Geographic and Gender Differences in Semiochemicals in Emerging Adult Southern Pine Beetle (Coleoptera: Scolytidae)

Grosman, Donald M.; Salom, Scott M.; Ravlin, F. William; Young, R. W.

doi:10.1093/aesa/90.4.438

Cited by 31 publications

(27 citation statements)

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“…The disparity among these three data sets was most likely caused by differences in the reliability of the analytical techniques, because no significant geographic variation in the enantiomeric ratio of endo-brevicomin was identified in our data or those of Grosman et al (1997). Our findings and those of Redlich et al (1987) both indicated that the (+)-enantiomer was predominant, and both studies were performed by using MSD chromatograms of single, diagnostic ions for endo-brevicomin.…”

Section: Discussionmentioning

confidence: 66%

“…Our findings and those of Redlich et al (1987) both indicated that the (+)-enantiomer was predominant, and both studies were performed by using MSD chromatograms of single, diagnostic ions for endo-brevicomin. This procedure would have largely ensured that only the target molecule was quantified and would have prevented overestimation of the abundance of (-)-endo-brevicomin because of coelution of compounds indistinguishable by FID alone, as could have occurred in the study of Grosman et al (1997). Additionally, our study provided a more meaningful picture of endobrevicomin chirality than previous ones, because it examined paired males, apparently the only life stage that produces this compound in large quantities.…”

Section: Discussionmentioning

confidence: 99%

“…Grosman et al (1997) isolated an average of 17 ng endo-brevicomin per male beetle from three geographically isolated D. frontalis populations. These earlier studies examined only newly emerged beetles Grosman et al 1997), which according to our data, produce relatively small amounts of endo-brevicomin (Fig. 6a).…”

Section: Discussionmentioning

confidence: 99%

“…First, conflicting evidence exists regarding the enantiomeric composition of endo-brevicomin (Redlich et al 1987;Grosman et al 1997), hence the relative amounts of the apparently repellant (-) and the attractive (+)-enantiomers produced by D. fiontalis is uncertain. Second, addition of male D. ji-ontalis to female-infested pine bolts failed to alter responses of conspecifics Svihra 1982), suggesting that male-produced semiochemicals neither inhibit nor enhance aggregation during host colonization.…”

Section: Introductionmentioning

confidence: 99%

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Evidence that (+)-endo-Brevicomin is a Male-Produced Component of the Southern Pine Beetle Aggregation Pheromone

et al. 2007

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Previous research indicated that the aggregation pheromone of the southern pine beetle, Dendroctonus frontalis, is produced only by females, the sex that initiates attacks. We provide evidence indicating that secondarily arriving males augment mass aggregation by releasing the attractive synergist (+)-endo-brevicomin. Healthy pines artificially infested with both sexes of D. frontalis were significantly more attractive to conspecifics than trees infested solely with females. Coupled gas chromatography-electroantennographic detection (GC-EAD) analyses of volatiles isolated from male beetles revealed substantially greater olfactory sensitivity by D, frontalis to endo-brevicomin than to any other component. The threshold of detection of both sexes for (+)-endo-brevicomin was four orders of magnitude lower than for its antipode and at least one order of magnitude lower than for either enantiomer of frontalin, the major female-produced aggregation pheromone component. Pairing with a female in a gallery stimulated individual male beetles to produce hundreds of nanograms of (+)-endo-brevicomin. (4-)-endo-Brevicomin was detected in a small percentage of female D. frontalis, whereas (-)-endo-brevicomin was never detected in either sex. In field trapping bioassays, we confirmed that (+)-endo-brevicomin is a potent synergist for attractive combinations of frontalin and pine turpentine. However, (+)-endobrevicomin failed to attract D. frontalis either when presented alone or in combination with turpentine. We postulate that mass colonization of host trees by D. frontalis is mediated by distinct semiochemicals from both sexes rather than females alone. Our discovery of a key aggregation pheromone component in such an apparently well-studied species implies that the pheromone models of other bark beetles could benefit from systematic reexamination using newer technologies. Additionally, baits fortified with (+)-endo-brevicomin may enhance pest management strategies that exploit attractants for D. frontalis.

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Section: Discussionmentioning

confidence: 66%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evidence that (+)-endo-Brevicomin is a Male-Produced Component of the Southern Pine Beetle Aggregation Pheromone

et al. 2007

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“…It is present in newly emerged, host-arriving, and gallery-establishing females Pureswaran et al, 2007;Renwick and Vit e, 1968;Sullivan et al, 2007bSullivan et al, , 2012 and generally is undetectable in males (although see Grosman, 1996;Grosman et al, 1997;Pureswaran et al, 2006;. Evidence of its uniqueness to females is consistent with the observation that logs infested with solitary D. frontalis females are attractive whereas those with forced male attacks are not .…”

Section: Frontalinmentioning

confidence: 64%

Semiochemicals in the Natural History of Southern Pine Beetle Dendroctonus frontalis Zimmermann and Their Role in Pest Management

Sullivan

2016

Advances in Insect Physiology

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Isolation and expression of five genes in the mevalonate pathway of the Chinese white pine beetle, Dendroctonus armandi (Curculionidae: Scolytinae)

Sun

Dai

Kang

et al. 2020

Arch Insect Biochem Physiol

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The Chinese white pine beetle Dendroctonus armandi (Tsai and Li) is a significant pest of the Qinling and Bashan Mountains pine forests of China. The Chinese white pine beetle can overcome the defences of Chinese white pine Pinus armandi (Franch) through pheromone‐assisted aggregation that results in a mass attack of host trees. We isolated five full‐length complementary DNAs encoding mevalonate pathway‐related enzyme genes from the Chinese white pine beetle (D. armandi), which are acetoacetyl‐CoA thiolase (AACT), geranylgeranyl diphosphate synthase (GGPPS), mevalonate kinase (MK), mevalonate diphosphate decarboxylase (MPDC), and phosphomevalonate kinase (PMK). Bioinformatic analyses were performed on the full‐length deduced amino acid sequences. Differential expression of these five genes was observed between sexes, and within these significant differences among topically applied juvenile hormone III (JH III), fed on phloem of P. armandi, tissue distribution, and development stage. Mevalonate pathway genes expression were induced by JH III and feeding.

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Geographic and Gender Differences in Semiochemicals in Emerging Adult Southern Pine Beetle (Coleoptera: Scolytidae)

Cited by 31 publications

References 0 publications

Evidence that (+)-endo-Brevicomin is a Male-Produced Component of the Southern Pine Beetle Aggregation Pheromone

Evidence that (+)-endo-Brevicomin is a Male-Produced Component of the Southern Pine Beetle Aggregation Pheromone

Semiochemicals in the Natural History of Southern Pine Beetle Dendroctonus frontalis Zimmermann and Their Role in Pest Management

Isolation and expression of five genes in the mevalonate pathway of the Chinese white pine beetle, Dendroctonus armandi (Curculionidae: Scolytinae)

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