. Insect pests of farm, garden and orchard . Fig. 134.—Corn ear-worms at work. The central cob has lieen attacked l)ya nearly full-grown worm, which has bored through the husk near themiddle. The eggs are semispherical in shape, al)out one-fifteenth inch indiameter, light yellowish, antl prettily corrugated with ridges asshown in Fig. 184, Those of the first brood aie laid on corn, peas,beans, or whatever food-plants are available, and liatcli in three tofive days, depending upon the temperature. The cateipillars of the first generation often attack corn whenabout knee-high, feeding in the axi
. Insect pests of farm, garden and orchard . Fig. 134.—Corn ear-worms at work. The central cob has lieen attacked l)ya nearly full-grown worm, which has bored through the husk near themiddle. The eggs are semispherical in shape, al)out one-fifteenth inch indiameter, light yellowish, antl prettily corrugated with ridges asshown in Fig. 184, Those of the first brood aie laid on corn, peas,beans, or whatever food-plants are available, and liatcli in three tofive days, depending upon the temperature. The cateipillars of the first generation often attack corn whenabout knee-high, feeding in the axils of the tender leaves, so that INSECTS INJURIOUS TO CORN 183 when tlio leaves unroll tluy bear horizontal rows of holes. Thecaterpillars are exceedingly varial)le in color, being from a lightgreen through rose color and l)rown to almost l)lack, and either. Fig. —Corn ear-worm. of ear of sugar-corn torn open, showingworms at work on tip and hole through which a full grown worni has left. striped, spotted or perfectly plain. The}- become full grown inabout 2^ weeks and are then about 1^ to Ih inches long. Whendone feeeding the caterpillar burrows 2 to 5 inches into the soilnear the base of the plant. A cell is then constructed wdiich runsback to within a half inch of the surface of the soil, so that the 184 INSECT PESTS OF FARM, GARDEN AND ORCHARD moth may readily push off this surface soil and escape. Theburrow finished, the larva retires to the bottom of the cell andthere molts and enters the pupal stage. The pupa is four-fifths inch long, shining the summer the moths emerge about two weeks later,but the last generation in the fall passes the winter in the pupalstage. Thus the complete life cycle from egg to adult mothrequires slightly over a month in midsummer, and from six toeight weeks for the sprin
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1915
