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· import decade: 1870 · 1880 · 1890 · 1900 · 1910 · 1920 · 1930 · 1940 · 1950 · 1960 · 1970 · 1980 · 1990 · 2000 · 2010
Biological control agents imported in the 1950s
Achrysocharoides splendens (Hymenoptera: Eulophidae)
Apanteles circumscriptus (Hymenoptera: Braconidae) = Pholetesor circumscriptus
Aphytis diaspidis (Hymenoptera: Aphelinidae)
Bracon osculator (Hymenoptera: Braconidae)
Cercospora eupatorii (Capnodiales: Mycosphaerellaceae)
Diadegma majalis (Hymenoptera: Ichneumonidae) = Diadegma majale
Diadegma sp. (Hymenoptera: Ichneumonidae)
Encarsia perniciosi California strain (Hymenoptera: Aphelinidae)
Encarsia perniciosi Russian strain (Hymenoptera: Aphelinidae)
Gelis ?areator (Hymenoptera: Ichneumonidae)
Gelis areator (Hymenoptera: Ichneumonidae)
Gelis tonus (Hymenoptera: Ichneumonidae)
Itoplectis maculator (Hymenoptera: Ichneumonidae)
Pachylister chinensis (Coleoptera: Histeridae)
Pristomerus orbitalis (Hymenoptera: Ichneumonidae)
Procecidochares utilis (Diptera: Tephritidae), Mexican devil weed gall fly
Pteromalus semotus (Hymenoptera: Pteromalidae)
Rhagigaster unicololor lyelli (Hymenoptera: Tiphiidae)
Scambus brevicornis (Hymenoptera: Ichneumonidae)
Steinernema glaseri (Rhabditida)
Thynnoides senilis (Hymenoptera: Tiphiidae)
