Sublethal effects of oxalic acid on Apis mellifera are hardly investigated. However, permanent damages of the digestive organs of adult workers are described. This can influence the nutrient supply and the feeding behaviour of the bee. In cage-experiments the food ingestion of A. mellifera after a treatment with oxalic acid was investigated ... The treatment with 3.5% OA resulted in sublethal effects on A. mellifera: reduced food ingestion and vitality. The less requirement of food can indcate changes in the metabolism which are also reflected in the low activity. It has to be investigated in further studies whether these results are caused by organ damages or other effects like dehydration or symptoms of poisoning. Sublethal effects of oxalic acid on Apis mellifera: changes in food ingestion. S. Schneider, E. Rademacher (Freie Universität Berlin, Institut für Biologie, Neurobiologie, Königin-Luise-Straße 28/ 30, 14195 Berlin) *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html Guidelines for posting to BEE-L can be found at: http://honeybeeworld.com/bee-l/guidelines.htm