Free Access
Issue |
Apidologie
Volume 30, Number 4, 1999
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Page(s) | 289 - 292 | |
DOI | https://doi.org/10.1051/apido:19990404 |
Apidologie 30 (1999) 289-292
DOI: 10.1051/apido:19990404
a Centro Apícola Regional, Servicio de Investigación Agraria de Castilla-La Mancha, Marchamalo, Guadalajara, Spain
b Dpto. Patología Animal I (Sanidad Animal), Facultad de Veterinaria, Universidad Complutense de Madrid, Avda Puerta de Hierro s/n, 28040 Madrid, Spain
Key words: Apis mellifera / Varroa jacobsoni / oxalic acid / brood development
DOI: 10.1051/apido:19990404
Negative long-term effects on bee colonies treated with oxalic acid against Varroa jacobsoni Oud.
Mariano Higesa, Aránzazu Meanab, Miguel Suáreza and Jesús Llorenteaa Centro Apícola Regional, Servicio de Investigación Agraria de Castilla-La Mancha, Marchamalo, Guadalajara, Spain
b Dpto. Patología Animal I (Sanidad Animal), Facultad de Veterinaria, Universidad Complutense de Madrid, Avda Puerta de Hierro s/n, 28040 Madrid, Spain
Abstract - Two oxalic acid treatments were given to five colonies in autumn and five colonies in spring. In each treatment, colonies were treated every 7 days for 4 weeks with a 3 % sprayed oxalic acid. Another five colonies in each season served as controls and were sprayed only with water. Efficacy of oxalic acid in autumn was 94 % and in spring was 73 %. A long-term study of the colonies for 3-4 months after the last application of oxalic acid showed a statistically significant negative effect of the acid on brood development. In addition, three queens died in the treated colonies. © Inra/DIB/AGIB/Elsevier, Paris
Key words: Apis mellifera / Varroa jacobsoni / oxalic acid / brood development