caa a22 4500 469060395 CHVBK 20180323132855.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF01218574 doi (NATIONALLICENCE)springer-10.1007/BF01218574 The removal response of Apis mellifera L. colonies to brood in wax and plastic cells after artificial and natural infestation with Varroa jacobsoni Oud. and to freeze-killed brood [Elektronische Daten] [O. Boecking, W. Drescher] LikeApis cerana colonies,A. mellifera colonies also show removal response toVarroa-infested brood cells. Infested worker brood cells of artificially and naturally infested combs were detected by the worker bees to various degrees in all types of comb-material used. The bees uncap brood cells and remove larvae or pupae infested with one or two mites. The removal response of worker bees was stronger towards brood cells containing two mites than cells with one mite. The specific signals which cause the removal of brood cells infested withVarroa mites are unknown. Removal response toVarroa-infested brood cells in plastic comb-material ("Jenter”-and ANP-comb) was significantly higher than to brood in wax combs. Up to now we do not know to what extent this tolerance mechanism is influenced by genetic and environmental factors. Our experiments comparing the removal of freeze-killed brood with the removal of brood infested withVarroa mites demonstrate positive correlations. Considering the time-consuming method of the artificial infestation with living mites, the hygienic behaviour-including the removal of brood cells infested with mites-of large series of colonies can be tested using freeze-killed brood. Elsevier Science Publishers B.V., 1993 Boecking O. Institut für Landwirtschaftliche Zoologie und Bienenkunde, Melbweg 42, D-5300, Bonn, Germany aut Drescher W. Institut für Landwirtschaftliche Zoologie und Bienenkunde, Melbweg 42, D-5300, Bonn, Germany aut Experimental & Applied Acarology Kluwer Academic Publishers 16/4(1992-12-01), 321-329 0168-8162 16:4<321 1992 16 10493 https://doi.org/10.1007/BF01218574 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01218574 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Boecking O. Institut für Landwirtschaftliche Zoologie und Bienenkunde, Melbweg 42, D-5300, Bonn, Germany aut NATIONALLICENCE 700 1- Drescher W. Institut für Landwirtschaftliche Zoologie und Bienenkunde, Melbweg 42, D-5300, Bonn, Germany aut NATIONALLICENCE 773 0- Experimental & Applied Acarology Kluwer Academic Publishers 16/4(1992-12-01), 321-329 0168-8162 16:4<321 1992 16 10493 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer