Blümel, S. & H. Hausdorf, 2002b: Results of quality control tests with Phytoseiulus persimilis, Neoseiulus cucumeris and Orius laevigatus in Austria. IOBC/WPRS Bulletin 25(1), 17-20. Blümel, S., Walzer, A. & H. Hausdorf 2002: Successive release of Neoseiulus californicus McGregor and Phytoseiulus persimilis A.H. (Acari, Phytoseiidae) for sustainable biological control of spider mites in greenhouse cut roses Interim results of a two years study in a commercial nursery. IOBC/WPRS Bulletin 25(1), 21-24. S. Blümel & Walzer, A., 2002: Efficacy of different release strategies of Neoseiulus californicus McGregor and Phytoseiulus persimilis Athias Henriot (Acari: Phytoseiidae) for the control of two-spotted spider mite (Tetranychus urticae Koch) on greenhouse cut roses. Systematic & Applied Acarology, 7, 35-48. Blümel, S., Bakker, F.M., Baier, B., Brown, K., Candolfi, M.P., Goßmann,A.; Grimm, C., Jäckel, B., Nienstedt, K., Schirra, K.L., Ufer, A. and Waltersdorfer, A. 2000: Laboratory residual contact test with the predatory mite Typhlodromus pyri Scheuten (Acari: Phytoseiidae) for regulatory testing of plant protection products. In Candolfi, M., S. Blümel & R. Forster (eds.) Guidelines to evaluate side-effects of plant protection products to terrestrial non-target arthropods -Joint Initiative of IOBC, BART and EPPO. IOBC/WPRS Bulletin pp. 121-144. Blümel, S., Aldershof, S., Bakker, F.M., Baier, B., Boller, E., Brown, K., Bylemans, D., Candolfi, M.P., Huber, B., Linder, C., Louis, F., Müther, J., Nienstedt, K., Oberwalder, C., Reber, B., Schirra, K.L., Ufer, A. and Vogt, G. 2000: Guidance document to detect side effects of plant protection products on predatory mites (Acari: Phytoseiidae) under field conditions: vineyards and orchards. In Candolfi, M., S. Blümel & R. Forster (eds.) Guidelines to evaluate side-effects of plant protection products to terrestrial non-target arthropods -Joint Initiative of IOBC, BART and EPPO. IOBC/WPRS Bulletin pp. 145-158. Blümel, S. C. Pertl & F.M. Bakker, 2000: Comparative trials on the effects of two fungicides on a predatory mite in the laboratory and in the field. Entomologia Experimentalis et Applicata, 97: 321-330. Blümel, S. & C. Pertl, 1999: Comparative trials with Parathion 20EC on the suitability of two test methods to evaluate the side-effects of pesticides on Typhlodromus pyri Scheuten (Acarina: Phytoseiidae). Journal of Plant Diseases and Protection, 106, (4), 380-386. Blümel, S., 2003: Biological control of aphids in greenhouses. Chapter 12, in: Heinz, K.M., R. van Driesche and M.P.Parrella (eds.): Biological Control of Arthropod Pests in Protected Culture. Ball Publishing, USA. Blümel, S. , G. Matthews, A.Grinstein and Y. Elad, 2000: Pesticides in IPM: Selectivity, Application, Side Effects and Resistance Problems. Chapter 11, in: Albajes, R., L. Gullino. J.C. van Lenteren and Y. Elad (eds.): Integrated Pest and Disease Management in Greenhouse Crops. Kluwer Academic Publishers. Dordrecht. The Netherlands.150-167. Blümel, S. & K. Russ, 1989: Fruit Flies: Biology, Natural enemies and Control. Vol. 3b Ed. W. Helle. Elsevier Publishers, Chapter 9.6. Genetic Control. 387-389.