Ecology of Root-feeding Beetles and Their Associated Fungi on Longleaf Pine in Georgia

Zanzot, James W.; Matusick, George; Eckhardt, Lori G.

doi:10.1603/en09261

Cited by 26 publications

(17 citation statements)

References 20 publications

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“…G. huntii is more virulent than all other fungal species tested; however, like all fungi used in these studies, transmission of G. huntii to longleaf pine roots is dependent on the actions of its vectors. G. huntii is closely associated with a variety of bark beetle vectors around the world (Jacobs and Wingfield, 2001) including root-feeding bark beetles Hylastes tenuis Eichhoff and Hylastes salebrosus Eichhoff in longleaf pine stands (Zanzot et al, 2010). Despite the association between G. huntii and root-feeding bark beetles, longleaf pine roots naturally infected by G. huntii have been rarely detected (Zanzot, 2009).…”

Section: Discussionmentioning

confidence: 99%

Susceptibility of longleaf pine roots to infection and damage by four root-inhabiting ophiostomatoid fungi

Matusick

Eckhardt

Somers

2010

Forest Ecology and Management

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Section: Discussionmentioning

confidence: 99%

Susceptibility of longleaf pine roots to infection and damage by four root-inhabiting ophiostomatoid fungi

Matusick

Eckhardt

Somers

2010

Forest Ecology and Management

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“…(Sullivan et al 2003;Eckhardt et al 2004;Zanzot et al 2010). Adult H. salebrosus are about 4.5-mm long and H. tenuis about 2-to 3.5-mm long (Drooz 1985).…”

Section: Species Descriptionsmentioning

confidence: 99%

Biology and Management of Root-Feeding Beetles (Coleoptera: Curculionidae) in North American Conifer Forests and Plantations

Schowalter

2018

Journal of Integrated Pest Management

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Root-feeding beetles, including several species of Hylastes Erichson (Coleoptera: Curculionidae), Hylurgops LeConte (Coleoptera: Curculionidae), Hylobius Gemar (Coleoptera: Curculionidae), Pachylobius LeConte (Coleoptera: Curculionidae), Pissodes Germar (Coleoptera: Curculionidae), and Steremnius Schönherr (Coleoptera: Curculionidae), have emerged as serious problems in conifer plantations and forests in the United States and Canada in recent decades. Root-feeding beetles are particularly associated with stressed, diseased, or injured trees. Emerging adults kill seedlings by girdling them at the root collar and kill older trees, at least in the North and West, by transmitting fungal root pathogens in the genus Leptographium Lagerberg & Melin (Ophiostomatales: Ophiostomataceae). In the South seedling, mortality can be as high as 60% for seedlings planted in winter following fall harvest. For stands harvested after 1 July, planting should be delayed a full year. Broadcast insecticides can be used, but dipping seedlings in 0.75% permethrin prior to planting and physical barriers to feeding have proven effective. However, an integrated pest management approach that emphasizes a combination of measures to minimize attraction of beetles and to maintain health of host trees is recommended. Shelterwood harvest and soil scarification can create site conditions that minimize attraction of root beetles. Precommercial thinning and prescribed fire are often used to reduce tree competition and reduce vulnerability to stem-colonizing bark beetles. However, root beetles are attracted to thinned or burned stands, for at least 6-7 mo. Therefore, thinning should be avoided in areas of high risk for root disease transmission or, when necessary, thinning should be implemented during June or July following beetle dispersal in May. Semiochemicals can be used to monitor abundances of root beetles.

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“…However, causality between tree death and biotic factors in SPD is not clear. While recent research suggests a link between abundance of rhizophagous weevils and SPD (Eckhardt et al, 2007;Zanzot et al, 2010) or stand thinning (Zeng et al, 2014), other research from the southeastern U.S. indicates that healthy stands are not at risk for attack by rhizophagous or stem-infesting beetles. Hines and Heikkenen (1977) found that over 99% of the seven most common bark and woodboring species (including H. pales and H. porculus) were captured at girdled compared to control Virginia pine (Pinus virginiana Mill.)…”

Section: Potential For Leptographium Complex-induced Mortality In Matmentioning

confidence: 99%

A review of southern pine decline in North America

Coyle

Klepzig

Koch

et al. 2015

Forest Ecology and Management

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Ecology of Root-feeding Beetles and Their Associated Fungi on Longleaf Pine in Georgia

Cited by 26 publications

References 20 publications

Susceptibility of longleaf pine roots to infection and damage by four root-inhabiting ophiostomatoid fungi

Susceptibility of longleaf pine roots to infection and damage by four root-inhabiting ophiostomatoid fungi

Biology and Management of Root-Feeding Beetles (Coleoptera: Curculionidae) in North American Conifer Forests and Plantations

A review of southern pine decline in North America

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