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Bt pesticide resistance
On Wed, 13 Aug 2003 11:07:51 GMT, Mooshie peas
wrote: On Fri, 08 Aug 2003 17:30:23 +0200, Torsten Brinch posted: On Fri, 08 Aug 2003 04:20:48 GMT, "Moosh:}" wrote: On Thu, 07 Aug 2003 07:20:22 -0700, Walter Epp posted: [Quoting Independent on Sunday (London) March 30, 2003:] .. Environmentalists say that resistance develops all the faster because the insects are constantly exposed to it in the plants, rather than being subject to occasional spraying. Occasional spraying will result in many occasions where dose is sublethal. Ideal circumstances for resistance development. However, reminding ourselves of the perils of assumption-based reasoning, let us hear what the experienced farmers over at sci.agriculture has to say about that. Of course, but it is a well known mechanism of resistance development, sub-lethal doses that leave the partially susceptible mutants still alive. Antibiotic treatments are a case in point. The importance of finishing the full course prescribed, and not stopping when you feel better. Also, we should not forget to ask the agricultural scientist over at sci.agriculture whether resistance building is typically found where spraying has been done occasionally -- or whether resistance is more typically found where spraying has been done extensively, frequently or constantly. |
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