Purple scale control: Imported parasites give promise of ultimate biological control
Paul DeBach, University of California
California Agriculture 7(6):9-10. DOI: 10.3733/ca.v007n06p9.
Paul DeBach is Associate Entomologist in Bioloeical Control, University of California, Riverside;
Not available – first paragraph follows:
Successful biological control of the purple scale in California may be proven in experiments underway in citrus groves in Orange County.
The above progress report is based on Research Project No. 1493