Author Topic: Oxalic Acid 2022  (Read 5652 times)

0 Members and 1 Guest are viewing this topic.

Offline RAST

  • Senior Member
  • ***
  • Posts: 309
  • Thanked: 46 times
  • Gender: Male
  • Location: MASCOTTE AND CHASSAHOWITZKA FL.
Re: Oxalic Acid 2022
« Reply #20 on: May 26, 2022, 08:21:58 pm »
In my limited experience, I can't recall any one getting in trouble (fined) for anything.

Offline Jen

  • Platinum Member
  • *****
  • Posts: 10175
  • Thanked: 240 times
  • Gender: Female
  • Location: Upper California
Re: Oxalic Acid 2022
« Reply #21 on: May 27, 2022, 12:11:20 am »
Onward. Been researching any new info online re OA and mite resistance.

It seems that the jury is still out on using OA solely for mite control through the extent of our beekeeping years, saying that we should be alternating treatments in spring and fall each year. However, it is leaning more to the positive side of the mites Not getting resistant to OA.

Randy Oliver, Scientific Beekeeping ~ https://scientificbeekeeping.com/varroa-management/varroa-ipm-strategies/

Development Of Resistant Mites
I’m often asked the question; won’t varroa develop some degree of resistance to oxalic acid?  The biological answer is that one would certainly expect so if oxalic acid were applied over many generations without rotation of treatments.  But that does not appear to be the case.  In a recent study, Dr. Matías Maggi [[15]] compared the susceptibility to oxalic acid between two Argentinian mite populations:

    1. One that had been exposed to 64 consecutive treatments of oxalic acid dribble (8 times a year for 8 years) as the sole mite treatment, vs.

    2. A control population that had never been exposed to beekeeper-applied organic acids (the beekeeper had used coumaphos, flumethrin, or amitraz in a rotation scheme).
He found that the oxalic-exposed mite population didn’t exhibit any sign of resistance—in fact, it surprisingly appeared to actually be more susceptible to oxalic than the oxalic-naïve population.  This is good news, since it suggests that whatever the mode of action of oxalic acid is against mites, that it’s not easy for them to develop resistance.



There Is Peace In The Queendom

Offline LazyBkpr

  • Global Moderator
  • Gold Member
  • *******
  • Posts: 6842
  • Thanked: 205 times
  • Gender: Male
  • www.outyard.net
    • The Outyard
  • Location: Richland Iowa
Re: Oxalic Acid 2022
« Reply #22 on: May 27, 2022, 08:39:07 pm »
Good to hear that corroborated! Thank you Jen!
Drinking RUM before noon makes you a PIRATE not an alcoholic!

*Sponsor*

Offline Gypsi

  • Regular Member
  • **
  • Posts: 82
  • Thanked: 20 times
  • Gender: Female
  • Fishkeeper first, beekeeper second
  • Location: Fort Worth, TX
Re: Oxalic Acid 2022
« Reply #23 on: January 03, 2023, 02:06:51 pm »
I have the Varrox but I just modified a primer can and put it inside, used a pen tube for an injector outside the other side, and JBwelded it closed. Wearing my mask, wish me luck
Fishkeeper first, beekeeper second

Offline LazyBkpr

  • Global Moderator
  • Gold Member
  • *******
  • Posts: 6842
  • Thanked: 205 times
  • Gender: Male
  • www.outyard.net
    • The Outyard
  • Location: Richland Iowa
Re: Oxalic Acid 2022
« Reply #24 on: January 09, 2023, 09:39:20 am »
ANNNNND??????
                            :)
Drinking RUM before noon makes you a PIRATE not an alcoholic!

*Sponsor*

Offline Gypsi

  • Regular Member
  • **
  • Posts: 82
  • Thanked: 20 times
  • Gender: Female
  • Fishkeeper first, beekeeper second
  • Location: Fort Worth, TX
Re: Oxalic Acid 2022
« Reply #25 on: May 11, 2024, 08:31:05 am »
and I treated once then sold all my bees. Now I wouldn't mind catching a swarm, there will be a mesquite flow soon.
Fishkeeper first, beekeeper second