OA. How much mite drop do you get?

[jenkinsbrynmair]

Are folks using 2+g

yes. Proper scientific study that the optimum amount of OA was 2.25g, and even larger quantities didn't compromise the bees

 

[Erichalfbee]

Are folks using 2+g of OAV as this study found

3.5 for 14x12
4 for double ( I have one with a nadired brood which was full of honey)

 

[The Poot]

Are folks using 2+g of OAV as this study found x7 OAV at 5 day intervals using 1g of OA didn’t reduce mite levels when brood was present

Yes, I use two grams on double brood colonies X (usually) five vapes; but sometimes more vapes are necessary.

 

[Erichalfbee]

Are folks using 2+g of OAV as this study found x7 OAV at 5 day intervals using 1g of OA didn’t reduce mite levels when brood was present

What does “vaporised with 1g/super” mean do you think?

 

[Curly green finger's]

Well I’m using 3g per single brood colony - to compensate for vaper loss which there is.
Nucs 3g and double brood get 2 vapes.
I’ve never vaped more than 3/4 times @ 5 day intervals

 

[Sutty]

I've been using 2g for all sizes, nucs to double brood.
I'm thinking I should go higher, at least for the bigger ones.

 

[JamezF]

three at five day intervals and then the last four days

I am familiar with the five day intervals bit, but by "the last four days" do you mean a four-day interval for a fourth vape?

James

 

[jenkinsbrynmair]

I am familiar with the five day intervals bit, but by "the last four days" do you mean a four-day interval for a fourth vape?

James

yes

 

[Anduril]

Are folks using 2+g of OAV as this study found x7 OAV at 5 day intervals using 1g of OA didn’t reduce mite levels when brood was present

Look at Bob Binnie's YouTube videos or https://beekeepingforum.co.uk/threads/aficionados-of-oxalic-sublimation.51127/
1g In the US, 2.3g in Europe, from the videos 1g is useless.

 

[JamezF]

1g In the US, 2.3g in Europe, from the videos 1g is useless.

Perhaps that's why it's ok to vape with supers on in the US?

James

 

[Anduril]

Perhaps that's why it's ok to vape with supers on in the US?

James

I believe the unregulated trials were using higher doses without any ill effect.

 

[jenkinsbrynmair]

LASI found that even the highest doses (well in excess of 2.2g) had no ill effect on the bees, using syrup as a delivery method (as in trickling) could have a negative effect as the bees ingested much of the OA as they were cleaning the syrup off themselves - no big deal for a worker bee with her limited lifespan, but a queen, subjected to multiple doses it's a different matter which is where the 'once a year' recommendation for all oxy delivery methods (api bioxial, oxybee et al) came into effect. Another example of not letting common sense and logic get in the way.

 

[JamezF]

a queen, subjected to multiple doses it's a different matter which is where the 'once a year' recommendation for all oxy delivery methods (api bioxial, oxybee et al) came into effect.

AFAIR the instructions for ApiBioxal say "dribbling" can be done twice a year, but vaping only once.

James

 

[pargyle]

AFAIR the instructions for ApiBioxal say "dribbling" can be done twice a year, but vaping only once.

James

One wonders at the logic of this ... Do the purveyors of Api-bioxal know nothing about the life cycle of the varroa mite and the interaction with their host species ?

 

[JamezF]

One wonders at the logic of this ... Do the purveyors of Api-bioxal know nothing about the life cycle of the varroa mite and the interaction with their host species ?

I've always imagined it has nothing to do with that and everything to do with what they thought they could get the VMD to accept.

James

 

[jenkinsbrynmair]

AFAIR the instructions for ApiBioxal say "dribbling" can be done twice a year, but vaping only once.

James

exactly - that's how cocked up the whole thing is

 

[jenkinsbrynmair]

One wonders at the logic of this ... Do the purveyors of Api-bioxal know nothing about the life cycle of the varroa mite and the interaction with their host species ?

all they wanted to do was corner the market and ensure beekeepers couldn't use generic OA - it wouldn't surprise me in the least if, in years to come we find out that the BBKA had their sticky little fingers in there somewhere - it would at least explain the total ignorance of the varroa life cycle and the way OA works

 

[Erichalfbee]

One wonders at the logic of this ... Do the purveyors of Api-bioxal know nothing about the life cycle of the varroa mite and the interaction with their host species ?

Not just makers of Apibioxal
Making regulations without understanding the ramifications seems to be quite common the last 100 days, especially

 

[ericbeaumont]

in years to come we find out that the BBKA had their sticky little fingers in there somewhere

As I recall, the BBKA did support the VMD legislation.