Fly Predators-interactions native species? - The Horse Forum
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post #1 of 11 Old 04-22-2013, 11:01 AM Thread Starter
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Fly Predators-interactions native species?

Hi all,
I know there are a lot of threads on here about Fly Predators. It seems like most people have had a really good experience, and I'm thinking about trying some this year.

Before I do, I'm curious if anyone knows anything about how they interact with native species? These days, it seems like you have to be so careful about introducing non-native plants & animals into the environment (for example, every year, I watch the Japanese knotweed march a little closer to my house...).

I don't think fly predators are considered invasive species, are they? Are there any concerns with fly predators interacting with native species, or do they just fit right in with the rest of the ecosystem in most parts of the US?
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post #2 of 11 Old 04-22-2013, 11:10 AM
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They're not a non-native species. They were developed using indigenous insects, so the only impact they have is on the fly species they target.

This is my 3rd year using them, and I can't say enough good things about them. You will have to use other means of pest control though, as predators primarily target stable flies and don't affect any of the other types.

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post #3 of 11 Old 04-22-2013, 11:13 AM Thread Starter
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Thanks, for the info Speed. Glad to know they wouldn't be considered invasive. I've heard only good things about their effectiveness, that question of native vs. invasive was one of the things holding me back.
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post #4 of 11 Old 04-22-2013, 11:54 AM
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Please don't let that stop you. They're definitely native insects.
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post #5 of 11 Old 04-22-2013, 12:04 PM
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My Vet's nurse encouraged me to try them last year after she'd had great results and we saw a big reduction in the number of flies by the end of the summer when they're usually at their worst so I'm now a huge fan.
It helps if you have proper containment for manure and a poo picking routine so you have prime locations for placing the predators where flies are most likely to gather
No they wont have a negative impact on any other insect life or birds
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post #6 of 11 Old 04-22-2013, 12:11 PM Thread Starter
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Thanks all, this is really great info. I can definitely see this becoming part of the routine!
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post #7 of 11 Old 04-22-2013, 12:18 PM
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This is year two at the ranch that I board. I've only been here since Nov, so I'm not sure how the flies out there were before. But I will say, that so far, I am very happy with the amounts of flies we have.
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post #8 of 11 Old 04-22-2013, 12:21 PM
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I really notice how many flies I don't have when I go somewhere that doesn't utilize the predators. Yowza! The difference is staggering!

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post #9 of 11 Old 04-22-2013, 12:41 PM
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You say they only target stable flies, while I DO have stable flies, my issues are with cluster flies and black biting flies (I suppose the later would be considered stable flies?) I'm not up to date on my fly species except that they are all annoying... I have been considering fly predators but had these questions, and also of their native/non-native status which has already been addressed here. Will they take care of these flies I've listed or are they useless for that purpose. Also, I have been having an exterminator come early fall every year to spray my house and garages, how long do the fly predators live?

On another subject, any suggestions for horse/deer fly problems? Last year I had issues multiple times where I'd find my gelding soaking wet from running away from a swarm of horse flies, and when I say swarm, I'm talking about hundreds of horse flies attacking him. I had to keep him inside all day with a fly sheet on all summer. Was thinking chickens might congregate near horses legs and nab the horse flies, but I can't get them until next year. Mosquitoes were the least of my problems last year, ugh.
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post #10 of 11 Old 04-22-2013, 12:46 PM
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Fly Predators are nature’s own enemy of all common manure and rotting organic matter breeding pest flies, including the common house fly, horn fly, biting stable fly and lesser house fly. In the natural environment Fly Predators serve as a major check of pest fly populations by destroying the next generation of flies in their immature pupa (cocoon) stage. Fly Predators are tiny, completely biteless and stingless. They never become a pest themselves.

https://www.spalding-labs.com/produc...predators.aspx
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