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Stephen writes,

How should I apply Archer IGR and Tengard SFR for chiggers outdoors?

I just purchased some Archer IGR and And some Tengard SFR for my CHIGGER problem. Can you tell me when is the best time to apply each product to where I kill all adults and any eggs from hatching? I know I apply the SFR termiticide and insecticide first. But I am not sure when I need to apply the Archer IGR to keep the eggs from hatching. Also how long should I wait before doing another round of treatments?


Tengard SFR and Archer IGR can be mixed into the same gallon of water and sprayed at the same time. Both products can be used every 14 days outdoors. You should note that neither Archer IGR nor Tengard SFR are labled for use on chiggers and may only provide you with limited results. Treatments for chiggers should begin in May and could need to continue through the summer as new chiggers move into the area. Treating the entire lawn is of little benefit because chiggers avoid direct sunlight and normally will not infest areas that are mowed or otherwise well maintained. Focus treatment on the unkempt areas of the lawn and lawn edge.

Answer last updated on: 06/14/2011

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