. Insect pests of farm, garden and orchard . Fig. 433.—Plum curcuha on youngapple and egg punctures — enlarged. Fig. 434.—The plum cur-culio — enlarged fivetimes. (After Stedman.) egg puncture of the plum curculio is shaped like a crescent andhas given it the very apt name of little Turk. The female 578 INSECT PESTS OF FARM, GARDEN AND ORCHARD first eats out a small hole with her stout snout, and deposits asmall, oval, white egg in the cavity. She then cuts a small seg-ment of the skin and flesh around it so that the growth of thefruit will not crush the egg, the whole operation taking fromfif
. Insect pests of farm, garden and orchard . Fig. 433.—Plum curcuha on youngapple and egg punctures — enlarged. Fig. 434.—The plum cur-culio — enlarged fivetimes. (After Stedman.) egg puncture of the plum curculio is shaped like a crescent andhas given it the very apt name of little Turk. The female 578 INSECT PESTS OF FARM, GARDEN AND ORCHARD first eats out a small hole with her stout snout, and deposits asmall, oval, white egg in the cavity. She then cuts a small seg-ment of the skin and flesh around it so that the growth of thefruit will not crush the egg, the whole operation taking fromfifteen to thirty minutes. The life of the female averages abouttwo months, during which time she will lay 100 to 300 eggs andprobably makes as many more feeding punctures. The puncturesmade by the adults of both sexes in feeding are simple roundholes like those in which the eggs are laid, but without the crescent. Fig. 435.—Larvae of the plum curculio—enlarged five times. (After Stedman.) marks. Frequently gum exudes from punctures on the stonefruits. The egg hatches in from three to five days and the younglarva bores into the fruit until grown, usually feeding around thepit in stone fruits. The larva becomes grown in from twelve toeighteen days (in peaches) according to Quaintancc, but in centralIllinois in fallen apples it requires from twenty to twenty-sixdays according to Ciandall. When full grown the larva leavesthe fruit and enters the soil, where it forms a small cell an inchor two below the surface, in which it transforms to a white or four weeks elapse before the emergence of the adult SOME INSECTS INJURIOUS TO ORCHARD FRUITS 579 beetles; the first emerge about ten weeks after the applesblossom, the majority appear two or three weeks later, and therest continue to emerge until October. If the weather is chythe beetles may remain in the cells much longer than normally,whi
Size: 1751px × 1427px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1915
