Free Access Recording the proportion of damaged Varroa jacobsoni Oud. in the debris of honey bee colonies (Apis mellifera) p. 249 Kaspar Bienefeld, Fred Zautke, Denis Pronin and Adil Mazeed DOI: https://doi.org/10.1051/apido:19990401 AbstractPDF (558.1 KB)
Free Access Testing reliability of a potential island mating apiary using DNA microsatellites p. 257 Peter Neumann, Job P. van Praagh, Robin F.A. Moritz and Jost H. Dustmann DOI: https://doi.org/10.1051/apido:19990402 AbstractPDF (974.4 KB)
Free Access Radionuclides and selected elements in soil and honey from Gorski Kotar, Croatia p. 277 Delko Barišić, Astrea Vertačnik, Jerry J. Bromenshenk, Nikola Kezić, Stipe Lulić, Mihovil Hus, Petar Kraljević, ŠMiljenko Šimpraga and Zvonko Seletković DOI: https://doi.org/10.1051/apido:19990403 AbstractPDF (626.7 KB)
Free Access Negative long-term effects on bee colonies treated with oxalic acid against Varroa jacobsoni Oud. p. 289 Mariano Higes, Aránzazu Meana, Miguel Suárez and Jesús Llorente DOI: https://doi.org/10.1051/apido:19990404 AbstractPDF (240.5 KB)
Free Access Nestmate discrimination in the African stingless bee Hypotrigona gribodoi Magretti (Hymenoptera: Apidae) p. 293 Wolfgang H. Kirchner and Richard Friebe DOI: https://doi.org/10.1051/apido:19990405 AbstractPDF (446.3 KB)
Free Access Short-term effects of simulated bad weather conditions upon the behaviour of food-storer honeybees during day and night (Apis mellifera carnica Pollmann) p. 299 Karl Crailsheim, Ulrike Riessberger, Birgit Blaschon, Richard Nowogrodzki and Norbert Hrassnigg DOI: https://doi.org/10.1051/apido:19990406 AbstractPDF (831.1 KB)
Free Access Honeybee queen tergal gland secretion affects ovarian development in caged workers p. 311 Theresa C. Wossler and Robin M. Crewe DOI: https://doi.org/10.1051/apido:19990407 AbstractPDF (664.0 KB)
Free Access Comparative stability of oxytetracycline and tylosin in sugar syrup p. 321 Jan Kochansky, David Knox and Hachiro Shimanuki DOI: https://doi.org/10.1051/apido:19990408 AbstractPDF (392.8 KB)
Free Access Nesting biology of Centris (Hemisiella) vittata Lepeletier in southeastern Brazil (Hymenoptera, Apidae, Centridini) p. 327 Márcio Pereira, Carlos Alberto Garófalo, Evandro Camillo and José Carlos Serrano DOI: https://doi.org/10.1051/apido:19990409 AbstractPDF (1.002 MB)
Free Access Observations on multiple mating flights of Apis dorsata queens p. 339 Nguyen Quang Tan, Makhdzir Mardan, Pham Hong Thai and Phung Huu Chinh DOI: https://doi.org/10.1051/apido:19990410 AbstractPDF (473.8 KB)
Free Access A scientific note on the Phadebas method for honeys with low enzyme content p. 347 Livia Persano Oddo and Patrizio Pulcini DOI: https://doi.org/10.1051/apido:19990411 AbstractPDF (102.8 KB)
Free Access A scientific note on the preparation of high molecular weight DNA from honeybee Apis mellifera L. pupae for PFGE analysis p. 349 Martin Beye, Lore Grohmann, Annette Poch and Carola Burgtorf DOI: https://doi.org/10.1051/apido:19990412 AbstractPDF (191.8 KB)
Free Access A scientific note of an application of isotope ratio mass spectrometry to feeding by the mite, Varroa jacobsoni Oudemans, on the honeybee, Apis mellifera L. p. 351 Judith Principal de D'Aubeterre, David D. Myrold, Lynn A. Royce and Philippe A. Rossignol DOI: https://doi.org/10.1051/apido:19990413 AbstractPDF (129.3 KB)
Free Access A scientific note on the detection of Kashmir bee virus in individual honeybees and Varroa jacobsoni mites p. 353 Akey C.F. Hung and Hachiro Shimanuki DOI: https://doi.org/10.1051/apido:19990414 AbstractPDF (126.8 KB)
Free Access A scientific note on the partial nucleotide sequence of a US strain of Kashmir bee virus isolated from Apis mellifera L. p. 355 Akey C.F. Hung and Hachiro Shimanuki DOI: https://doi.org/10.1051/apido:19990415 AbstractPDF (128.9 KB)