1. Laboratory of Aphidology, Department of Experimental Ecology, Institute of Entomology, Biology Centre, Academy of Sciences of the Czech Republic, Branišovská 31, 37005 České Budějovice, Czech Republic
2. Department of Plant Protection, College of Agriculture, University of Zabol, P.O. Box 98615-538,1, R., Iran
3. Institute of Zoology, Faculty of Biology, University of Belgrade, Studentski trg 16, 11000, Belgrade, Serbia
4. Hymenoptera Institute, Department of Entomology, University of Kentucky, Agricultural Science Center North, Lexington, KY 40546-0091