Biological control of the blue gum psyllid proves economically beneficial
AuthorsDonald L. Dahlsten
Evan P. Hansen
Robert L. Zuparko
Richard B. Norgaard
Authors AffiliationsD.L. Dahlsten is Professor College Of Natural Resources, Center for Biological Control UC Berkeley; E.P. Hansen is a graduate student, Energy and Resources Group UC Berkeley; R. L. Zuparko is Postgraduate Researcher, College Of Natural Resources, Center for Biological Control UC Berkeley; R.B. Norgaard is Professor, Department of Agricultural and Resource Group, UC Berkeley.
Hilgardia 52(1):35-40. DOI:10.3733/ca.v052n01p35. January 1998.
In 1992 a parasitoid native to Australia was introduced into California in a biological control program directed against the blue gum psyllid from Australia. Interviews with baby blue gum eucalyptus growers indicate that this program has had a benefit-cost ratio ranging from at least 9:1 to 24:1, based solely on the reduction of insecticide treatments. Additional economic benefits, including greater foliage yield, possible reduced environmental and health effects, and avoided pesticide resistance, were not calculated, but would further increase this ratio.
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Parasitoid wasp controls blue gum psyllid