RE: [Aroid-l] Spider Mites

From: "Denis Rotolante" <denis at skg.com> on 2007.04.26 at 13:52:51(15599) 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 +More Silver Krome Gardens -----Original Message----- 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" 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----- 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" 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 _______________________________________________ Aroid-l mailing list Aroid-l@gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l _______________________________________________ Aroid-l mailing list Aroid-l@gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l _______________________________________________ Aroid-l mailing list Aroid-l@gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l _______________________________________________ Aroid-l mailing list Aroid-l@gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l

Note: this is a very old post, so no reply function is available.