Fly Predator Questions

Ineffective fly predators

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I am seriously disappointed with the fly predators I’ve received this year.  Here is a video example of our infestation.  The flies don’t seem to hatch out very well, noticed.  What can be done?

David Hyland


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  • We have these exact same looking pests as well. Are they gnats, the fly predators or what?! Same question for me they are swarming all over

  • I also have these....    I check my horses daily (I have 2), remove manure, etc...  I am using fly masks the flies are SO BAD.  I'm have traps set up, am using the spray and the fly predators.  Seriously, they seem so bad I want to get pesticide....  but I know that would just reboot the whole process.  HELP! Too many flies!  

  • Hello David, Katie, And Donna,

    The insects swarming in the video are fungus gnats.  They are attracted to the moisture in the manure.

    They pose no threat and will not bite and actually help in the decomposition of manure.

    The reason you are seeing more of the gnats this year is likely due to the excessive rains this fly season.

    If we can be of further assistance please call and speak to one of our agents @ 1.888.880.1579.

    Thank you,

    Sonny G

  • I have not seen a difference in using the fly predators at all, We use fly Predators, fly traps, fly spray, fly masks, clean our paddocks, all as suggested, but no difference compared to last year? I am thinking of cancelling my next order.  This is a waste of money, I don't even see the fly predators?  You only answered the first question  about the swarming fungus gnats, but no suggestions on the extreme fly problems with your predators?  

  • Doreen,

    Please give us a call at 866.404.3895.  There are so many variables when it comes to fly populations that there are a ton of questions we need to ask to pinpoint the problem.  If your Fly Predators are not hatching, we need to look at what day they are shipping, track packages to see what is happening, and ask about your mail service.  If they are hatching, then we need to ask questions to determine the species of flies most prevalent, because different fly species breed in different areas.  Once we know the species causing the most problems, then we have to figure out why that species and where it is primarily breeding.  Sometimes the biggest fly sources come from unexpected places and it is just a simple matter to change where or how you are distributing Fly Predators.  

    Thank you,


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  • Well, I hope you were able to get over it. Flies are scary sometimes.

    Ken |

  • Fly predators will not attack adult flies, thus care must be taken to keep the existing population as low as possible.  cool math. games

  • Fly predators will not attack adult flies, thus care must be taken to keep the existing population as low as possible.  mobile window tinting

  • We have fly problems with our cattle all the time. have you tried any traps?

    Roger at hardwood flooring Memphis

  • I feel you! It has been a nightmare for me. The ones I received did not do much help.

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  • I hate flies. Especially when they're bothering our horses. Here in Texas, it seems like we have them all year round. They're so annoying. We have a Painting company Wichita Falls so we're here, if anyone else is in the area. 

  • I've never experienced this kind of problem, but I learn a lot from this site. Thank you for sharing.

  • For best results, start releasing before flies become a problem. Release rates, as with any beneficial insect, depend on several factors. The following guidelines have been successfully tested under normal pest conditions:

    large animals (horse, cow, etc.) – 500 per animal

    medium animals (sheep, goat, etc.) – 250 per animal

    small animals (birds, rabbits, etc.) – 5 per animal

    manure & compost piles – 5 per cubic foot

    It’s best to make releases throughout the entire pest season for the following reasons:

    Flies have a much shorter life-cycle than the parasites.

    Flies produce more eggs in a shorter period of time.retaining walls perth

    Releasing small amounts of parasites weekly, every other week, or even monthly has proven to be more effective than one large release