snoopy9438
czołg
Dołączył: 14 Lut 2011
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Skąd: England
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 Wysłany: Pią 19:26, 01 Kwi 2011 Temat postu: louis vuitton wallets silent+springnoa |
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the quail, and the robins, they are less and less able to produce young and to preserve the continuity of their race.
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From all over the world come echoes of the peril that faces birds in our modern world. The reports differ in detail, but always repeat the theme of death to wildlife in the wake of pesticides. Such are the stories of hundreds of small birds and partridges dying in France after vine stumps were treated with an arsenic-containing herbicide, or of partridge shoots in Belgium [link widoczny dla zalogowanych], once famous for the numbers of their birds [link widoczny dla zalogowanych], denuded of partridges after the spraying of nearby farmlands.
In England the major problem seems to be a specialized one, linked with the growing practice of treating seed with insecticides before sowing. Seed treatment is not a wholly new thing, but in earlier years the chemicals principally used were fungicides. No effects on birds seem to have been noticed. Then about 1956 there was a change to dual-purpose treatment; in addition to a fungicide, dieldrin [link widoczny dla zalogowanych], aldrin, or heptachlor was added to combat soil insects. Thereupon the situation changed for the worse.
In the spring of 1960 a deluge of reports of dead birds reached British wildlife authorities, including the British Trust for Ornithology, the Royal Society for the Protection of Biyilai：[link widoczny dla zalogowanych]
[link widoczny dla zalogowanych]
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