University of California

Mass production of egg parasites of the genus Trichogramma


Stanley E. Flanders

Author Affiliations

Stanley E. Flanders was Parasite Collector, Citrus Experiment Station, University of California.

Publication Information

Hilgardia 4(16):465-501. DOI:10.3733/hilg.v04n16p465. June 1930.

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Of the comparatively small number of entomophagous insects whose habits and host relations appear to make them usable in biological control work, the hymenopterous egg-parasite, Trichogramma, has probably received the widest attention. Attempts have been made to utilize it in every phase of biological control, by protection through proper cultural practices, by introduction to establish it in new habitats, and by production in quantities for mass liberations. The liberation of Trichogramma in great numbers may prove to be a practical method for the control of several species of injurious insects.

The following account gives the origin and development of the mass production3 of Trichogramma and the methods of utilizing it.

Trichogramma minutum Riley was used in this work because it is the most common representative of the genus in California. The characteristics that adapt it for mass production are probably generic.

Character of Trichogramma

The genus Trichogramma was established by Westwood(25) in 1833. The type specimens were found on an oak leaf in Epping Forest. There are few distinct species.

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Flanders S. 1930. Mass production of egg parasites of the genus Trichogramma. Hilgardia 4(16):465-501. DOI:10.3733/hilg.v04n16p465
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