Why have I no Varroa?

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Tigger

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Since July 2022 I haven't seen any varroa, despite have boards on a few times.
I've had them on again for the last week but still I can't see any.
Three swarms arrived here early this summer and even they have none.

Is this unusual? Why might it be?

Thanks.
 

Erichalfbee

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Since July 2022 I haven't seen any varroa, despite have boards on a few times.
I've had them on again for the last week but still I can't see any.
Three swarms arrived here early this summer and even they have none.

Is this unusual? Why might it be?

Thanks.
You need to do an accelerated drop with a vape or a sugar roll. Natural drop is of little use in monitoring infestation accurately
 

ericbeaumont

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I can't see any
Boards are an unreliable indicator of infestation as insects may remove dead varroa.

Familiarise yourself with the size & shape of varroa before assuming your colonies have none. Trust me, they do.

Did you coat the board with a film of cooking oil?
 

jenkinsbrynmair

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Too many - but not nearly enough
Since July 2022 I haven't seen any varroa, despite have boards on a few times.
I've had them on again for the last week but still I can't see any.
Three swarms arrived here early this summer and even they have none.

Is this unusual? Why might it be?

Thanks.
It's a strange phenomenon


called wishful thinking
 

pargyle

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There's a lot of reasons for colonies with low level mite infestation - location, local climates, proximity of colones with mites, foraging area and your bees, You COULD have low level infestation which may not show up on the inspecion board- but, if there are varroa in the area - the likelihood is that there will be varroa in your colonies.

You really need to do a proper test to be sure - a sugar roll or an accelerated drop with an OA Vape.
 

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