Fries, I. 1989. Short-Interval Treatments with Formic Acid for Control of Varroa
jacobsoni in Honey Bee (Apis mellifera) Colonies in Cold Climates.
Swedish J. agric. Res. 19: 213-216.
Authors address: Swedish University of Agricultural Sciences
Bee Division
Box 7024
S-750 07 Uppsala
Sweden
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