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Debbie from Douglas writes

Does Gentrol IGR Concentrate kill spiders?


Gentrol IGR Concentrate is an insect growth regulator.  It is not an insecticide and does not kill insects or spiders.  This product prohibits insects from being able to reproduce, but is not labeled for spiders.  We recommend using Onslaught FastCap for spider control. 

Answer last updated on: 10/03/2016

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