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Re: Spider Mites

Dear Joe (and others who replied)

The jet black "eggs" on the tips of the plant show no movement even under a
magnifying glass.    The color of whatever minute bug is in the plant saucer
is definitely gray.  The plant leaves show no damage whatsoever.

Where can I go for more information and, if possible, photos of Aphis
Hederae?  I am so anxious to track this down (and write a piece about it for
the "Ivy Journal"  as many people have trouble with mites/aphids on ivy
grown indoors, particularly in the winter.

Thanks for your help.
Suzanne
American Ivy Society


----- Original Message -----
From: "Joe Seals" <gardenguru@yahoo.com>
To: <Gardenwriters@topica.com>
Sent: Saturday, March 02, 2002 9:51 AM
Subject: Re: [GWL]: Spider Mites


> I'm with the other two good folks who voted for aphids
> rather than spider mites.
>
> There are at least two species of aphids that attack
> English ivy including one called, conveniently, the
> IVY APHID (Aphis hederae).
>
> The Ivy Aphid is dark purplish black or olive green or
> brownish black and it atacks the tender growing tips
> of the plant.
>
> Aphid life cycles can be complicated but to simplify
> it, I would say that from egg to adult, it takes 3-4
> weeks.  On indoor plants (where there is no
> "weather"), there is overlap of "broods" and in many
> cases there aren't even any eggs -- the critters are
> live-bearing.
>
> Because of the overlap in visible adults to
> non-visible eggs or tiniest young, it's difficult --
> IMPOSSIBLE? -- to control the little monsters with a
> single application of anything.  I've found that what
> works best on these kinds of things (including real
> spiders mites and scale and mealybug and other aphid
> relatives) is to make several applications (maybe 4-5)
> every 3-4 days apart.
>
> By the way, true spider mites ("red spiders") are VERY
> small (barely visible unless you collect a few adults
> on a piece of white paper and you see them moving; the
> average length of a female is 0.42mm!) and do lay
> eggs.  Eggs hatch in about 3 days from being layed and
> the young mature in 10-12 days and adults live 2-3
> weeks during the summer.  Indoors, these numbers would
> change for the worse (for you).
>
> Although the commonest species of spider mite does,
> indeed, cause "webbing", not all "spider" mites do
> that.  They all, however, do cause stippling,
> spotting, etc. on foliage, flowers, and fruits.
>
> Joe
> --- Suzanne Pierot <suzanne@hvi.net> wrote:
> > I am doing an article about spider mites (on ivy)
> > and urgently need some
> > help.  A reader has little black thingamajigs no
> > bigger than a grain of
> > cracked pepper that cluster on the tips of the
> > stems of the new growth.
> > Could these be the eggs of spider mites? Although
> > she washes her plant every
> > other day in cold water, these little black things
> > come back. There is no
> > webbing underneath the leaves as you would expect to
> > see from mites and
> > there is no typical mite damage to the plant
> > (probably from all the
> > washing).  In fact her plant is thriving.
> >
> > Although she has not observed any mites on the
> > plant, she sometimes  finds
> > live gray spider mites in the plant saucer.  Could
> > the black thingamajigs
> > be the eggs of the spider mites?  Do spider mites
> > lay eggs?   Are they
> > black?  If they do lay eggs how long does it take to
> > go from egg to mite?
> > What is the life cycle of a mite?
> > If anyone can answer these questions or has any tips
> > on how to cope with
> > mites I'd be mighty grateful.
> > Suzanne Pierot,
> > American Ivy Society
> >
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> =====
> Joe Seals
> Santa Maria, California --
> where the weather is always perfect
> and my garden always has something blooming
> and birds galore
>
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