Varroa map by state.

[van from Arkansas]

[attachment=0][/attachment]

Not real sure about the accuracy due to volunteers reporting data to Univ. Of Maryland.  This data is part of the BeeInformed Partnership: a system of beekeepers, world wide, to share data regarding disease, honey production, flows, etc at zero $ cost.  I have hive sensors that transmit temp, weight, humidity automatically to their site for monitoring.

The white areas are due to no data being reported.

Van

[BeeMaster2]

It looks as if the colder the climate the less mites in the hives.
Jim Altmiller

[CoolBees]

Thanks for posting this Van. Someone needs to send them some more information from California - much higher might counts (than shown) in my experience, as well as with everyone I've talked to here.

California would be shown black in think - unless the bees are heavily treated.

[The15thMember]

Presuming that my sugar rolls are giving me slightly better numbers than reality, I?d say that the NC data is pretty accurate, at least for what I?m seeing in my yard. Queen Hippolyta?s hive had 1 mite per 100 last check, Queen Nakia had none, and Queen Merneith had 2. I have a lot of trouble finding my fourth queen, Queen Elizabeth, so I haven?t been able to test that hive yet. I?ll try again to find her this week. (And yes, I know my queens have weird names, well, except Elizabeth. Beekeeping is the only time I get to name things without having to worry if anyone else can pronounce the name.   )

[HillBilly2]

Mine were all over the board. 38 hives with most around 4, but one 12, one 25, and one 75. Just goes to show you cannot rely on spot checks. The high numbers were not together either.