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Insects 2018, 9(1), 30; https://doi.org/10.3390/insects9010030

Xyleborus bispinatus Reared on Artificial Media in the Presence or Absence of the Laurel Wilt Pathogen (Raffaelea lauricola)

1
Tropical Research & Education Center, University of Florida 18905 SW 280th St, Homestead, FL 33031, USA
2
Subtropical Horticulture Research Station, USDA-ARS, 13601 Old Cutler Rd., Miami, FL 33158, USA
3
Otis Laboratory, USDA-APHIS-PPQ-CPHST, 1398 W. Truck Road, Buzzards Bay, MA 02542, USA
*
Author to whom correspondence should be addressed.
Received: 12 January 2018 / Revised: 12 February 2018 / Accepted: 24 February 2018 / Published: 28 February 2018
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Abstract

Like other members of the tribe Xyleborini, Xyleborus bispinatus Eichhoff can cause economic damage in the Neotropics. X. bispinatus has been found to acquire the laurel wilt pathogen Raffaelea lauricola (T. C. Harr., Fraedrich & Aghayeva) when breeding in a host affected by the pathogen. Its role as a potential vector of R. lauricola is under investigation. The main objective of this study was to evaluate three artificial media, containing sawdust of avocado (Persea americana Mill.) and silkbay (Persea humilis Nash.), for rearing X. bispinatus under laboratory conditions. In addition, the media were inoculated with R. lauricola to evaluate its effect on the biology of X. bispinatus. There was a significant interaction between sawdust species and R. lauricola for all media. Two of the media supported the prolific reproduction of X. bispinatus, but the avocado-based medium was generally more effective than the silkbay-based medium, regardless whether or not it was inoculated with R. lauricola. R. lauricola had a neutral or positive effect on beetle reproduction. The pathogen was frequently recovered from beetle galleries, but only from a few individuals which were reared on inoculated media, and showed limited colonization of the beetle’s mycangia. Two media with lower water content were most effective for rearing X. bispinatus. View Full-Text
Keywords: ambrosia beetle; ambrosia fungi; beetle–fungus symbiosis; Coleoptera; Curculionidae; Lauraceae; Persea americana; Persea humilis; Scolytinae; Xyleborini ambrosia beetle; ambrosia fungi; beetle–fungus symbiosis; Coleoptera; Curculionidae; Lauraceae; Persea americana; Persea humilis; Scolytinae; Xyleborini
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Menocal, O.; Cruz, L.F.; Kendra, P.E.; Crane, J.H.; Cooperband, M.F.; Ploetz, R.C.; Carrillo, D. Xyleborus bispinatus Reared on Artificial Media in the Presence or Absence of the Laurel Wilt Pathogen (Raffaelea lauricola). Insects 2018, 9, 30.

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