. Manual of vegetable-garden insects. mustard, lambs quarters, pigweed,dock, sorrel, tumbleweed and nettle. The hop flea-beetle is about ^ inch inlength and bronzy black in color. Theantennae are brownish, pale at the legs are reddish yellow with the middleand front femora black and the hind pairbronzy (Fig. 212). The beetles hibernateunder any convenient shelter, such as cracksand crevices of posts or poles, in the hollowstems of plants, under grass or weeds, and in the soil British Columbia they emerge in INIarch or April and soonbegin feeding on the foliage of their food
. Manual of vegetable-garden insects. mustard, lambs quarters, pigweed,dock, sorrel, tumbleweed and nettle. The hop flea-beetle is about ^ inch inlength and bronzy black in color. Theantennae are brownish, pale at the legs are reddish yellow with the middleand front femora black and the hind pairbronzy (Fig. 212). The beetles hibernateunder any convenient shelter, such as cracksand crevices of posts or poles, in the hollowstems of plants, under grass or weeds, and in the soil British Columbia they emerge in INIarch or April and soonbegin feeding on the foliage of their food plants, eating outpits, but usually do not perforate the leaf. The injured areasoon dries, however, and may break away, leaving a holethrough the leaf. The foliage is often riddled in this way andin the case of hops the leaves are reduced to mere shreds. The females enter the soil to lay their eggs on the roots ofthe hop. The egg is about ts inch long, elliptico-cylindrical,and yellowish in color. They are found at a depth of one to. Fig. 212. —The hopflea-beetle (X 10). S^Q MANUAL OF VEGETABLE-GARDEN INSECTS two inches in the soil. The eggs hatch in about three weeksoi a little less, depending on the temperature, and the younglarva begins feeding on the roots. Although the larvne haveonly been found on hop roots, they undoubtedly feed on otherplants. They become full-grown in about three weeks. Theyare then about j inch in length, white, with the head, thoracicshield and anal plate darker. After reaching maturity, thelarva becomes somewhat shorter and thicker and rests in adormant condition for nearly two weeks before transformingto the white pupa. Pupation takes place in the soil but notin an earthen cell. The pupal period averages about sixteendays. There are two generations annually. From eggs de-posited in the early spring by over-wintered beetles, a newbrood of adults is produced the last of May or early in June,and another brood appears the last of July or the first of
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1918
