Augmentative releases of entomophagous species in annual cropping systems

John J. Obrycki, Les C. Lewis, David B. Orr

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


Augmentative releases, because of their repetitive nature, are often more expensive and time consuming than importation methods of biological control, and thus have been considered a less desirable approach to biological control. From the view of semipermanent ecosystems, e.g., orchards, this perspective may be appropriate; however, for annually disturbed habitats, periodic releases may be the biological control method of choice. Matching the characteristics of annual cropping systems to appropriate natural enemies would expand the basis for using entomophagous species in augmentative releases. When this approach is used, selection of natural enemies for augmentative releases would move beyond the ability to mass rear entomophagous species. A focus on quality control, enhanced effectiveness of released individuals, and ecological and economic assessment of releases is required to increase the use of augmentative biological control in annual cropping systems. Increased knowledge of the biosystematics and basic biology of entomophagous species is necessary to use these species effectively in augmentation programs.

Original languageEnglish
Pages (from-to)30-36
Number of pages7
JournalBiological Control
Issue number1
StatePublished - Sep 1997

Bibliographical note

Funding Information:
Research summarized in this paper was supported in part by USDA-NRI Grant 90-37250-5537, a grant from the USDA-NBCI, and the Leopold Center for Sustainable Agriculture IPM Issue team. This is Journal Paper J-15449 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa, Project No. 2755.


  • Annual cropping systems
  • Augmentative releases
  • Biological control
  • Entomophagous species

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Insect Science


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