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Additional pest surveyed: hickory declineAuthor(s): Jennifer Juzwik; Ji-Hyun Park
Source: In: Iowa's forest health highlights. DesMoines, IA: Iowa Department of Natural Resources: 40-42.
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
PDF: View PDF (123.09 KB)
DescriptionA five year investigation of the cause of rapid crown decline and mortality of bitternut hickory was concluded in September 2011. Results of a series of related studies found that multiple cankers and xylem (the water conducting tissue) dysfunction caused by Ceratocystis smalleyi are correlated with rapid crown decline typical of a limited vascular wilt disease. Because reproductive attacks by the hickory bark beetle (Scolytus quadrispinosus) also are correlated with canker and xylem lesion occurrence, the synergistic interaction of the beetle and the fungus in combination with host stress (e.g. drought) is important in disease development. This disease has been referred to as hickory decline or hickory dieback in the past several decades; however, the researchers propose hickory wilt as a more appropriate name based on their recent findings. A brief synopsis of the key results supporting these conclusions is presented in this report.
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CitationJuzwik, Jennifer; Park, Ji-Hyun. 2011. Additional pest surveyed: hickory decline. In: Iowa's forest health highlights. DesMoines, IA: Iowa Department of Natural Resources: 40-42.
KeywordsFusarium solani, Ceratocystis smalleyi
- Multiple Ceratocystis smalleyi infections associated with reduced stem water transport in bitternut hickory
- Biotic agents responsible for rapid crown decline and mortality of hickory in northeastern and north central USA
- Fungi associated with stem cankers and coincidental scolytid beetles on declining hickory in the upper midwest
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