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Michigan | Wife used them for her horses, 5-10 horses at any give time, in 2005 and 2006. Last year 2007, she skipped the program. Very few flies in the years she used it - last year flies were all over. It may have been just a bad year for flies or the predators are effective. They do not bite and you really never notice them. I think she ordered them for this year.
I don't know how they would work on a large operation or if it would be cost effective.
Just a note - if you use them, they come in a box in a larvae state. You are supposed to watch them and when they start hatching then you release them. Well she let them hatch in the entryway to the house (it had been below freezing and she brought the box in from the barn - forgot she put them there) - Anyway you are actually buying some type of insect as we found out (it seemed like there were millions of them). | |
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Fly predators?
