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1 November 2011 Developmental Arrest in Mexican Fruit Fly (Diptera: Tephritidae) Irradiated in Grapefruit
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Abstract

When holometabolous insect larvae are exposed to a radiation treatment, morbidity or mortality are typically manifested during a major developmental transition, usually a transition involving ecdysis. Thus, early instars fail to develop into later instars or the later instars fail to pupate or pupariate. Over a range of sublethal doses of gamma radiation (increments of 0, 15, 20, 25, and 30 Gy) applied to third-instar Mexican fruit flies, Anastrepha ludens (Loew) (Diptera: Tephritidae), infesting or implanted in grapefruits, Citrus paradisi Macfayden, survival decreased with increasing dose. At all radiation doses, the majority of treated larvae arrested development at pupal ecdysis, the transformation from a cryptocephalic to a phanerocephalic pupa. More than 96% of treated larvae died at, or before, reaching this transition at the highest dose tested (30 Gy). Contrary to expectations, the radiation treatment did not cause atrophy of the imaginai tissues, a result that we attribute to apoptosis.

Donald B. Thomas and Guy J. Hallman "Developmental Arrest in Mexican Fruit Fly (Diptera: Tephritidae) Irradiated in Grapefruit," Annals of the Entomological Society of America 104(6), 1367-1372, (1 November 2011). https://doi.org/10.1603/AN11035
Received: 16 February 2011; Accepted: 1 July 2011; Published: 1 November 2011
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