Should frames / comb be replaced after treating and if so what % of frames  
/ comb should be replaced?  Also, should you requeen with non-treated  
queens after treating?
 
 
Keith Delaplane's article in the March 2014 ABJ indicated:
 
50% replacement is too much since it has a 30.7% colony over winter  loss.  
A 10% replacement is reasonable; this  is one to two  frames a year.  A 10% 
comb replacement  strategy had  a  21% colony over winter loss.  A normal 
honeybee colony survives about  5-6 years in the wild.  Colonies housed on 
new comb produced more brood and  heavier bees, but brood survivorship was 
better on old combs.  

 
 
However:
Some in-hive chemicals / treatments and mixtures are toxic to  your bees.  
The treatment progression is selecting Varroa tolerant bees,  IPM, soft 
chemicals, hard chemicals.  However, you should requeen  with non-treated queens 
after treating since some chemicals kill sperm /  eggs in the queens / 
drones (Rangle's research in Texas).  Often the old  queen is superceded or 
replaced after treating.
 
David E.  MacFawn
205 Ridgecreek Drive
Lexington, SC  29072
803-957-8897
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