Large-Scale Confirmatory Tests of a Phytosanitary Irradiation Treatment Against Sternochetus frigidus (Coleoptera: Curculionidae) in Philippine Mango

Large-Scale Confirmatory Tests of a Phytosanitary Irradiation Treatment Against Sternochetus frigidus (Coleoptera: Curculionidae) in Philippine Mango

The mango pulp weevil, Sternochetus frigidus (F.), is an important quarantine pest preventing the export of mangoes from the Philippines to the United States and other countries. Previously, a radiation dose of 100 Gy was proposed for phytosanitary treatment of S. frigidus based on dose-response stu...

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Bibliographic Details
Published in:Journal of economic entomology Vol. 107; no. 1; pp. 161 - 165
Main Authors: Obra, Glenda. B., Resilva, S. S., Follett, P. A., Lorenzana, L.R.J.
Format: Journal Article
Language:English
Published: Oxford, UK Entomological Society of America 01-02-2014
Oxford University Press
Subjects:
Animals
COMMODITY TREATMENT AND QUARANTINE ENTOMOLOGY
Curculionidae
disinfestation
Eggs
Female
Food Irradiation
Irradiation
Larvae
Male
Mangifera
mango pulp weevil
Mangoes
Philippines
postharvest phytosanitary treatment
Pulp
Quarantine
quarantine pest
Sterility
Sternochetus
Sternochetus frigidus
Weevils - radiation effects
Philippines
mango pulp weevil
quarantine pest
disinfestation
postharvest phytosanitary treatment
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Summary:The mango pulp weevil, Sternochetus frigidus (F.), is an important quarantine pest preventing the export of mangoes from the Philippines to the United States and other countries. Previously, a radiation dose of 100 Gy was proposed for phytosanitary treatment of S. frigidus based on dose-response studies with larvae, pupae, and adult weevils. To validate an irradiation treatment, large-scale confirmatory tests were conducted with adults (the most radiation-tolerant stage) in mangoes at 100 and 150 Gy. After treatment, adults were removed from fruit, sexed, and mated in pairs to observe any reproduction. At 100 Gy, adults laid a small number of eggs but none of the eggs hatched. At 150 Gy (measured doses 96.7–164.1 Gy), 4,559 treated weevils laid no eggs, indicating that this dose caused complete sterility. Irradiation treatment with a minimum absorbed dose of 165 Gy will therefore provide quarantine security for S. frigidus in exported Philippine mangoes.
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ISSN:0022-0493
1938-291X
0022-0493
DOI:10.1603/EC13316