Need Bees Removed?
International
Beekeeping Forums
August 20, 2014, 05:14:11 AM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
News: ATTENTION ALL NEW MEMBERS
PLEASE READ THIS OR YOUR ACCOUNT MAY BE DELETED - CLICK HERE
 
   Home   Help Search Calendar bee removal Login Register Chat  

Pages: [1]   Go Down
  Print  
Author Topic: Mite eruption late fall - change in brood rearing?  (Read 861 times)
JWChesnut
House Bee
**
Offline Offline

Posts: 230

Location: Coastal Central California


« on: November 10, 2011, 06:12:52 PM »

After a pleasant summer with virtually no varroa, mites erupted in my hives in October.  Drones had been ejected before the outbreak.  I live in coastal California and temps encourage forage activity through the fall, though the nectar in the brown hills doesn't really support any surplus.  Dwarf Wing Virus really devastated some hives-- in fact the DWV seems more severe than the relatively mild mite counts.

Have others observed a sudden peak in mites and especially DWV in the period when hives have ejected their drones and converted to a winter brood pattern?

I know varroa follows an epidemic doubling pattern, but the summer counts didn't seem to build-- and were lower to non-existent in August-September than May.   I'm supposing that winter brood may take a day or two longer to hatch and the extra time might push the mite and DWV infection, or the absence of drones might concentrate mites on the winter brood.

I drizzled 3.2% Oxalic in 50:50 syrup today.  I was waiting for the "winter cluster" but on the coast that occurs only sporadically in December.  Couldn't put off treatment and still expect to have survival.
Logged
buzzbee
Ken
Administrator
Galactic Bee
*******
Offline Offline

Gender: Male
Posts: 5433


Location: North Central PA


WWW
« Reply #1 on: November 11, 2011, 06:58:59 AM »

When the brood break comes,the varroa move out of the capped cells and onto the host.It makes the mite more susceptible to treatment.If your bees have little brood at this time,it is a good time to treat with oxalic.The treatments now actually are helping the health of the hive for next winter.
Logged
Michael Bush
Universal Bee
*******
Offline Offline

Gender: Male
Posts: 13622


Location: Nehawka, NE


WWW
« Reply #2 on: November 11, 2011, 10:06:40 AM »

It always seemed that the explosion of the Varroa population in the fall was more than I could account for by just all of the mites having no brood to hide in anymore.  But there is also robbing and bringing back those mites.  I had never thought of a longer brood cycle because of colder weather, but that  might be something to consider.
Logged

Michael Bush
My website:  bushfarms.com/bees.htm
My book:  ThePracticalBeekeeper.com
-------------------
"Everything works if you let it."--Rick Nielsen
rdy-b
Super Bee
*****
Offline Offline

Posts: 2210


Location: clayton ca


« Reply #3 on: November 12, 2011, 12:55:49 AM »

  when was your last treatment -before this one-the time between treatments
 has more impact on threshold limits than the season in my location-your bees should
 have plenty brood at this time-that means mites under the cap-RDY-B
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Beemaster's Beekeeping Ring
Previous | Home | Join | Random | Next
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2013, Simple Machines | Sitemap Valid XHTML 1.0! Valid CSS!
Page created in 0.261 seconds with 21 queries.

Google visited last this page August 08, 2014, 11:11:57 PM
anything