Report of the Commissioners . Fig. 39. Fig. Fi;^. 3f/ hHowh the male ; FigJ/O the female ; and Fig. ^fl (a) tlie larva, and (h) the \Mr. Bethune.^ INSECTS AND INSECTIVOROUS BIRDS. 40 This insect appears to have come over from England or Ireland in one of the Allanline of steamers. FIEST APPEARANCE, AND RAPID DISTRIBUTION. It was first observed in the neighbourhood of Quebec, in 1859, by Mr. Couper. Itfounditself at home there at once, as cabbages are very largely cultivated by the French Cana-dians. By degrees it spread westward and southward, until it now covers all the
Report of the Commissioners . Fig. 39. Fig. Fi;^. 3f/ hHowh the male ; FigJ/O the female ; and Fig. ^fl (a) tlie larva, and (h) the \Mr. Bethune.^ INSECTS AND INSECTIVOROUS BIRDS. 40 This insect appears to have come over from England or Ireland in one of the Allanline of steamers. FIEST APPEARANCE, AND RAPID DISTRIBUTION. It was first observed in the neighbourhood of Quebec, in 1859, by Mr. Couper. Itfounditself at home there at once, as cabbages are very largely cultivated by the French Cana-dians. By degrees it spread westward and southward, until it now covers all the Eastern,a,nd most of the Middle States, as well as the Province of Ontario, and is even found asfar south as Virginia. THE FIRST ATTACK SEVERE. Its first attack in any locality is generally excessively severe, almost entirely destroy-ing the crop of cabbages and cauliflowers. In about two years, however, its numbersgradually diminish, until it becomes only a moderate pest, as it is with us now. A PARASITICAL DESTROYER. This diminution is entir
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectagriculture, bookyear
