RE: [Aroid-l] Spider Mites

**&* R* <d*@skg.com>**

The predator mites are definitly one way to go...we have been using them
to controll the mites in our Calathea house for many years. For years we
could hardly controll mites in the Calathea House without spraying every
one to two weeks. Now the mites are not a problem.
We spread new cultures of predator mites them every two weeks just in
case they can not reproduce in our hot summer temperatures or they run
out of mites to eat. The one problem is that when you spray for other
insect pests you must use pesticides that have little or no residual
(ie. Cygon) as the long term chemicals (ie. Talstar) can effect the
predators ability to survive. 

Denis
Silver Krome Gardens

-----Original Message-----
From: aroid-l-bounces@gizmoworks.com [a*@gizmoworks.
com] On Behalf Of Michael Marcotrigiano
Sent: Wednesday, April 25, 2007 9:46 PM
To: aroid-l@gizmoworks.com
Subject: RE: [Aroid-l] Spider Mites

30% is low in full sun. Can he put a mister on the plants? Wetting the
mites down interupts them too so hosing down foliage may help. We rarely
see mites in our conservatory but it runs about 60% humidity all the
time and in summer it can go to 80%. Mealybugs on the other hand are not
so fussy so we get them on old plants.

_______________________________

Michael Marcotrigiano, Ph.D
Director of the Botanic Garden and Professor of Biological Sciences
Smith College, Lyman Conservatory, College Lane Northampton, MA 01063
email: mmarcotr@smith.edu
voice: 413-585-2741; fax: 413-585-2744
www.smith.edu/garden
------------------------------------------------------------------------
-----------
Trees are poems that earth writes upon the sky,
We fell them down and turn them into paper,
That we may record our emptiness.
~ Kahlil Gibran
>>> "D. Christopher Rogers" <crogers@ecoanalysts.com> 04/25/07 4:30 PM
>>>
Hello, Michael!

Thanks for the input. Can you define "low humidity"? His greenhouse runs
between 30% during the day and 80% at night.

Christopher

D. Christopher Rogers
Invertebrate Ecologist/Taxonomist
((,///////////=====<

EcoAnalysts, Inc.
(530) 406-1178
166 Buckeye Street
Woodland CA 95695 USA

● Invertebrate Taxonomy
● Invertebrate Ecological Studies
● Bioassessment and Study Design
● Endangered Invertebrate Species
● Zooplankton
● Periphyton/ Phytoplankton

Moscow, ID ● Bozeman, MT ● Woodland, CA ● Neosho, MO ● Selinsgrove,
PA www.ecoanalysts.com

-----Original Message-----
From: aroid-l-bounces@gizmoworks.com [a*@gizmoworks.
com]On Behalf Of Michael Marcotrigiano
Sent: Wednesday, April 25, 2007 1:01 PM
To: Aroid-L
Subject: Re: [Aroid-l] Spider Mites

They like low humidity. That is one of the main reasons they build up.
There are chemical miticides if he is not the "organic" type.

_______________________________

Michael Marcotrigiano, Ph.D
Director of the Botanic Garden and Professor of Biological Sciences
Smith College, Lyman Conservatory, College Lane Northampton, MA 01063
email: mmarcotr@smith.edu
voice: 413-585-2741; fax: 413-585-2744
www.smith.edu/garden
------------------------------------------------------------------------
-----------
Trees are poems that earth writes upon the sky,
We fell them down and turn them into paper,
That we may record our emptiness.
~ Kahlil Gibran

>>> "D. Christopher Rogers" <crogers@ecoanalysts.com> 4/25/2007 3:08 PM
>>>
Howdy,

Anyone have a good method for dealing with spider mites? The keep
popping up in my friend's greenhouse. They really seem to like
Amorphophallus, Xanthosoma, Alocasia, and Colocasia, ignoring everything
else. He has been using neem oil, but it seems to kill off leaves. He
went to a weaker concentration, which knocks down the mites immediately
and saves the leaves, but even after spraying twice a day for two weeks,
they just pop right back up. They appear to be the two-spotted spider
mite.

Thank you in advance,
Christopher

D. Christopher Rogers
Invertebrate Ecologist/Taxonomist
((,///////////=====<

EcoAnalysts, Inc.
(530) 406-1178
166 Buckeye Street
Woodland CA 95695 USA

? Invertebrate Taxonomy
? Invertebrate Ecological Studies
? Bioassessment and Study Design
? Endangered Invertebrate Species
? Zooplankton
? Periphyton/ Phytoplankton

Moscow, ID ? Bozeman, MT ? Woodland, CA ? Neosho, MO ? Selinsgrove, PA
www.ecoanalysts.com <http://www.ecoanalysts.com/>

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