Mosquitos hatching from toilet!

carolssisJuly 30, 2013

We have been here several years. It is now mosquito time, and again, we have them hatching out of the toilet. Does anyone have a suggestion as to how I rid my toilet of them? The eggs must have been laid under the rim, when I raise the seat, there they are. Not sure what I can use to kill the eggs, I've read of using oil to smother the eggs, but hesitate to put any kind of oil in the toilet. we live in Tucson Az, if that makes any difference. TIA

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mongoct

Are you sure they are mosquitos? Usually it's sewer flies.

    Bookmark   July 30, 2013 at 11:47PM
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Babka NorCal 9b

I thought mosquitos require STANDING water for their larva to hatch.

Whatever they are, wouldn't just a good swipe with a cloth and a bit of bleach water take care of them? How are they getting into your bathroom in the first place?

-Babka

    Bookmark   July 31, 2013 at 12:55AM
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writersblock

>I thought mosquitos require STANDING water for their larva to hatch.

Yes, whatever they are, they aren't mosquitoes. I agree with Babka about the treatment.

    Bookmark   July 31, 2013 at 1:13AM
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divotdiva

use a glove and catch some, put them in a jar and take to local Orkin distributor or similar to find out what they are and how to get rid of for good. Any local colleges with biology students - future entomologists?

    Bookmark   July 31, 2013 at 4:12AM
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pricklypearcactus

What exactly are sewer flies?

    Bookmark   July 31, 2013 at 10:02AM
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mongoct

Sewer flies, drain flies:

Some set up shop inside of the septic tank. They usually stay there until warm weather shows up, then they may migrate up the waste pipes and can show in the drains of the plumbing fixtures.

Some live within the first few feet of the drain inside the drain lines.

They like the organic crud in the pipes. A lot of treatments will kill the adults but not the larvae or eggs. Your best defense is to clean out the first few feet of your drain lines with a snake or a brush if you have one.

If you treat beyond that, you'll probably need multiple treatments. Usually all you'll kill are the adults, the unhatched or larvae may be immune. So even if you don't see any adults, keep the treatments going every few days for a few weeks to get each generation as they hatch.

    Bookmark   July 31, 2013 at 11:29AM
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Babka NorCal 9b

Oh, boy. Learn about something new everyday. I Googled "sewer flies" and there are many treatments, from home remedies to drain cleaners. Thanks, Mongoct! Never new there was such a thing.

-Babka

Here is a link that might be useful: Sewer Flies...remedies and photos too!

    Bookmark   July 31, 2013 at 12:52PM
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mongoct

Some things you just don't WANT to know about. lol

    Bookmark   July 31, 2013 at 6:25PM
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carolssis

yes they are mosquitos. When they land on you and bite, it's not anything other than a mosquito. Maybe they are hatching out of the tank and use the holes to the bowl to get out. At any rate, I still have mosquitos, we do not have septics here, the ground is caliche, hard as a rock and too expensive to dig, also does not drain well. Still, any ideas for removal of mosquitos? Have used bleach to clean out bowl. Maybe I should try in the tank?

    Bookmark   July 31, 2013 at 9:11PM
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mongoct

If that's the case, then maybe you have a bit of stagnant water in the rim? Maybe a few restricted holes in the rim?

You can try cleaning out the holes to make sure none are blocked, than tossing a mosquito puck in your tank. It'll take several weeks to fully dissolve so it'll do it's business over a good length of time whenever you flush.

If for some reason you think that portions of the rim are not getting flooded with the treated water, then you could put tape over most of the holes in the rim, then flush. With the rim holes restricted, the entire rim will bet a good flooding of treated water.

Not the definitive solution. Just an idea.

    Bookmark   July 31, 2013 at 9:59PM
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carolssis

The toilet was new when we moved in, installed by previous owners. How it got mosquitos in it, I don't know, they were here when we moved in. I tried again with the bleach, took lid off, swashed it off with bleach, put some in tank, wiped out inside of tank, then flushed it. I know I have mosquito dunks here somewhere, hubby isn't as organized as I am, they're in his workshop somewhere. How do I find the holes, as you suggest? Any idea what I could use to clean them out? Thanks for the suggestions. much appreciated.

    Bookmark   August 1, 2013 at 1:10PM
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Babka NorCal 9b

The holes are on the underside of the rim of the toilet bowl. That is where the water from the tank goes to fill the bowl to make it flush. If they are clogged, your toilet wouldn't flush very well. A skinny bottle brush or screw driver or bamboo skewer poked up there might dislodge any blockage. If when you flush, water comes easily out all those holes, they aren't clogged.

I still don't get the idea that mosquitoes could live in a toilet...unless you never use that toilet. Is this in a vacation house that sits vacant? How often do you flush it? They have to feed off of something, and if you can keep them away from a food source (your bod), they will die. Do you have another toilet you can use, and cover this one with plastic for the life cycle of a mosquito (guessing a couple weeks).

-Babka

    Bookmark   August 1, 2013 at 2:24PM
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Babka NorCal 9b

Duplicate post.

This post was edited by Babka on Fri, Aug 2, 13 at 12:13

    Bookmark   August 1, 2013 at 2:25PM
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carolssis

I don't understand this whole deal either. Mosquitos live in stagnant water, right, but nevertheless, they are still in my toilet. Twice last week, I lifted the lid, once there was one mosquito, next day, there were two when I lifted the lid. This was a new toilet when we moved in, 1.6 gal. flush, and appears to only have one outlet to the bowl. I knew if I posted, I'd get a bunch of weird comments, I think it's really weird too. This is our main bath, closing it off even temporarily is not an option. If I can't locate those mosquito dunks, I'm off to the hardware for some. One got me this morning, and left such a big welt, it woke me up when I was scratching it. My brother in law thinks they are as weird as I do, they are large, black and fly fairly slowly, so are easy to catch out of the air. Thanks for the help, we all appreciate it! Wish me luck with the dunks. :)

    Bookmark   August 2, 2013 at 9:31AM
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lee676

I'm starting to think that somewhat pricey Toto I just bought that sends all the water from two large holes on the side instead of dozens of tiny holes underneath the rim, was a good investment...

    Bookmark   August 2, 2013 at 2:18PM
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Babka NorCal 9b

IF you don't have a Toto with cyclone flushing like lee676, you have to stick your head into the toilet bowl to see the holes under the rim. OR you could use a mirror. What brand of toilet is it? Sleuthing....

DH just had a thought. You said this has been happening for the last couple years "during mosquito time". What is your water source? A pond? A storage tank? If it is a municipal water source it is time to call them to answer how the mosquitoes are getting into your water supply. Assuming you have screens on your windows. ;-)

-Babka

    Bookmark   August 2, 2013 at 4:33PM
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enduring

Have you called your County Extension Agency? I would ask them what they know about insects in toilets. The Extension Agencies are part of the land grand university systems. You live in Arizona, right? Then Arizona State University has an Extension agent that can find out from an Entomologist at the university about this. And it probably is free, unless there is a fee for insect identification.

I have never seen anything like this, but I live in the midwest. We have a million mosquitoes but never in the toilets that I am aware of, only outside in stagnant water, etc.

    Bookmark   August 2, 2013 at 5:00PM
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johnorange

This is an interesting discussion. Do you have any proof the mosquities are actually hatching from the toilet and not just flying there to the water from another area of the house? Mosquitoes do lay their eggs IN water...so they may be attracted to the toilet. IF you have mosquitoes actually hatching from water in the bowl of your toilet, you would be able to see the wriggling larval stage in the water for a few days before they hatch. I don't believe it's possible to "raise" mosquitoes in your toilet if it's flushed at least once every two or three days. I'm assuming the water for the toilet is from a chlorinated public water supply or from a deep well. If you are on a private shallow well, maybe you have mosquitoe larvae in your well and they are being pumped into your house with the water.

    Bookmark   August 7, 2013 at 2:24PM
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enduring

Guess what I found on my bathroom wall today :) I caught the little guy and I just know it is a drain fly also known as a sewer fly, or a moth fly.

I looked up on several university sites and found info. I will link them. I also read on Wikipedia that our flies do not bite, but there are species in arid regions that do, but I don't know if they are in the western hemisphere.

To find out where they are coming from you put a plastic cup over the drain over night. Coat the cup with oil or Vaseline (for stickiness). Then you will see. There are treatments. This is the first time that I am "aware of" seeing these flies. I only found one. The flies lay eggs where ever there is stagnant water. So this one could have come from somewhere on our farm...or from my drain.

http://www.nyc.gov/html/doh/html/environmental/sewfly.shtml

http://www2.ca.uky.edu/entomology/entfacts/ef615.asp

http://www.ipm.iastate.edu/ipm/iiin/mothfli.html

    Bookmark   August 9, 2013 at 3:05PM
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carolssis

Thanks for all the suggestions. I did use a mirror, looks like a slot under the rim, unable to see holes. I closed the sink drain and tub drains after using bleach. Then I begged and begged hubby for the mosquito dunks. Broke them up into sink and tub drains. Put 1/4 piece into tank. It appears to have worked. Haven't seen any mosquitos in several days. Strangely enough, there has never been a problem with the other bath. And again, no we do not have sewer flies here, just cockroaches big enough to carry away the cat! Thanks again for all the suggestions. I have my remaining supply of dunks hidden away for next year, hoping I won't need them!

    Bookmark   August 9, 2013 at 9:41PM
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Babka NorCal 9b

You never did say what your water source is. Consider calling a pest control company to see about the cockroaches. There HAS TO BE a way mosquitoes are getting into your water system from other than inside your house. If you have slits under your toilet rim where the water comes out when you flush, then stick a bamboo skewer in there to clear those out.

I think about your problem at night (!) as I doze off to sleep. There MUST be an answer to your very weird situation. I also get welts from mosquitoes...they love me.

-Babka

    Bookmark   August 10, 2013 at 1:04AM
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