks, when the adult beetle emerges. From early to midsummer the beetles become more and moreabundant, and not only feed on the fresh growth, but attack thebark of the stems so that where excessively alumdant they totallydestroy the second crop. The entire life of the insect, from the deposition of the egg tothe emergence of the adult, may be anywhere from forty to seventy 208 INSECT PESTS OF FARM, GARDEN AND ORCHARD clays, while the beetle itself may live, including the winter, fromten to fourteen months.—Webster. Inasmuch
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