. Circular. Insect pests; Insect pests. Fig. 3.—Common asparagus beetle (Crioceris asparagi) : a. Beetle; b, egg; c, newly hatched larva; d, full-grown larva; c, pupa. All enlarged (author's illustration). cutting the asparagus for market, the beetles issue from their hiber- nating quarters and lay the eggs for the first brood. The egg is very large in proportion to the beetle, being nearly a sixteenth of an inch in length, and of the elongate-oval form illus- trated at h (fig. 3). It is nearly three times as long as wide and of a dark-brown color. The eggs are deposited end^vise upon the stem
. Circular. Insect pests; Insect pests. Fig. 3.—Common asparagus beetle (Crioceris asparagi) : a. Beetle; b, egg; c, newly hatched larva; d, full-grown larva; c, pupa. All enlarged (author's illustration). cutting the asparagus for market, the beetles issue from their hiber- nating quarters and lay the eggs for the first brood. The egg is very large in proportion to the beetle, being nearly a sixteenth of an inch in length, and of the elongate-oval form illus- trated at h (fig. 3). It is nearly three times as long as wide and of a dark-brown color. The eggs are deposited end^vise upon the stem or foliage and in early spring on the developing stalks, usually in rows of 2 to 7 or more (fig. 4:). In from three to eight days the eggs hatch, the 3"0ung larva?, commonly called '' grubs " or " worms," presenting the appearance indicated in fig. 3, e. The head of the newly hatched larva is large, black, and bead-like; its body is gray; and its three pairs of legs, black. It at once be- gins to feed, and is from ten days to a fortnight, according to Fitch and others, in attaining full size. When full grown the larva appears as in fig. 3. (L It is soft and fleshy, much wrinkled, and of a dark gray or olive color, sometimes light, but not infrequently very dark. The head is shining black, as are also the six legs. Each segment is provided with a pair of foot-like tuber- cles, which, with the anal proleg. assist it in crawling and in clinging to the plant. The mature larva enters the earth, and here, within a little rounded, dirt-covered cocoon which it forms, the pupa state is [Cir. 102] —Eggsof commonas- paragus beetle (Crioceris asparagi) on asparagus buds. Somewhat en- larged (original).. 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 United States. Bureau of Entomology. Wa
Size: 2094px × 1193px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1904
