Greg Rogers part 3 of 4 - Oxalic Acid Vaporization Treatment for Bees with a ProVap 110
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- เผยแพร่เมื่อ 5 ก.พ. 2025
- A demonstration of oxalic acid vaporization for Varroa Mites using a Pro Vap 110 and a discussion about dosage and outside influences.
Bob, can you tell me why when I do my oxalic acid treatments many bees are coming out the doorway after uncovering them and looking pretty bad sick walking right off the Bottom board and dieing. I'm only using half a teaspoon for 2 deep boxes. I keep them sealed up for 10 minutes and uncover just like the instructions say but each time it seems like the bees are getting blasted and killing several. I'm using the same applicator as in the video. Please help... thanks
With vaporization we rarely have damage to our bees and I think it's the same with Greg. Withe the dribble method it's a different matter. Perhaps your vaporizer is running too hot. Another possible problem could be if thymol or other ethereal oils were recently applied. Oxalic acid has been shown to have a significant toxic synergistic reaction with these if they are present. The good news is that they decrease rapidly, do not leave a significant residue behind, and are only a problem with oxalic acid if freshly applied. Another theory of mine is that if you have a very heavy mite load, could the freshly applied oxalic acid aggravate open wounds or mite bites on some of the bees?
@@bobbinnie9872 Just wanted to say Thank you so much for taking the time to answer my question. Just a bit more information I have vaporized multiple times and end up with the same result and even went to and went to try a different oxalic acid thinking maybe that was the issue but I had the same results. I reached out to Larry where I purchased the vaporizer and he was at a loss as well as we went over the criteria of the amount of product used, the vaporizer heating to 230ﾟ. I just don't know what to do, I don't want to keep killing bees obviously counterproductive. I know you're probably extremely busy but was wondering if it would be possible to have a phone conversation to maybe get to the bottom of what's happening?
@@lakeviewlawncarelandscapej1901 Our store number is 706 782 6722. Just ask if I'm there.
Did you ever come to a conclusion? Im having the same problem. One hive has took a very hard hit and not sure they will make it through the winter now. I used apigaurd in September and fed heavily with essential oils all spring and summer to build a package into 3 double deeps. In the fall I used 1/2 teaspoon of bleach/gal in sugar water to keep it from fermenting. May its a reaction to the bleach? Haven't fed in about 5-6 weeks.
Not good to seal them completely, must have a little room to fly out when they get covered with acid. I stopped covering mine when I saw they get covered with acid. I've been using 4 grams and it works great. read my notes near yours and you'll see why.
Bob, thanks for another great series of videos. I’ve definitely picked up some ideas to help me out from these videos.
A series of excellent videos ...
I respectfully greet Adrian
Mulțumesc
No matter how I measure it, 1/4 teaspoon yields about 2.5 grams of oxalic acid crystals. I see 1/4 tsp = 1 gram in a number of places.
We place the tub of oxalic, caps and spoon on a tray and move it pallet to pallet rather than fiddle with all of the items separately. Over the course of a day it saves a lot of time and steps.
Thank you for the information on the pro vap and what kind to get depending on where you treat. Also, the sock is a great idea. As the socks get holes just throw them in the oxalic acid bucket. The amount of oxalic acid is also good news. If I give a little too much it won't bother me so much.
As for mite and beekeepers near you, same issue with me. I've tried getting our bee club to all treat within a ten day period in summer. With covid that idea was washed to the side.
Highly interesting video. Thank You! Best regards, Kai the bee filmer from Kiel (Germany).
Good information, thanks Bob!
Thanks for sharing interesting and valuable content Bob 👍🇺🇲
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Thank you Bob is always great
LOL! Love seeing another use sox. I clean out my sox drawer. I also dampen them if it's windy.
Thanks guys for the great information. going to treat Bees today!!!!!!!!!!!!!!
Încă un film foarte bun . Va multumesc pentru tot dar mai ales pentru prezentarea dozajelor . La noi în România nu se folosește atât de mult oxalicul sublimat și nici surse asa sigure de unde sa te informezi. Va doresc tot binele din lume și va apreciez foarte mult.
Thanks for sharing
Oh, and Merry Christmas
Thank you and the same to you.
Thanks for the walkthrough. Any chance you can review how to update the temperature? I’m trying to figure it out but it’s not been successful. I didn’t see a user’s manual in the packaging when I recently received it in the mail.
Thank you!
Great video as always Bob! Thanks for taking the time to share these different approaches. #bethelighthouss
Thanks Greg. Looking forward to seeing you in January.
@@bobbinnie9872 looking forward to seeing Bob Binnie and The Blue Ridge All-Stars! I hear the whole gang will be there. Can’t wait!
Hello Bob. I'm doing oxalic acid vaporizeration treatments today. With the pro vap 110. The bees here in Central Virginia. On average have at the moment have like a dozen or so capped cells. The high for today is supposed to be in the low 50's f. This will be my second treatment. I'm undecided on a third treatment.
Two may be ample. Greg and I have both decided to do three.
Thanks for sharing Bob. I have enjoyed your videos, the Oxalic Acid effectiveness and such. As Beeks, having all of this information available is great. I’ll be at Kamon conference as well, look forward to possibly meeting you.
Please introduce yourself if you're able. Thanks.
@@bobbinnie9872 I definitely will.
Hey bob just wondering if Greg would be coming to hive life conference , seem to be a person I’d love to meet ! Thanks for all great info !!
I don't believe he's going to make it.
Bob- Does OAV kill open brood?
Not that I'm aware of.
Uzbekiston asalomu alaykum xelov
Best time to fog is mid Jan or Feb when it hits 55 f or above. No babies or near no Babies. However is also fog early spring 2 times as backup then 2 times first week of Aug. because queen is making winter bees, also space fogging 10 days or more for new emerged bees. 2 times in Dec. at 55 F if possible. The University for bee in Florida says use 4 grams of acid to do a complete job. That is all they do is experiment to see what works. I've been using 4 grams going on 2 years and my inspector found zero mites in my hive this past 6/7/22. I use my own fogger I invented=a propane copper fogger that takes 2 minutes the first hive then about 1 1/2 minutes after it warms up. I drill a 3/8 hole in back my hive to place the 3/8 tube into. My fogger is sold for $ 115.00 including shipping. My front slot remains less than 1/4 inch year round to keep mice and the large killer bee from the hive. in other words my entrance is just big enough for the bees to inter. Very little acid comes out that slot, but the bees covered with acid can get out. I have been seeing to many massive killer wasp in Ohio lately. In heavy flow I remove taped up extra holes I've made in each box except the suppers. I hope to buy one of Bob's queens.
Thanks for your videos Bob, were you sayin you all use 1 tsp per box deep, or 1 tsp per 2 boxes ? It looked like he was using 1 per hive instead of 2
Never mind I just rewatched the video my math was off
Question for Bob or Greg. Why do you treat from the bottom board instead of the top of the hive. As the gas fills the top of the hive wouldn't it have a tendency to drift down as it re-solidifies. Would it provide better coverage?
My guess is that it would work fine from the top. For me the bottom is more convenient.
@@bobbinnie9872 Thanks Bob
@bob binnie
Do you think there is something to the Caucasian honey bees having better defense against Varroa due to the higher levels of propolis containing phenol?
I'm not familiar with any research pointing towards that specifically but there is research showing that it helps with many other issues. Search the name "Marla Spivak" at the University of Minnesota for her work on propolis.
Hello Bob, do you have an update on the research from University of Georgia on Oxalic Acid
Hi Robert. I do and I have been trying to get together with Jennifer to provide it in an interview. There have been many setbacks with that but we hope to do that soon. Thanks.
i use a 750w inverter on my truck 12v battery, and 2 grams per deep treated 5 x 5 dsys apart, and if had 50°f days, a power cord for hives closer to house
Hello Bob, Can you tell me what type of wire Greg used for hid mouse guards? What do you use? Thank you!
1/2 inch Hardware cloth.
Great👏👏
I set strips after last honey pull. Before i shed i do OA 2 times 4 to 5 days apart and 3 maybe. when i unshed in spring i will set strips and pull them before i set supers on
Sounds like a 1, 2, 3 punch.👍
Can you treat with oxalic while you still have apivar strips inside the hive?
I'm not an expert on the level of synergistic action between these two compounds so I would hesitate to say but know that there will be some sort of synergistic action.
Hi Bob from Greece. I work the machine at 280 ° C. It has much better results.
Thank you.
im using johnos easy vap tube is on top,works great
Pinned, I never completely seal mine up and they get white acid on the but fly around blowing the dust off. None die.
Mr Bob. How many days apart do you treat with oxalic
We're treating about 10 to 14 days apart. this winter.
Ha B ob love your videos, I have a generator as well and i had a power surge and burnt up my vap.. it was a lordbees vap bob I have ordered some kind of surge protector for the generator have you ever had this problem and do u have any ideas what to do also I am missing the window to treat 2-3 times in Dec do you treat in January I have a new vap coming but i do not know when i am going to recieve it thanks again for all your videos they are great I can sit and watch you for hours Oh yea who is the person that the this vap came from. in the video Thanks and have a blessed week
Hi Frances. This tool was ordered from OxaVap. oxavap.com/
We have never had a generator surge problem so couldn't advise on that. I would continue to treat when your tool arrives even it seems a bit late.
@@bobbinnie9872 Thank You Bob
Hi Bob, if your flow was in mid July to mid August at what time would you be splitting and swarm managing?
Our sourwood nectar flow is July ending by August 1 and we make honey with splits started in late April and early May. We also feed if there isn't a flow to make sure they grow to be ready on time.
@@bobbinnie9872 thanks for everything that you are doing, I have no one in my area who is willing to teach the art, but because of you and kaymon I am growing very rapidly. You have no idea how much of an impact that you are having in people's lives, technically you gave me a way to feed my family. Taking the time off to reply to my text, I am responding and there is almost tears in my eyes
@@bobbinnie9872 do you start queen rearing in late may as well or slightly earlier?
@@dominicanbeekeeper6686 We start in early April if we have the time. Last year we so busy we didn't start until early May.
Odd question; do the train tracks behind this bee yard affect your bees? A yard of mine was near a double track used often and the bees were unsettled or left the hive.
Good video.
HBM
HBM
My bees are 475 yards from a very busy track and don’t seam to have any trouble. I never really thought about it but I can see how that would potentially be an issue. How far away is your yard?
I've not ever had bees close to a train track so I can't speak on that. We do have a yard about 100 feet from a 4 lane US highway and they seem to be fine. Thanks.
@@DRIECUTHoney just a stone throw away...
My hives are about 15 feet from the freight line I live next to and they don't seem to care. There's an intersection nearby so they blast the horn a few times as they approach it. Doesn't seem to phase them. Now we have a quiet zone as of this year, so there are no horns 10pm-7am anymore. Hallelujah 😍
@@nancycasler8496 interesting...May I ask about the speed the trains would travel at?
2nd year no treatment until November 21,had 16 mites @430 bees,showing dwv....now im treating,and the sick hive appears to be recovering,time will tell,i will do more washes thru early spring ,summer and pre winter/fall
Good luck.
I use a ProVap110 like Greg’s. I also use a hole in the back of the landing board to apply the OAV. Using a 15/64” bit really helps with sagging. 1/4’ is too loose. Golf tee as a placeholder to prevent it from being propolized shut. I’m currently doing a 4x4 OAV series @ 4g/box.
Ryan, how do you get 4g/box in your cap? Are you using multiple caps per hive all at one time? I don't think I can get over 3 grams per cap.
@@russellkoopman3004
I use a 30mL med cup (I use them at work in the hospital), weigh & pack the dose into the cup, put OA cap on med cup, then flip them & rotate med cup. Dose stays in-place. Can do 10+ grams at a time.
Bob. Your content is very helpful. Many times, i have videos I'd like to share with my Spanish spealing help. Is there any way you could ad the ability for Spanish subtitles. Thanks
I'll look into it. Thanks.
@@bobbinnie9872 你好 可以做一下中文字幕吗
Hello Bob , I have a question not related to this video , Nathan from Duck River Honey interviewed you , interesting content and you mentioned the cost of electricity to do certain things in your building was to costly , how much per KLW is it ,here in Australia I pay 44cents in peak time , summer time I don't have to pay solar cuts in @ 66c feed in , be interested to know , how's the book going ,has 1 started , thanks for your time Peter 🇦🇺 Don't have mites in Australia thank god ,lot of expense and work for you, I will give up bee keeping if they ever get here.
Hi Peter. Your cost is much more than ours which is .16 which is still more costly than heating with natural gas. No book yet. I think I'll have to retire to have enough time. Thanks.
@@bobbinnie9872 Thanks for the reply ,watched the 2nd video from Duck River, that was very interesting especially with septic tanks , floors , and wax , 1 whole chapter in the upcoming book ,65 is retiring age here , and you goodself ????
@@peterlightbody8443 I'm already 68. We'll see.
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Apistan is not organic is it?
No, the active ingredient in Apistan is fluvalinate which is not organic.
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Hi from Germany! Does it really matter how long you close the entrance? Are the any studys? Thanks!
I'm not aware of any studies but most of us feel 10 minutes is good. Longer doesn't seem to matter.
@@bobbinnie9872 Thanks, will do that in the future. I just did 2-4min and some with small entrance not at all. Hope the efficiency was enough. TC
@Rex Roberton It is forbidden because of the user’s safety. Commercial beekeepers do it though because of its effectiveness and compatibility for the bees. You can do the dripple only once so that is one disadvantage and much easier with vaping. Really effective if done several time 👍
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I need to find bee keeper like that to sell my bulk honey to .. I don't have time bee selling it off by the pound. I sell alot buckets nice to find someone just takes it all
"Even at 60 deg I was not seeing that many bees". Must be southern bees!
Yes, it's about southern locations more than southern bees. They fly often enough that they don't have an urgent need every time it warms up a little. I'm sure your bees up north have occasions when they have to get out on any chance they get, even if it's a little on the cool side.
Sorry Mr Bob, but one more question, would Mr Greg be open to receiving questions and if so, how can we get his contact info. Im headed towards my operation being similar in size and am curious about his extracting set up etc
I'll ask about him about contacting when I talk to him next. I do know that he has an 18 frame Cowen extractor and Cowen capping spinner. He uses the smaller extractor because of limited space but I believe he would prefer something a little bigger. He also has several 50 gallon tanks for storage and stores extra in barrels.
Aprivar has been proven worthless by one of the largest bee keepers in Canada. I too lost 28 hives trusting in Aprivar.
I have a neighbor who loses 90% every year. That's 18 hives. Real issue.
Why is there ad after ad on your video with no way to skip? I don't have an hour to sit here.
Sorry, I have not asked for adds like that and it's usually not that way. TH-cam must be making a mistake.
So much for Hawaii. Bees fly 7x52x365. No such thing as broodless, ever.