GENETIC DIVERGENCE AMONG EASTERN NORTH AMERICAN CONE BEETLES,<i>CONOPHTHORUS</i>(COLEOPTERA: SCOLYTIDAE)

Groot, Peter de; Harvey, G. T.; Roden, P.M.

doi:10.4039/ent124189-1

Cited by 7 publications

(1 citation statement)

References 23 publications

(28 reference statements)

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“…The status of C. banksianae as a species has been questioned and further biological studies were suggested to confirm its validity (Wood, 1982). Recent studies of the life history of C. banksianae (de Groot & Borden, 1991), chromosome number and morphology (de Groot & Ennis, 1990), allozymes (de Groot et al, 1992), genitalia and pheromones (de Groot, 1991), geographic distribution and ecology (de Groot, 1992), and cuticular hydrocarbons (Page et al, 1990), failed to find a single taxonomic character (sensu Mayr, 1969) to confirm the validity of C. banksianae, and in so doing, support the synonymy suggested by Wood (1989). However the studies of McPherson et al (1970b) and Mattson (1989) indicate that the two sibling species differ in host specificity and the manner in which they accept pine shoots.…”

Section: Introductionmentioning

confidence: 92%

Host acceptance behaviour of the jack pine tip beetle, Conophthorus anksianae and the red pine cone beetle, C. resinosae

Groot¹,

Borden

1992

Entomologia Exp Applicata

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The jack pine tip beetle, Conophthorus banksianae McPherson (Coleoptera: Scolytidae) and the red pine cone beetle, C. resinosae Hopkins, are doubtful sibling species. However, it is possible that these two taxa are valid species that maintain reproductive isolation because they accept different hosts. In a series of laboratory and field cage experiments, the host acceptance behaviours of these two species under choice and no choice conditions were compared. The field experiments demonstrated that the two species have a similar propensity to accept jack pine cones and shoots for feeding, but differ consistently in their acceptance of red pine cones, and variably in their acceptance of red pine shoots. However, the laboratory experiments did not indicate a difference between the two species in their propensity to accept red pine cones for feeding. In field cages, C. resinosae accepted significantly more red pine cones for oviposition than C. banksianae; the situation was reversed for jack pine shoots. In comparison to C. banksianae, C. resinosae is a more generalist feeder. The results from this study suggest that host acceptance behaviour is a permeable barrier unable to ensure reproductive isolation between the two species. Although there are differences in the host acceptance behaviours between C. banksianae and C. resinosae, we conclude that these differences do not necessarily support their designation as distinct species.

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Section: Introductionmentioning

confidence: 92%

Host acceptance behaviour of the jack pine tip beetle, Conophthorus anksianae and the red pine cone beetle, C. resinosae

Groot¹,

Borden

1992

Entomologia Exp Applicata

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10.1007/BF00221365

2011

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Pheromones in red pine cone beetle,Conophthorus resinosae hopkins, and its synonym,C. banksianae McPherson (Coleoptera: Scolytidae)

et al. 1995

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Analyses of abdominal extracts and beetle-produced volatiles revealed that femaleConophthorus resinosae andC. banksianae produced optically pure (E)-(+)-pityol [(2R,5S)-(+)-2-(1-hydroxy-1-methylethyl)-5-methyltetrahydrofuran]. In field tests, traps baited with (E)-(±)- or (E)-(+)-pityol captured only males. Addition of host oils to traps baited with pityol did not significantly enhance the capture of males. Males of these former sibling species produced the spiroacetal (5S,7S)-(-)-7-methyl-1,6-dioxaspiro[4.5]decane with high optical purity (96%). Addition of the racemate or the optical isomers of the spiroacetal to traps baited with (E)-(±)-pityol almost completely inhibited the capture of males. It is hypothesized that to ensure their reproductive success, males produce the spiroacetal to repel rival males. Species specificity in pityol and the spiroacetal was not found betweenC. resinosae andC. banksianae, thus supporting their synonymy.

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GENETIC DIVERGENCE AMONG EASTERN NORTH AMERICAN CONE BEETLES,CONOPHTHORUS(COLEOPTERA: SCOLYTIDAE)

Cited by 7 publications

References 23 publications

Host acceptance behaviour of the jack pine tip beetle, Conophthorus anksianae and the red pine cone beetle, C. resinosae

Host acceptance behaviour of the jack pine tip beetle, Conophthorus anksianae and the red pine cone beetle, C. resinosae

10.1007/BF00221365

Pheromones in red pine cone beetle,Conophthorus resinosae hopkins, and its synonym,C. banksianae McPherson (Coleoptera: Scolytidae)

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