23 mites per sample-what to do?

# Thread: 23 mites per sample-what to do?

1. Join Date
Jun 2018
Location
orland park
Posts
160

## 23 mites per sample-what to do?

I have taken alcohol mite was sample from areas where is drone and pollen. I mixed bees from three frames to be accurate. To my surprise I counted 23 mites. There is no capped brood because the hive has swarmed and I have collected already honey for myself and left the rest for them. Should I treat now and if so what method is best?

2.

3. ## Re: 23 mites per sample-what to do?

That's like 8%, OAV would kill em all, with no capped brood.

4. msl
Join Date
Sep 2016
Location
Denver Metro Area CO, USA
Posts
1,984

## Re: 23 mites per sample-what to do?

23 broodless per 300 = 11/12 with brood

so 4%, not over run, but time to be treating. Oxalic Acid would be my 1st choice for a broodless and superless hive

5. ## Re: 23 mites per sample-what to do?

I didn't know there was a formula for broodless?
The only formula I have seen is: 23 mites ÷ 300 bees = .076 X 100 = 7.7% (7.7 mites per 100 adult bees)

6. msl
Join Date
Sep 2016
Location
Denver Metro Area CO, USA
Posts
1,984

## Re: 23 mites per sample-what to do?

Research has shown that if you X it by 1.8 you have a number representative of the total infestation when brooded up, rember the bulk of the mites are in the capped brood see Lee Et Al (2010), https://articles.extension.org/media..._mellifera.pdf
Most just 2x it for simplicity

You have to rember a wash gives you the percentage of mites to bees in the brood nest. But its not telling you the advrage mites poric mites in the whole hive (with out more math) the brood nest is a much higher number, and its used as its the most stable and repeatable.

as such its just a number, that the bean counters then correlated with the effect on the hive, then backed it up to come up with thresholds that are predictive of pending economic impacts on the hive.

look at it this way… shooting spitball numbers- A bee lives for about 6 weeks and is a nurse for about 1 week, so most of the phoric mites are on 1/6 of the bees

so if you roll 6% on nurse bees that really means something like 2% phoric and 10.8%(6x1.8) overall infestation(if you have brood). So if you roll 6% with no brood its about 1/2 the over all infestation then if there was brood.

7. Join Date
Sep 2008
Location
Mtn. View, Arkansas, USA
Posts
2,754

## Re: 23 mites per sample-what to do?

dpula2: The easiest method at this time of the year,with hot summer temperatures,is to use Apivar strips. Do a search on YouTube for videos on how to install the strips. You can probably buy small amounts of the strips at local bee supply stores if you have them in your area.

8. Join Date
May 2015
Location
Skaneateles, NY
Posts
942

## Re: 23 mites per sample-what to do?

formic pro. 2 strips per hive.

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