There has been much discussion, research, scientific studies and
wishing, since the dreaded varroa has attacked and done so much damage.
Several discussions have mentioned the mites building up resistance to
the medication, some saying it is because of improper use. Is it worse
to use too little for to short a time or to leave the strips on too
long? If a few mites are still in the hive when the strips are removed,
it seems to me that they might be the ones building up the resistance. I
know someone(he is smarter than I am, so telling him is out) that only
uses his bees for polination and therefore leaves his strips on all the
time. If all the mites are dead and there are none in the hive to become
resistant, why not leave them there?
 
Comments appreciated.
 
I personally follow the instructions and treat twice yearly.
 
Don
 
PS I went out to treat my hives last week and couldn't find the bees. I
believe they were playing "hive and seek" with me.