. Bulletin of the Department of Agriculture. Agriculture; Agriculture. THE OLOVEB ROOT BOREB 7 ima Valley, western Washington from Oregon in the Canadian boun- dary); and in Western Oregon, at leasl as far south as Medford. Figure 1 presents the known distribution in the United States. The wide distribution of this species over regions of the world where red clover is a common crop and its early appearance in mosl new clover regions would indicate that the species is readily trans- ported by commercial intercourse. Knot borers may be transported in hay shipments, because the beetles are s
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. THE OLOVEB ROOT BOREB 7 ima Valley, western Washington from Oregon in the Canadian boun- dary); and in Western Oregon, at leasl as far south as Medford. Figure 1 presents the known distribution in the United States. The wide distribution of this species over regions of the world where red clover is a common crop and its early appearance in mosl new clover regions would indicate that the species is readily trans- ported by commercial intercourse. Knot borers may be transported in hay shipments, because the beetles are sometimes found mining in the stems of clover, and, in cases of severe infestation, the clover tops and even portions of the root crown may be pulled oul by the mower and become part of the hay. Adult root borers may also be transported in soil taken from the vicinity of clover plant-, and in other ways during the period of flight, when they are often found in unexpected places. DESCRIPTION EGG The egg (fig. 2) is short-oval in shape, with one side somewhat less rounded than the other, pearl}' white in color, smooth and glistening. Eggs in which development has begun are transpar- ent at one end, because of retraction of the egg con- tents; whereas the fresh eggs are altogether opaque. The egg measures mm. long by mm. wide at the widest part. Eggs are found in niches, which are plugged with wads of frass, in the walls of the egg galleries. LARVA. 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. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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