November Bee Lab Varroa and Nosema Results

Bee Informed Partnership   By Rachel Bozarth          December 4, 2014

Although the official start of winter does not begin for a few weeks, bitter cold air has spread across much of the northern region. The Minnesota and Oregon Tech Teams finished up their sampling at the end of October, so the honey bee samples received this month were all from the California team (where they are experiencing 60-70°F weather).

We examined 220 California samples for Varroa and 236 for Nosema. The average value for Varroawas 0.71 mites per 100 bees, and the average value for Nosema was 0.30 millions of spores per bee. Remarkably, these averages are almost exactly the same as the averages for California last month. However, our current disease levels are much lower than they were last year in November 2013.

Graph 1: A comparison of Varroa averages in November 2013 and 2014.Graph 2: A comparison of Nosema averages in November 2013 and 2014.


Graph 1: A comparison of Varroa averages in November 2013 and 2014.

Graph 2: A comparison of Nosema averages in November 2013 and 2014.

Bee Informed Partnership