RE: pyrethrin's?

From: Mellard, David (dam7@cdc.gov)
Date: Tue Mar 31 1998 - 07:51:00 PST

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Date: Tue, 31 Mar 1998 10:51:00 -0500
From: "Mellard, David" <dam7@cdc.gov>
To: cp@opus.hpl.hp.com
Message-Id: <aabcdefg1097$foo@default>
Subject: RE: pyrethrin's?

>FYI, Please avoid spraying Drosera with a pyrethrin pesticide. I
>learned the hard way.
>
>David
>

Message from Bill Tribe

>> David, could you expand on this message? I've been using pyrethrum
based
>>pesticide for some time with few ill effects; the tentacles on some
Drosera
>>species (most notably D. capensis) occasionally fold in, but I've
never had
>>lasting damage to the plants, and the stuff seems very effective. I
>>generally use only a very light dose, so maybe I'm just below the
damage
>>threshold....

Hi Bill,

I lost a pot fo D. capensis seedlings by spraying them with pyrethrins.
I may have assume erroneously that all drosera are sensitive. I think
you're right about the dose being a factor with a lighter dose not being
fatal.

David

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