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Reinfestation of apiaries after treatment: a frequent cause of failure in the control of Varroa jacobsoni

, : Reinfestation of apiaries after treatment: a frequent cause of failure in the control of Varroa jacobsoni. Ape Nostra Amica 15(5): 4-5, 7-9

The results of an experiment carried out in NE Italy are given. Ten colonies, initially free of V. jacobsoni, were treated during the course of one year with various long-lasting acaricides. Incoming mites, killed by the treatments, were counted twice per week. Drone excluders were fitted to 5 hives to prevent drones from entering but this did not affect reinfestation.

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