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ARS Home » Pacific West Area » Hilo, Hawaii » Daniel K. Inouye U.S. Pacific Basin Agricultural Research Center » Tropical Crop and Commodity Protection Research » Research » Publications at this Location » Publication #332098

Research Project: Detection, Control and Area-wide Management of Fruit Flies and Other Quarantine Pests of Tropical/Subtropical Crops

Location: Tropical Crop and Commodity Protection Research

Title: Sensitivity of the quarantine pest rough sweetpotato weevil, Blosyrus asellus to postharvest irradiation treatment

Author
item Follett, Peter
item Mcquate, Grant
item Sylva, Charmaine
item Swedman, Allison

Submitted to: Hawaiian Entomological Society Proceedings
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 11/6/2016
Publication Date: 12/12/2016
Citation: Follett, P.A., McQuate, G.T., Sylva, C.D., Swedman, A.L. 2016. Sensitivity of the quarantine pest rough sweetpotato weevil, Blosyrus asellus to postharvest irradiation treatment. Hawaiian Entomological Society Proceedings. 48:23-28.

Interpretive Summary: Rough sweetpotato weevil is a new quarantine pest of Hawaii sweetpotatoes that is causing interuptions in export shipments from Hawaii. Studies were conducted to determine whether the current radiation dose of 150 Gy, which was developed for 3 other quarantine pests, will also control any rough sweetpotato weevils. Adult weevils were treated at various levels between 25 to 125 Gy and egg laying and egg hatch were measured. Rough sweetpotato weevil was found to be highly susceptible to irradiation, with no egg hatch at any radiation dose, the lowest dose tested (25 Gy). Results suggest that the 150 Gy irradiation treatment should be sufficient for control of rough sweetpotato weevil in Hawaii sweetpotatoes.

Technical Abstract: Rough sweetpotato weevil, Blosyrus asellus (Olivier), is a new quarantine pest of Hawaii sweetpotatoes. Currently, sweetpotatoes can be exported from Hawaii to the U.S. mainland using a postharvest irradiation treatment of 150 Gy to control three other regulated insect pests. Studies were conducted to determine whether this current radiation dose will also control any rough sweetpotato weevils in export shipments. Adult weevils were treated at various levels between 25 to 125 Gy and egg laying and egg hatch were measured. Rough sweetpotato weevil was found to be highly susceptible to irradiation, with no egg hatch at any radiation dose, even 25 Gy, the lowest dose tested. Results suggest that the 150 Gy irradiation treatment should be sufficient for control of rough sweetpotato weevil in Hawaii sweetpotatoes.