TY - JA AU - Wetzel,T. AU - Freier,B. AU - Reinsch,B. TI - The effect of combined infestation by cereal aphids (Macrosiphum avenae (Fabr.) (Sitobion avenae) and Rhopalosiphum pa di (L.)) and cereal leaf beetles (Oulema melanopus (L.)) on eir population PY - 1983/// KW - Oulema KW - Pest insects KW - Rhopalosiphum KW - Winter crops KW - Triticum KW - AGROVOC KW - Yields N1 - Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0261-2194 T2 - Crop Protection ER -