Understanding the movement and dispersal patterns of released Fopius arisanus (Hymenoptera: Braconidae) parasitoids in a papaya orchard.

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  • Additional Information
    • Source:
      Publisher: Oxford University Press Country of Publication: England NLM ID: 7502320 Publication Model: Print Cited Medium: Internet ISSN: 1938-2936 (Electronic) Linking ISSN: 0046225X NLM ISO Abbreviation: Environ Entomol Subsets: MEDLINE
    • Publication Information:
      Publication: Oxford : Oxford University Press
      Original Publication: College Park, Md., Entomological Society of America.
    • Subject Terms:
      Wasps*/physiology ; Pest Control, Biological* ; Carica* ; Animal Distribution*; Animals ; Host-Parasite Interactions ; Tephritidae/parasitology ; Tephritidae/physiology
    • Abstract:
      Implementation of augmentative biological control requires estimates of parasitoid dispersal from the release point to determine appropriate release density, spacing, and timing. This study evaluated the movement patterns of Fopius arisanus Sonan (Hymenoptera: Braconidae) parasitoids, which have historically been used to control invasive tephritid fruit flies. The wasps were released from the central point, and dispersal was monitored over time using parasitism in sentinel fruit and trap captures at 40 points radiating out from the center (15-240 m). The releases were conducted 4 times during June, July, September, and November 2006. The data showed that there were large declines in dispersal by distance. Parasitism was greatest closest to the release point, within 30 m. Parasitism was also greatest within the first 24 h of the release. After 1 wk, parasitism decreased from 41% to 1.5% within 30 m. These data correlated strongly with trap capture data, which also showed that parasitoid movement favored the SE region of our release site, roughly corresponding to the overall prevailing winds. Wind speed, relative humidity, and temperature all affected parasitoid movement during our trial, indicating the complex environmental factors that can affect release success. This is the first report of dispersal metrics for F. arisanus. Our findings are in agreement with other similar studies on braconid movement generally and suggest that frequent, high-density releases are most effective since the dispersal of F. arisanus is limited and retention in the environment is low. We discuss our results in the context of international augmentative biological control release programs.
      (Published by Oxford University Press on behalf of Entomological Society of America 2024.)
    • Contributed Indexing:
      Keywords: Braconidae; Hawaii; biocontrol; movement; parasitoid
    • Publication Date:
      Date Created: 20240418 Date Completed: 20240613 Latest Revision: 20240613
    • Publication Date:
      20240613
    • Accession Number:
      10.1093/ee/nvae029
    • Accession Number:
      38632970