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  • From: "Marge Talt" <mtalt@hort.net>
  • To: "gardenwriters-on-gardening" <gwl-g@lists.ibiblio.org>
  • Subject: Re: [gwl-g] natural slug controls
  • Date: Tue, 13 Apr 2004 02:35:21 -0400

> From: Jeff Lowenfels <jeff@gardener.com>
> The information I got about the coffee grounds and coffee spray
came from
> the USDA My readers and I have had great success...
----------

Delighted with your success, Jeff, wish I could say the same - slugs
relish my Tricyrtis surrounded by coffee grounds as much as when they
aren't...here are some of the articles I read about the subject that
indicate the effectiveness of caffeine but only using solutions of
pure caffeine (unobtainable by normal people) at rates higher than
found in normal coffee...no question caffeine is effective; my caveat
is that what's left in coffee grounds is not of sufficient strength
to kill the blighters:

"Caffeine as a repellent for Slugs and Snails" reprinted from Nature
(27 June, Vol. 417, pp. 915-916.
(link to the .pdf file of the research results)
http://snipurl.com/5o6z

"Coffee Breaks Slugs" Nature Science Update, 27 June, 2002
http://www.nature.com/nsu/020624/020624-8.html

"A Slug of Caffeine" reprinted from Crops Magazine, 20 July, 2002
http://news.bbc.co.uk/1/hi/sci/tech/2067214.stm

Note that some plants were adversely affected; ferns, for instance.

Marge Talt, zone 7 Maryland
mtalt@hort.net
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