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Title: Influence of irradiation on development of Caribbean fruit fly (diptera: tephritidae) larvae

Larvae of the Caribbean fruit fly, Anastrepha suspensa (Loew), were irradiated at hatching with 0, 5, 10, 20, 50, 75, 100 and 150 Gy doses from a Cesium-137 source and dissected for measurements of the supraesophageal ganglion (brain) and proventriculus (B/Prv) as mature third instars. Cross-sectional area of a plane through the brain and proventriculus, and simple dorsal width measurements of the two organs were evaluated as indicators of radiation exposure. Brain area, brain width, and brain/proventriculus (B/Prv) ratios were significantly different from controls in insects treated with a dose {ge}20 Gy. Detailed dissections of hatching larvae exposed to 50 Gy revealed reductions in brain growth, small and misshapen compound eye and leg imaginal disks, and a ventral nerve cord that was elongated and sinuous. Larvae irradiated on the 1st d of each of the three instars had smaller brains, with the percentage of reduction in brain size being greater the younger the larvae were at the time of exposure. Brain and proventriculus measurements and calculated B/Prv values are indicative of irradiation in Caribbean fruit fly larvae, but the procedure may not be adaptable for routine use by quarantine inspectors. 14 refs., 4 figs., 2 tabs.
Authors:
; ;  [1]
  1. Univ. of Florida, Gainesville, FL (United States) [and others
Publication Date:
OSTI Identifier:
272765
Resource Type:
Journal Article
Resource Relation:
Journal Name: Annals of the Entomological Society of America; Journal Volume: 88; Journal Issue: 3; Other Information: PBD: May 1995
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
56 BIOLOGY AND MEDICINE, APPLIED STUDIES; DIPTERA; BIOLOGICAL RADIATION EFFECTS; LARVAE; ONTOGENESIS; CESIUM 137