Verwandte Artikel zu A manual of injurious insects
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Inhaltsangabe
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1881 Excerpt: ...off as briskly as the fleas from which they take one of their names on being meddled with. When viewed in the hand or under a magnifying glass some difference may be found in their size and marking. One of the largest and commonest kinds (H. nemorum) has a broad yellow stripe down each wing-case; another kind (H. concinna) is brassy, with a tooth on the second and hinder pairs of legs; another kind is black, and dark blue above; another is of a brighter blue above; but these are (as far as we know) alike in their method of living, in the harm they do, and the way in which they do it. The same methods of prevention or cure apply alike to all; and as it is almost impossible to distinguish them unless they are caught, and also as, however much they may vary in marking, still they are all " Turnip Fly," which is the point of view in which we are concerned with them here. I have only named two species, and refer the reader who wishes for further information regarding the different kinds to the 'Farm Insects' of John Curtis. During winter the Turnip Fly Beetles may be found sheltered under bark, fallen leaves, clods of earth, and the like places; also amongst stubble, and especially in heaps of long strawy manure left on the fields; and on particularly fine days they may be seen coming out to sun themselves. On the return of spring warmth they begin work, and, till the crops are ready for them, are especially to be found on weeds of the same family as the Turnip and Cabbage, such as Charlock, Shepherd's Purse, and Jackby-the-Hedge. When the attack begins on the Turnip the female lays her eggs, which are few in number, for successive days on the under side of the rough leaf. The maggots, which hatch from these in ten days, are white or yellowish, fleshy,...
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Reseña del editor
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1881 Excerpt: ...off as briskly as the fleas from which they take one of their names on being meddled with. When viewed in the hand or under a magnifying glass some difference may be found in their size and marking. One of the largest and commonest kinds (H. nemorum) has a broad yellow stripe down each wing-case; another kind (H. concinna) is brassy, with a tooth on the second and hinder pairs of legs; another kind is black, and dark blue above; another is of a brighter blue above; but these are (as far as we know) alike in their method of living, in the harm they do, and the way in which they do it. The same methods of prevention or cure apply alike to all; and as it is almost impossible to distinguish them unless they are caught, and also as, however much they may vary in marking, still they are all " Turnip Fly," which is the point of view in which we are concerned with them here. I have only named two species, and refer the reader who wishes for further information regarding the different kinds to the 'Farm Insects' of John Curtis. During winter the Turnip Fly Beetles may be found sheltered under bark, fallen leaves, clods of earth, and the like places; also amongst stubble, and especially in heaps of long strawy manure left on the fields; and on particularly fine days they may be seen coming out to sun themselves. On the return of spring warmth they begin work, and, till the crops are ready for them, are especially to be found on weeds of the same family as the Turnip and Cabbage, such as Charlock, Shepherd's Purse, and Jackby-the-Hedge. When the attack begins on the Turnip the female lays her eggs, which are few in number, for successive days on the under side of the rough leaf. The maggots, which hatch from these in ten days, are white or yellowish, fleshy,...
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