Syrphids as natural enemies of cereal aphids in Germany: Aspects of their biology and efficacy in different years and regions
- 31 January 1995
- journal article
- Published by Elsevier BV in Agriculture, Ecosystems & Environment
- Vol. 52 (1), 39-43
- https://doi.org/10.1016/0167-8809(94)09007-t