First Field Collection of the Rough Sweetpotato Weevil, Blosyrus asellus (Olivier) (Coleoptera: Curculionidae), on Hawaii Island, with Notes on Detection Methods
First Field Collection of the Rough Sweetpotato Weevil, Blosyrus asellus (Olivier) (Coleoptera: Curculionidae), on Hawaii Island, with Notes on Detection Methods
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2016-12-12
Authors
McQuate, Grant T.
Sylva, Charmaine D.
Kumashiro, Bernarr R.
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Hawaiian Entomological Society
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Abstract
Rough sweetpotato weevil, Blosyrus asellus (Olivier) (Coleoptera: Cur- culionidae), was first detected in the state of Hawaii at a commercial Okinawan sweetpotato farm in Waipio, Oahu, on 14 November 2008. Damage by this weevil species differs from other weevil pests of sweetpotato in Hawaii in that the rough sweetpotato weevil grubs feed on the surface of the sweetpotato root, creating channels on the surface of the root that damage the root and decrease its market- ability. Reported here is the first detection of this pest in sweetpotato fields on the island of Hawaii (Pepeekeo), in October 2014, with subsequent documentation in Paauilo (November 2014) and Papaikou (May 2015). Also reported is a trapping system that incorporates a solar powered green light emitting diode (LED) that can be used for detection, and some level of control, of this pest species in the field. Given our experience that a green light trap containing a sweetpotato-based bait has some attraction for the sweetpotato weevil (Cylas formicarius [Summers] [Coleoptera: Brentidae]), the West Indian sweetpotato weevil (Euscepes postfas- ciatus [Fairmaire] [Coleoptera: Curculionidae]) and the rough sweetpotato weevil, there is hope that this trap design could also detect the presence of other weevil pests of sweetpotato that might invade Hawaii.
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rough sweetpotato weevil,
sweetpotato,,
Blosyrus,
green light,
detection
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Proceedings of the Hawaiian Entomological Society (2016) 48:1–8
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