"Weakening, Collapse and Mortality of Bee Colonies"
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"Weakening, collapse and mortality of bee colonies" - November 2008 – 1 Editorial coordinators Ms. Julie Chiron Ms. Anne-Marie Hattenberger Administrative and secretarial assistance Ms. Sheila Gros-Désirs 2 Composition of the working group on "bee colony mortality, collapse and weakening" Chairman Mr. Bernard Toma Contagious diseases Ecole nationale vétérinaire d’Alfort (Alfort National Veterinary School) Working group members Ms. Anne Alix Ecotoxicology and environment Afssa (French Food Safety Agency) Plants and Environment Department (DiVE) Mr. Mike Brown Head of the National Bee Unit, York Laboratory Apiculture Field and advisory services - (United Kingdom) Mr. Patrice Carpentier Biostatistics Afssa (French Food Safety Agency) Plants and Environment Department Ms. Magali Chabert-Ribière Virology, Bee Diseases Unit Afssa (French Food Safety Agency) Sophia-Antipolis Ms. Marie-Pierre Chauzat Bee ecotoxicology, Bee Diseases Unit Afssa (French Food Safety Agency) Sophia-Antipolis Mr. Robert Delorme Toxicology INRA (French National Institute for Agricultural Research) Versailles Mr. Jean-Paul Faucon Bee diseases, Bee Diseases Unit Afssa (French Food Safety Agency) Sophia-Antipolis Mr. Jean-Pierre Ganière Contagious diseases, microbiology, antimicrobial resistance, health regulations Ecole nationale vétérinaire de Nantes (Nantes National Veterinary School) Mr. Laurent Gauthier Virology (bees) Pôle Agro Montpellier (Marseilles National School for Further Agricultural Studies) Mr. Eric Haubruge Entomology Faculty of Food Sciences-University of Gembloux (Belgium) Mr. Franz Jacobs Bee physiology and pathology University of Ghent (Belgium) Mr. Yves Le Conte Invertebrate ecology, bee biology and protection laboratory INRA (French National Institute for Agricultural Research) Avignon 3 Mr. François Moutou General epidemiology, wildlife, risk analysis Afssa Lerpaz (Laboratory for studies and research on animal diseases and zoonoses) Mr. Bach Kim Nguyen Entomology Faculty of Food Sciences-University of Gembloux (Belgium) Mr. Alain Rerat Chairman of the “Bees” working group at the Académie d’Agriculture de France (French Agriculture Academy) Mr. Claude Saegerman Epidemiology and risk analysis applied to veterinary sciences Liège Faculty of Veterinary Science (Belgium) Afssa (French Food Safety Agency) Ms. Julie Chiron Scientific Coordinator Unit for the assessment of food and animal health-related risks (UERASA) Afssa Department for the Evaluation of Nutritional and Health Risks (DERNS) Ms. Anne-Marie Hattenberger Head of the Unit for the assessment of food and animal health-related risks (UERASA) Afssa Department for the Evaluation of Nutritional and Health Risks (DERNS) Mr. Philippe Vannier Director of Animal Health and Welfare (DSABA) Afssa Directorate General 4 Persons consulted Mr. Jean-Marie Barbançon Chairman of FNOSAD (Fédération nationale des organisations sanitaires apicoles départementales - French national federation of départemental [county] bee health organisations) Beekeeper Mr. Raymond Borneck Chairman of the Groupement de défense sanitaire apicole du Jura (Jura region bee health protection group), former chairman of Itapi and Apimondia Beekeeper Ms. Monique Eloit Deputy Director General, Chief Veterinary Officer (DGAl) French Directorate General for Food Mr. Pascal Jourdan Member of the CNDA (Centre national du développement apicole – National Centre for Bee Development) and Head of ADAPI (Association pour le développement de l’apiculture provençale – Association for the development of beekeeping in Provence) Beekeeper Ms. Monique L’Hostis Manager of the inter-school diploma (DIE) in "Beekeeping and bee diseases" for Nantes and Alfort National Veterinary Schools Ecole nationale vétérinaire de Nantes (Nantes National Veterinary School) Mr. Michel Pottiez Regional Director of Veterinary Services for the Haute-Marne (52) Beekeeper Report reviewers Mr. Didier Boisseleau Regional Director of Veterinary Services for Vendée (85) Mr. Patrick Dehaumont Director of the ANMV (French Agency for Veterinary Medicinal Products) Afssa (French Food Safety Agency) Fougères Mr. Gilbert Jolivet Professor in parasitology Honorary Director of Research at INRA (French National Institute for Agricultural Research) Mr. Claude Sarrazin Former Head of the Regional Veterinary Laboratory of Hautes-Alpes (05) Département [county] assistant and lecturer in bee health practice courses and advanced courses for training bee health officers Beekeeper 5 CONTENTS INTRODUCTION .....................................................................................................15 1 LIST OF CAUSES OF BEE COLONY MORTALITY....................................18 1.1 REMINDER OF DEFINITIONS.......................................................................................18 1.1.1 State of normality ....................................................................................................................18 1.1.1.1 Composition of a bee colony ........................................................................................................................18 1.1.1.2 Phases in the development cycle of a bee colony......................................................................................20 1.1.2 States of abnormality...............................................................................................................21 1.1.2.1 Die-off..............................................................................................................................................................21 1.1.2.2 Weakening ......................................................................................................................................................21 1.1.2.3 Colony depopulation......................................................................................................................................23 1.1.2.4 Collapse ..........................................................................................................................................................23 1.1.2.5 Mortality and morbidity..................................................................................................................................23 1.2 CAUSES OF BEE COLONY MORTALITY ....................................................................25 1.2.1 Biological agents .....................................................................................................................25 1.2.2 Chemical agents......................................................................................................................30 1.2.2.1 Conditions of exposure of bees to plant protection products...................................................................30 1.2.2.2 Regulations on the marketing of plant protection products......................................................................32 1.2.2.3 Identified effects of plant protection products on bees .............................................................................33 1.2.3 Environment ............................................................................................................................36 1.2.3.1 Diet ..................................................................................................................................................................36 1.2.3.2 Climatic factors ..............................................................................................................................................41 1.2.3.3 Electric and magnetic fields..........................................................................................................................41 1.2.3.4 Farming practices ..........................................................................................................................................42 1.2.4 Beekeeping practices..............................................................................................................44 1.2.4.1 General points................................................................................................................................................44 1.2.4.2 Swarming........................................................................................................................................................44 1.2.4.3 The colony’s living environment ..................................................................................................................45 1.2.4.4 Feeding ...........................................................................................................................................................45 1.2.4.5 Monitoring and treatment of apiary diseases..............................................................................................45 1.2.4.6 Selecting queens............................................................................................................................................46 1.2.5 Other causes...........................................................................................................................46 2 HEALTH OF THE BEEKEEPING SECTOR.................................................48 2.1 THE EUROPEAN BEEKEEPING SECTOR...................................................................48 2.2 THE FRENCH BEEKEEPING SECTOR ........................................................................50 2.2.1 Characteristics and statistics...................................................................................................50