comments on varroa count from last weekend?

[CliffDale]

OK, I have the books that mention varroa count 3 days later.

7 days ago, I did the oxalic treatment. Today I had a look and counted around 5 to 8 dead mites per square inch fallen through the mesh floor.

Is this good or bad?

Cliff

 

[oliver90owner]

At worst case scenario, 2600 mites is awful. Still, better dead than still alive. But still awful as the winter bees will likely already have been infected with disease pathogens. And that is only a 7 day drop!

 

[MJBee]

Bad but not the end of the world. If and it may be a big IF they survive until spring at least this years brood will be relatively varroa free. Keep monitoring, the next 7 days should drop low hundreds and after a month you should be down to less than 1 per day, if the OA has done its job.

I see you have 8 colonies are they all as bad?

 

[MuswellMetro]

bad,,

ok what did you treat them with in autumn, what was the drop then

 

[CliffDale]

They had a month of Apiguard, 2 weeks and replaced with 2nd Apiguard treatment.

Only 2 or 3 mite drop /week per inch.

I thought this was ok.

4 colonies are on solid floor. The others are similar count

Cliff

 

[drstitson]

you should be counting (or estimating) the total drop not per square inch.

 

[beeboybee]

just counted mine 60 over 7 days.....

 

[RoofTops]

They had a month of Apiguard, 2 weeks and replaced with 2nd Apiguard treatment.

When was this - August or September? The treatment does not seem to have been very successful.

 

[Finman]

OK, I have the books that mention varroa count 3 days later.

7 days ago, I did the oxalic treatment. Is this good or bad?

Cliff

IT TAKES ABOUT 2 WEEKS BEFORE YOU SE FINAL RESULT. HALF OF MITES HAVE DROP AFTEN 7 DAYS.

.
Finnish beekeeping specialist Ari Seppälä calculated from Finnish
varroa trickling research following lag time :

After
cure ---- rate of all falled
1 week ---- 54 %
2 week ---- 20 %
3 week -----13 %
4 week ------8 %
5 week ------5 %

A finnish researcher Seppo Korpela has calculated during many years mites' drop

year 2000 altogether 34468 falled mites

1-2 weeks 96%
3-4. weeks 2,4 %

v. 2004 ... 10730 mites:

1-2 weeks 98 %
3-4 weeks 2 %

Y 2005.... 12270 mites

1-2 weeks 96 %
3-4 weeks 4 %