Original title: Tolérance pour les abeilles de différents traitements hivernaux contre Varroa. In 2 consecutive years, infested colonies were treated in Aug. or Sept. with formic acid, and then in late Nov. with one of the 3 test treatments (Perizin, a.i. coumaphos, oxalic acid applied by spraying or feeding). A single treatment at the correct dosage was tolerated well by the colonies, and spring development was unaffected. There were no significant differences in efficacy of the 3 treatments. Feeding with oxalic acid was the least labour-intensive. Accession date: 18 May 2004. Call number: 638.155/158. Library code: Bj. Language: Fr. P Walker. Author address: Centre de recherches apicoles, Agroscope Liebefeld-Posieux (ALP), 3003 Berne, Switzerland. Apicultural Abstracts from IBRA: AA1121/04