Response of swamp bay, Persea palustris , and redbay, P. borbonia , to Raffaelea spp. isolated from Xyleborus glabratusAuthor(s): T. J. Dreaden; A. S. Campbell; C. A. Gonzalez-Benecke; R. C. Ploetz; J. A. Smith
Source: Forest Pathology
Publication Series: Scientific Journal (JRNL)
Station: Southern Research Station
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Laurel wilt is a devastating invasive disease of members of the Lauraceae plant family. It is caused by the fungus Raffaelea lauricola, which is a nutritional symbiont of its ambrosia beetle vector, Xyleborus glabratus. In the United States, six Raffaelea spp., in addition to R. lauricola, have been recovered from mycangia of X. glabratus. We compared the response of two laurel wilt suspects, swamp bay (Persea palustris) and redbay (Persea borbonia), to five of these species, another undescribed Raffaelea sp., and R. lauricola. Six weeks after inoculation, only R. lauricola caused significantly greater symptoms than water inoculations. The fungi varied in their ability to move systemically and be recovered from the host at the end of the experiment. Stem hydraulic conductivity was decreased by R. lauricola, but none of the other taxa. Although the roles these fungi play in the life cycle of X. glabratus are not known, they do not appear to be pathogens on these host tree species.
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CitationDreaden, T. J.; Campbell, A. S.; Gonzalez-Benecke, C. A.; Ploetz, R. C.; Smith, J. A. 2016. Response of swamp bay, Persea palustris , and redbay, P. borbonia , to Raffaelea spp. isolated from Xyleborus glabratus . Forest Pathology. 47(1): e12288-. https://doi.org/10.1111/efp.12288.
First report of laurel wilt, caused by Raffaelea lauricola, on redbay (Persea borbonia) in Texas.
- Emerging forest pest threat: Redbay ambrosia beetle and laurel wilt
- New combinations in Raffaelea, Ambrosiella, and Hyalorhinocladiella, and four new species from the redbay ambrosia beetle, Xyleborus glabratus
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