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apoxbrew
05-29-2013, 11:35 AM
We're approaching fruit fly season and I'm wondering if anyone has tips for control. We've tried the mason jar full of cider vinegar thing with little success.

Would love to hear if y'all have found anything that works well against these pesky insects.

Thanks!

brewmaster 2011
05-29-2013, 02:06 PM
Have growler filled with brett fermenting wort. Fruit flies and natts love it because brett smells like wild yeast fermenting rotten fruit.

bhbrew
05-29-2013, 02:59 PM
Try a drop of ivory liquid soap in the mason jar w/ cider vinegar. It works!
It puts a sheen on the surface they think they can land and they fall right in.

Bainbridge
05-29-2013, 03:51 PM
Lot of breweries, wineries, and bars use DDVP (Dichlorvos) pest control strips. They basically emit an odorless, heavier than air gas for about 4 months. Seeps into cracks and crevices, kills fruit flies and other bugs pretty darn well. Downsides are that DDVP has been banned in the EU but not by the EPA here, though they've thought about it several times, so take that for what you will. Maybe something best brought out when other methods have failed miserably.

jherrington
05-29-2013, 05:45 PM
I was having this fruit fly problem in the brewery and a friend gave me some Chrysanthemum extract to spray around. It killed all the fruit flies hanging around and kept them out for a few days as well. The product I had seemed pretty natural and safe, maybe better than spraying poison around the brewery.

liammckenna
05-30-2013, 04:47 AM
We're approaching fruit fly season and I'm wondering if anyone has tips for control. We've tried the mason jar full of cider vinegar thing with little success.

Would love to hear if y'all have found anything that works well against these pesky insects.

Thanks!

Not sure what's in these (http://www.leevalley.com/en/garden/page.aspx?cat=2,51555&p=44735) suckers, but wow.

Pax.

Liam

kugeman
05-30-2013, 06:02 AM
I've used the traps that Liam just posted. They definitely attract the fruit flies, but they don't eliminate the problem. You have to eliminate where they are breeding. Even if you kill all the flies you see, they'll be back in a few days. Thoroughly clean your drains and get some drain gel to pour in them overnight (or over a weekend). Do it weekly. Make sure any beer spills or water puddles are consistently cleaned up.

You might not be able to prevent them entirely, but you can make the problem manageable.

apoxbrew
06-04-2013, 01:31 PM
Thanks everyone!!

ChesterBrew
06-04-2013, 01:32 PM
Bleach, bleach, bleach...

Larry Horwitz
06-08-2013, 07:45 AM
Lot of breweries, wineries, and bars use DDVP (Dichlorvos) pest control strips. They basically emit an odorless, heavier than air gas for about 4 months. Seeps into cracks and crevices, kills fruit flies and other bugs pretty darn well. Downsides are that DDVP has been banned in the EU but not by the EPA here, though they've thought about it several times, so take that for what you will. Maybe something best brought out when other methods have failed miserably.

We have tried EVERYTHING...and these are hands down the best. Try 'Hot Shot' brand...sold at every Home Depot on the planet. Oh, and clean the crap out of everything every day. Drain flies are the worst!!

Natrat
06-12-2013, 06:58 AM
Learn to identify the egg clusters. They look like tiny brown spots, often on shiny white surfaces, windows...

Each cluster contains thousands...tens of thousands of viable eggs. You will be amazed how many of these are around. They need to be scrubbed off...I use hot water and floor juice, because I've ruined so many shirts using bleach.

If you can eliminate the eggs...or at least mostly eliminate the eggs, then once you get rid of your first round of flies, the problem is mostly gone. I've found that simply vacuuming them out of the air with a dust collector works pretty well.

Also, it turns out that using a foaming acid surface cleaner seems to pretty much eliminate them. I'm not sure why, but...whatever works!

Nat

aswissbrewer
06-25-2013, 02:04 AM
I was having this fruit fly problem in the brewery and a friend gave me some Chrysanthemum extract to spray around. It killed all the fruit flies hanging around and kept them out for a few days as well. The product I had seemed pretty natural and safe, maybe better than spraying poison around the brewery.

Hi
Thanks for the post.
Does his Chrysanthemum extract have a trade name? I'd like to try it.

We use something called Inficin which is apparently a plug of spent grains mixed with a bio-cultue and an insecticide of spme sorts. It keeps the Fruit flies in check but it also stinks strongly.

Cheers

liammckenna
06-25-2013, 07:47 AM
Does his Chrysanthemum extract have a trade name? I'd like to try it.


Pyrethrin is the chemical. A lot of commercial pesticides use this with other chemicals. It is (pyrethrin) pretty foodsafe and has low mammalian toxicity.

Pax.

Liam

OneMoreBrewer
06-25-2013, 08:28 AM
Pyrethrin is the chemical. A lot of commercial pesticides use this with other chemicals. It is (pyrethrin) pretty foodsafe and has low mammalian toxicity.

Pax.

Liam

I worked with flowers many years. This is correct. (Chrysanthemum) Very common in food preservation. Still, wash your food. It tends to loose its effectiveness drastically after about 48 hours. I believe it breaks down into non hazardous chemicals at that point. It is effective on most types of pests in plants and foods. Great stuff overall. Usually must be directly applied.

The dioclorvos is believed to excrete fast out of the human body and supposedly cause no human harm if kept below threshold limits and exposure time limits. I believe the excretion occurs over about 48hrs. Ban concers from the EU stem from concers that dioclorvos can bind to DNA. I believe the EPA or whoever feels that it safe because it leaves the body before it can bind to our DNA. You need to eat a lot of it, more than say 10grams, to approach a 50/50 shot of dying from it. I think someone said, it works through the air. Very effective. It is recommended to use in well ventilated areas though.

I would use the pyrethrum to remove any "nests" or groups that you are aware of, but use DDVP to prevent any future problems. If these are only seasonal issues, you should have no worries of chronic exposure. It's mainly a concern for manufacturing and industrial applications.

Don't underestimate the ability for a pest problem to increase exponentially. It's always best to stay ahead of it. I am not an EPA guy or nothing but I can read MSDS and have been down this road a few times.

Another common pesticide is nicotine, however I don't think it would be a good solution here. Also an organic (I believe) option sometimes is neem oil. You can put some in drains and such. Good luck.

BH Tavern
07-04-2013, 12:55 PM
I haven't seen this mentioned yet, but definitely get these: http://www.amazon.com/Kleen-Plug-Draft-Beer-Faucet-Brush/dp/B002S3Q4N4/ref=sr_1_2?ie=UTF8&qid=1372964079&sr=8-2&keywords=beer+faucet+caps

Put them in every night - keeps them out of one of the places they most often invade.

Larry Horwitz
07-05-2013, 09:11 AM
yeah...those faucet brushes are awesome...esp if you are using the old snotty cross vent faucets

Jephro
07-06-2013, 07:26 AM
Clean, clean, clean (obvious stated- check)

still not working right? Tip from and old-timer bug guy: a dash of bleach in every drain (the idea is for the bleach to sit in trap overnight...i was told this is where they throw their sex parties).

worked for me for years here in Western WA (never got the chance to try back in Missouri where the mosquito and fruit fly are in a tie for being the next state bird), keep an eye on blowoff buckets too (treat blow-off water as needed (sani, acid, bleach etc.) to make in-hospitable for horny fruit flies)

seems overly-simple right?
- Smart Workier, Not Harder and just say no to pesticides in brewery

Jephro
07-06-2013, 07:35 AM
yeah...those faucet brushes are awesome...esp if you are using the old snotty cross vent faucets

+1 love those thingis

BrewerRev
07-30-2013, 10:32 AM
We have tried EVERYTHING...and these are hands down the best. Try 'Hot Shot' brand...sold at every Home Depot on the planet. Oh, and clean the crap out of everything every day. Drain flies are the worst!!

How safe are the Hot Shot strips? I picked up some to use in our brewery and bar, but the owner vetoed them after reading on the packaging that they are not for use in food service and not for use in a room occupied for more than 4 hours. I assume that nobody has keeled over from using them in their breweries; I am just wondering what people's opinions are regarding their safety in a food-service environment.

OneMoreBrewer
07-31-2013, 08:15 AM
How safe are the Hot Shot strips? I picked up some to use in our brewery and bar, but the owner vetoed them after reading on the packaging that they are not for use in food service and not for use in a room occupied for more than 4 hours. I assume that nobody has keeled over from using them in their breweries; I am just wondering what people's opinions are regarding their safety in a food-service environment.

We use these in our non food/brewing areas. After fully reading the MSDS on the dichlorvos it was my decision, that with our seasonal usage, we will not be getting much exposure of the actual chemical. We also are using these in well ventilated areas. Furthermore, upon research, the chemical does not seem to have a direct known hazard to humans through acute toxicity. I feel the manufacturers 4 hour limit is half the OSHA limit in order to cover them legally incase you open ten packages in one room. The measurements you should be comcerened with are below. Realize that your patrons are not at risk, but employees will have the greatest rate of exposure. The product works extremely well, and if you have concerns about exposure I would recommend reading into it. As I said before, you'd have to actually consume a lot of the chemical for a period of time to have a detrimental effect.
Personally I believe these to be perfectly safe if used as intended. Just a suggestion, maybe use the chemical at night when less employees are present and remove it during the day.
Although we don't use them in the brewery directly, it is my opinion that our product (beer) is mainly contained in a vessel at all times and therefore unable to come into contact with the dichlorvos anyways.

The OSHA Permissible Exposure Limit (PEL) 1.0 mg/m3
The NIOSH Recommended Exposure Limit (REL) 1.0 mg/m3
The ACGIH Threshold Limit Value (TLV) 0.1 mg/m3
The OSHA Immediately Dangerous to Life and Health (IDLH) 100mg/m3
LD50 is another measurement I feel is important.

Bainbridge
07-31-2013, 10:18 AM
Agreed. Does wonders for keeping the fruit flies down in your dirty keg pile if you store your dirty kegs indoors.

rbrewhead
08-01-2013, 11:55 AM
If you have a cat in the brewery do NOT use pyrethrum. It is extremely toxic to cats.

AMS0286
08-14-2013, 07:37 PM
Like most have already said, clean, clean, clean. In a perfect brewery, this would eliminate the problem, but in most every other situation, something will always be missed. Without skipping over the obvious like refuse removal, bleach in drains, and faucet plugs, there are additional tactics to employ in the war with fruit flies. Our brewery is very small having only 2100 square feet to deal with. Recently I spent a span of four days away from the brewery (wedding season), leaving it in capable hands. Upon my return, I came upon the worst fruit fly infestation I have ever seen. More than likely, the trash was not removed between shifts over the weekend, but I'm not sure. Also to compound the issue, a dry hopped FV had overflowed leaving sticky beer/hop residue all over the place. The first step was to remove the breeding grounds. I then began employing the passive homemade traps (soda bottle cut in half, top upside down with bait, and plastic cups with cello wrap over the top and holes punched in that) but, this only caught about 30 each at that. The next, and best step I employed, was to break out the shop vac. While the traps caught their fair share, it was no match for the army of flies just sitting on and around the traps. If you let the swarm settle, it is very easy to capture massive amounts of them at a time using the shop vac. The few remaining are easily removed using the same method, but it takes a little more work. Leaving out a paper towel with a few drops of beer on it acts like chum, and much like blood in the water to sharks, the flies are instantly attracted to it. At that point, the shop vac easily removes them from the situation. Again, I have to echo, that proper cleaning practices, not leaving dirty kegs inside, and refuse removal are paramount in the war with fruit flies, but if you find yourself needing to win a battle, break out the shop vac!

DowneastCider
08-15-2013, 05:57 AM
Are the products me ruined in this thread good for house flies as well?

johnnypm41
05-12-2015, 01:44 PM
We're approaching fruit fly season and I'm wondering if anyone has tips for control. We've tried the mason jar full of cider vinegar thing with little success.

Would love to hear if y'all have found anything that works well against these pesky insects.

Thanks!

I placed an electric fly swat over a pail of apple cider vinegar. It sounds like popcorn popping, it's killing them so fast! DEATH BY ELECTRICICITY!!