. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 5o8 Bulletin 78. We have had several of the flies emerge in cages of young cabbage plants, from hibernating puparia brought from Long Island ; and also have had hundreds of the flies of the second brood emerge in large frame cages (figure 10) containing radish, turnip, cabbage, and hedge mustard plants. Yet the female could not be induced to lay a single egg ; while flies came in from out of doors and freely oviposited on similar plants growing exposed i
. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 5o8 Bulletin 78. We have had several of the flies emerge in cages of young cabbage plants, from hibernating puparia brought from Long Island ; and also have had hundreds of the flies of the second brood emerge in large frame cages (figure 10) containing radish, turnip, cabbage, and hedge mustard plants. Yet the female could not be induced to lay a single egg ; while flies came in from out of doors and freely oviposited on similar plants growing exposed in a bed but a few feet from the cages. Thus all our efforts to breed this insect from the egg in confinement, have thus far been unsuccessful. Habits of the first brood of viaggots.—In emerging, the maggot pushes through the blunter end of the ^"gg which splits down along the sides of the deep groove. The young maggots at once attack the surface of the root. By means of its strong, curved, hook-like mouth parts shown much enlarged in figure 9, it soon rasps out a burrow along the surface. The tender rootlets seem to be the first objective point of the young larvae. These destroyed, the maggots turn their attention parts of the mig- to the main root into which they burrow, often 1argef.'^{A'dap7ed girdling it as shown in figure i. The figure on the from J. ""'?'?) fi-Qj^t of the bulletin shows the maggots at this work, and their effect on a cabbage root. Usually the maggots are found in slimy burrows in the bark just beneath the surface ; and sometimes one is found just enter- ing the bark, " with the end of its body projecting stiffly out, like a peg driven in half its length," as Dr. Fitch describes it. The interior portion of a rather large cabbage root is so woody that the maggots do not often work in it, but they sometimes pene- trate into the interior of the softer stem farther up. When but a few maggots occur on a root, they are usually to be fo
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