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[Arabidopsis] RE:Fungus gnats

Scott Poethig via arab-gen%40net.bio.net (by spoethig from sas.upenn.edu)
Wed Apr 27 13:45:54 EST 2011

The previous, liquid, formulation of Gnatrol was quite effective and  
we used it exclusively for the control of fungus gnats.   This  
formulation has been discontinued.   Gnatrol is now only available  as  
a wettable powder and, for some unknown reason, appears to be much  
less effective in this form.  We have returned to using nematodes for  
fungus gnat control.

Scott Poethig

On Apr 27, 2011, at 1:21 PM, Charles Gasser wrote:

> Vera,
> Another option is Gnatrol, a Bt-based soil treatment.  We have had  
> very good luck with it.  It is not persistent in the soil and so  
> sometimes needs to be included in watering more than once, but in  
> our experience in doesn't have any deleterious effects on the plants  
> (it is just a preparation of dead bacteria harboring the dipteran- 
> specific insecticidal protein).  A google search will find lots of  
> sources and several protocols.
> Chuck Gasser
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