>Is it [formic acid] somehow doing as much damage as good?
As an aside, I've killed a strong hive with two 4% applications of oxalate (drip, 1:1 syrup) in a single season, and had another abscond with 70 lbs of honey after a fall (broodless) application of Hopguard II. The latter hive had an amitraz treatment the prior spring.
S
Skillman, NJ
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