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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 Often the old queen is superceded or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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