Flies on my Hydrangea

brighteyesLC7July 7, 2013

Hello,

I have a pretty hydrangea that has become host to a swarm of black flies. These are the typical houseflies. The hydr. is one that starts white and changes to pink then red in the fall (I can't remember the exact name) and has a more open flower structure than a typical hydrangea. Is this a common problem? It's grossing me out!

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luis_pr(7b/8a Hurst, TX)

I have seen this reported often with paniculatas. It seems the blooms are magnets for a type of fly that helps attract polinators... the flies in this case. They do no harm to the shrubs, people or pets and can controlled by either using citronella candles or by attracting birds with bird feeders.

    Bookmark   July 7, 2013 at 5:27PM
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brighteyesLC7

Thank Luis. I wouldn't be bothered but the plant is right by my front entry! I appreciate your response!

    Bookmark   July 7, 2013 at 6:56PM
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IanW Zone 5 Ont. Can.

luis_pr is right on the money....the flies particularly love my Quickfire hydrangeas too

    Bookmark   July 7, 2013 at 8:45PM
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springwood_gardens(6B Pittsburgh)

Agreed! My QF attracts basically ALL insects that feed on pollen. Snow Mountain also blooms around the same time and attracts a similar crowd...

If you watch carefully for just a few minutes, you'll notice:

- ALL Bees (sweat, bumble, boring, honey, etc.)
- ALL Wasps
- ALL ants
- ALL flies
- various beetles

If you're that scared of bugs, you can try coating with insecticides, but I'm not particularly interested in disturbing such a large cross-section of my local insect ecosystem.

    Bookmark   July 9, 2013 at 7:21AM
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brighteyesLC7

Thanks Springwood. I'm not scared as much as grossed out. I'm also a little worried all those flies may decide it's time to move into my house when the cool weather comes... Not sure I'll do anything right away, but I might replace the plant this fall.

    Bookmark   July 10, 2013 at 11:06AM
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luis_pr(7b/8a Hurst, TX)

I understand the problem. I have wasps build nests right above my entry door some years (not because of hydrangea's though).

    Bookmark   July 10, 2013 at 3:41PM
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