Slugs and a request for your comments

David Schaeffer via pbs pbs@lists.pacificbulbsociety.net
Sun, 20 Aug 2023 12:38:41 PDT
A shame they're so uncommon around here, but Northern red-bellied snakes
(*Storeria occipitomaculata*) are specialist slug feeders. I believe
DeKay's brown snake (*S. dekayi*) will also dine on slugs and is a bit more
common.

- Dave

On Sun, Aug 20, 2023, 3:27 PM Mike Rummerfield via pbs <
pbs@lists.pacificbulbsociety.net> wrote:

> I like Coin's idea.  I will try it.  (photo did not come through - I
> believe you can only do that now via the forum)
>
> Here in the usually moist Pacific Northwest, specifically western
> Washington, slugs, both native and introduced, are a perennial, constant
> problem.  However, this year the population of slugs is the lowest I've
> experienced in memory in the last 25 years --- maybe due to the fact we've
> had no appreciable precipitation in my area since the end of March --- it's
> a mediterranean climate, so summer drought is to be expected, but not of
> such a long duration.
>
> I have found using beer in containers with a little depth, i.e. cat food
> cans, cottage cheese containers, buried in the ground to near the rim *is*
> effective.  But two caveats:  it means going around and emptying the traps
> of dead slugs on a semi-regular basis; and this method also captures and
> drowns beneficial predatory ground beetles.
>
> I've also found that corrugated cardboard laid on the ground is favored by
> slugs who hide under it during the day, and can be dispatched.  They seem
> to have an affinity for the corrugated cardboard over any other covering
> (wooden boards are also effective, but less so).  Of course, it needs to
> remain at least minimally moist under the cardboard to be useful as a
> trap.  Not attractive, but *is* effective.
>
> Since I use only organic methods in all aspects on my property, I do use a
> slug bait that is certified (OMRI) organic.  The brand I use is 'Sluggo' -
> available at most nurseries and seasonably at local Costco(s).
> The active ingredient is iron phosphate.  It is claimed to be
> nonpoisonous to all other creatures and this has been my experience.
> Unfortunately, it is inadvertently also an expensive mouse and bird food -
> although it does not harm them, nor my cat who eats the mice.  A note:
>  'Sluggo Plus' *does *contain spinosad (also certified as organic),
> which helps control earwigs, cutworms, and sow bugs, but also is
> poisonous to other non-targeted insects, including honeybees that might
> come in contact with it on the ground.
>
> Regarding geophytes and slugs  -  slugs do eat the flowers of Galanthus and
> Narcissus, but usually leave the leaves alone.  To my surprise, and dismay,
> slugs do favor the leaves and flowers of amaryllids.  Ditto for Tulipa, and
> less so on Crocus and irids.
>
> This year's extended, hot, dry weather has caused an unusually high
> population of spider mites on many plants, including some not usually
> affected by this pest.
>
> If you've made it this far in this email, it is further than I would have
> made.
> Best wishes to all for a prodigious gardening season.
> Mike
> Western Washington, cool mediterranean
>
>
> >
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