Evidence for Semiochemical Divergence Between Sibling Bark Beetle Species: Dendroctonus brevicomis and Dendroctonus barberi

AbstractThe recent Californian hot drought (2012–2016) precipitated unprecedented ponderosa pine (Pinus ponderosa) mortality, largely attributable to the western pine beetle (Dendroctonus brevicomis; WPB). Broad-scale climate conditions can directly shape tree mortality patterns, but mortality rates respond non-linearly to climate when local-scale forest characteristics influence the behavior of tree-killing bark beetles (e.g., WPB). To test for these cross-scale interactions, we conduct aerial drone surveys at 32 sites along a gradient of climatic water deficit (CWD) spanning 350 km of latitude and 1000 m of elevation in WPB-impacted Sierra Nevada forests. We map, measure, and classify over 450,000 trees within 9 km2, validating measurements with coincident field plots. We find greater size, proportion, and density of ponderosa pine (the WPB host) increase host mortality rates, as does greater CWD. Critically, we find a CWD/host size interaction such that larger trees amplify host mortality rates in hot/dry sites. Management strategies for climate change adaptation should consider how bark beetle disturbances can depend on cross-scale interactions, which challenge our ability to predict and understand patterns of tree mortality.

Download Full-text

3-Methylcyclohex-2-en-1-one and the Douglas-fir beetle (Coleoptera: Curculionidae): history of successful bark beetle pheromone treatments

The Canadian Entomologist ◽

10.4039/tce.2020.62 ◽

2020 ◽

Vol 153 (1) ◽

pp. 62-78

Author(s):

Darrell W. Ross

Keyword(s):

Bark Beetle ◽

Douglas Fir ◽

Future Research ◽

Beetle Species ◽

Successful Management ◽

Dendroctonus Pseudotsugae ◽

Successful Development ◽

History Of ◽

Antiaggregation Pheromone

AbstractThis paper reviews the literature on the identification of 3-methylcyclohex-2-en-1-one (MCH) as the antiaggregation pheromone of the Douglas-fir beetle (Dendroctonus pseudotsugae Hopkins) (Coleoptera: Curculionidae) and the development of successful management applications using the pheromone. Previously unpublished data from two studies on novel uses of MCH are included. The successful development of antiaggregation pheromone-based treatments for the Douglas-fir beetle is discussed in relation to efforts to develop similar treatments for other bark beetle species, and opportunities for future research on MCH and the Douglas-fir beetle are suggested.

Download Full-text

Modeling the Impacts of Two Bark Beetle Species Under a Warming Climate in the Southwestern USA: Ecological and Economic Consequences

Environmental Management ◽

10.1007/s00267-009-9342-4 ◽

2009 ◽

Vol 44 (4) ◽

pp. 824-835 ◽

Cited By ~ 28

Author(s):

Kristen M. Waring ◽

Danielle M. Reboletti ◽

Lauren A. Mork ◽

Ching-Hsun Huang ◽

Richard W. Hofstetter ◽

...

Keyword(s):

Bark Beetle ◽

Economic Consequences ◽

Beetle Species ◽

Warming Climate ◽

Southwestern Usa

Download Full-text

INFESTATION OF CERATOCYSTIS WAGENERI-INFECTED PONDEROSA PINES BY BARK BEETLES (COLEOPTERA: SCOLYTIDAE) IN THE CENTRAL SIERRA NEVADA

The Canadian Entomologist ◽

10.4039/ent112725-7 ◽

1980 ◽

Vol 112 (7) ◽

pp. 725-730 ◽

Cited By ~ 14

Author(s):

D. J. Goheen ◽

F. W. Cobb

Keyword(s):

Sierra Nevada ◽

Bark Beetle ◽

Ponderosa Pine ◽

Bark Beetles ◽

Dendroctonus Brevicomis ◽

Disease Category ◽

The Relationship ◽

Periodic Examination ◽

Apparently Healthy

AbstractThe relationship between bark beetle infestation of ponderosa pine and severity of infection by Ceratocystis wageneri was investigated by closely monitoring 256 trees (136 apparently healthy, 60 moderately diseased, and 60 severely diseased at initiation of study) for beetle infestation from summer 1972 to fall 1975. Disease ratings were updated by periodic examination, and some trees changed disease category during the study. Ninety trees were infested by Dendroctonus brevicomis, D. ponderosae, or both, five by buprestids alone, and one tree died from effects of the pathogen alone. Sixty-two of the beetle-infested trees were severely diseased at time of infestation, 25 were moderately diseased, and only three were apparently healthy. Thus, the results showed that bark beetles were much more likely to infest infected than healthy trees. Among diseased trees, those with advanced infections were most likely to be infested. There was evidence that buprestids (especially Melanophila spp.) and possibly Ips spp. attacked diseased trees prior to Dendroctonus spp. infestation.

Download Full-text

Mechanisms and consequences of flight polyphenisms in an outbreaking bark beetle species

Journal of Experimental Biology ◽

10.1242/jeb.219642 ◽

2020 ◽

Vol 223 (12) ◽

pp. jeb219642 ◽

Cited By ~ 2

Author(s):

Kelsey L. Jones ◽

Rahmatollah Rajabzadeh ◽

Guncha Ishangulyyeva ◽

Nadir Erbilgin ◽

Maya L. Evenden

Keyword(s):

Bark Beetle ◽

Beetle Species

Download Full-text

Cryphalus eriobotryae sp. nov. (Coleoptera: Curculionidae: Scolytinae), a New Insect Pest of Loquat Eriobotrya japonica in China

Insects ◽

10.3390/insects10060180 ◽

2019 ◽

Vol 10 (6) ◽

pp. 180 ◽

Cited By ~ 1

Author(s):

Sizhu Zheng ◽

Andrew J. Johnson ◽

You Li ◽

Chunrong Chu ◽

Jiri Hulcr

Keyword(s):

New Species ◽

Bark Beetle ◽

Insect Pest ◽

Fruit Production ◽

The Other ◽

Eriobotrya Japonica ◽

Beetle Species ◽

Ornamental Trees

A previously unknown bark beetle species, Cryphalus eriobotryae sp. nov. Johnson, 2019 has emerged as a lethal pest of loquat (Eriobotrya japonica) in China. The description of new species has been provided. The new species is distinguished from the other Cryphalus by the weakly aciculate frons, by the antennae, with unevenly spaced procurved sutures, by the short pronotal disc, with hair-like setae, and by the widely spaced mesocoxae. The survey of plantation records from around Suzhou suggests that this beetle was introduced from another area not long before 2017. In the surveyed loquat plantation in 2018, 20–90% of trees showed signs of infestation, and 5% were killed in 2018, resulting in the death of over 1000 trees. Outbreaks of the apparently loquat-specific Cryphalus eriobotryae can be diagnosed by hundreds of cankers on the trunk, and wilted foliage. This pest is of concern as a loquat plantation pest and as a pest of fruit production and ornamental trees within Suzhou, and globally.

Download Full-text

Description of Phloeosinus laricionis sp. n. (Coleoptera: Curculionidae, Scolytinae), a new bark beetle species from southern Europe

Zootaxa ◽

10.11646/zootaxa.3722.1.8 ◽

2013 ◽

Vol 3722 (1) ◽

pp. 92 ◽

Cited By ~ 1

Author(s):

MASSIMO FACCOLI ◽

AGATINO SIDOTI

Keyword(s):

Bark Beetle ◽

Southern Europe ◽

Beetle Species

Download Full-text

Nonhost Angiosperm Volatiles and Verbenone Protect Individual Ponderosa Pines from Attack by Western Pine Beetle and Red Turpentine Beetle (Coleoptera: Curculionidae, Scolytinae)

Western Journal of Applied Forestry ◽

10.1093/wjaf/23.1.40 ◽

2008 ◽

Vol 23 (1) ◽

pp. 40-45 ◽

Cited By ~ 11

Author(s):

Christopher J. Fettig ◽

Christopher P. Dabney ◽

Stephen R. McKelvey ◽

Dezene P.W. Huber

Keyword(s):

Benzyl Alcohol ◽

Bark Beetle ◽

Pinus Ponderosa ◽

Tree Mortality ◽

Dendroctonus Brevicomis ◽

First Report ◽

Western Pine Beetle ◽

Dendroctonus Valens ◽

Pine Beetle

Abstract Nonhost angiosperm volatiles (NAV) and verbenone were tested for their ability to protect individual ponderosa pines, Pinus ponderosa Dougl. ex. Laws., from attack by western pine beetle (WPB), Dendroctonus brevicomis LeConte, and red turpentine beetle (RTB), Dendroctonus valens LeConte (Coleoptera: Curculionidae, Scolytinae). A combination of (−)-verbenone and eight NAVs [benzyl alcohol, benzaldehyde, guaiacol, nonanal, salicylaldehyde, (E)-2-hexenal, (E)-2-hexen-1-ol, and (Z)-2-hexen-1-ol] (NAVV) significantly reduced the density of WPB attacks and WPB successful attacks on attractant-baited trees. A significantly higher percentage of pitchouts (unsuccessful WPB attacks) occurred on NAVV-treated trees during two of three sample dates. In addition, significantly fewer RTB attacks were observed on NAVV-treated trees during all sampling dates. The application of NAVV to individual ponderosa pines significantly reduced tree mortality, with only 4 of 30 attractant-baited trees dying from bark beetle attack while 50% mortality (15/30) was observed in the untreated, baited control. To our knowledge, this is the first report establishing the effectiveness of NAVs and verbenone for protecting individual ponderosa pines from WPB attack.

Download Full-text