Western Pine Beetle: Specificity Among Enantiomers of Male and Female Components of an Attractant Pheromone

Wood, David L.; Browne, Lloyd E.; Ewing, B.; Lindahl, Kenneth Q.; Bedard, William D.; Tilden, Paul E.; Mori, Kenji; Pitman, G. B.; Hughes, Pat R.

doi:10.1126/science.1273574

Cited by 179 publications

(72 citation statements)

References 20 publications

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“…A male attracted to the entrance tunnel soon releases frontalin (F) Libbey et al, 1974;Browne et al, 1979), and it appears he is capable of doing so immediately upon defecation (Byers et al, 1984). F, together with E, synergistically enhances the attraction of both sexes, with a small further increase due to the host resin monoterpene, myrcene (M) (Wood et al, 1976;Bedard et al, 1980). This synergism results in a dramatic increase in beetle visitation and cooperative "mass attack" which functions to overcome the resinous defense mechanisms of the host tree (Wood, 1982).…”

Section: Introductionmentioning

confidence: 99%

“…Vit6 et al (1972) proposed that D. brevicomis could release pheromone upon landing with a "contact pheromone" as opposed to the feeding-dependent pheromone components of many Ips species ("frass pheromone"). Wood et al (1976) determined that only the (+)-E and the (-)-F enantiomers were bioactive. Furthermore, the presence of inactive enantiomers in the racemic mixtures did not cause inhibition or inactivation.…”

Section: Introductionmentioning

confidence: 99%

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Interactions of pheromone component odor plumes of western pine beetle

Byers

1987

J Chem Ecol

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Abstract--The relationships between catch of D. brevicomis LeC. at sources of the synergistic pheromone components, exo-brevicomin (E) and frontalin (F), and increasing distance of separation of sources were investigated in the forest. The two components were each released with the host monoterpene, myrcene (M), in trap pairs. The traps of each pair were spaced apart at various distances (0-16 m) in either horizontal or vertical lines that were perpendicular to the mean wind direction. Both sexes were most strongly attracted when the two components were released from the same source, and increasing distance of separation between components caused exponential decreases in trap catch for all trap configurations. Males were significantly more attracted to traps with E, M alone than to corresponding traps with F, M alone, while females exhibited a preference for F, M. The theoretical relationships and properties of two coalescing plumes of individual components and their intersecting "active space" are presented and discussed. It is proposed that "confusion" or "communication disruption" techniques for insect control may be more successful if components are released individually from many points rather than released similarly in blends.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interactions of pheromone component odor plumes of western pine beetle

Byers

1987

J Chem Ecol

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“…(released her pheromone component, (+)-exo-brevicomin (E), at 4.1/zg/day, while the male released his component, ( -)-frontalin (F), at 0.86/zg/day. Together these two components with the host monoterpene myrcene (M), released by boring activity at 410 #g/day/entrance hole (Browne et al, 1979), are equally attractive to both sexes (Wood et al, 1976). Tilden and Bedard (1985) have used these component ratios to test three release rates over two orders of magnitude (1 x, 10 x, and 100 x) compared to similar levels of a 1 : 1 : 1 (E : F : M) ratio.…”

Section: Introductionmentioning

confidence: 99%

Novel diffusion-dilution method for release of semiochemicals: Testing pheromone component ratios on western pine beetle

Byers

1988

J Chem Ecol

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Abstract--Each of the pheromone components of the Western pine beetle, LeC. (Coleoptera: Scolytidae), exo-brevicomin (E) and frontalin (F), were released in the forest at various ratios 0.01 : 1, 0.1 : 1, or 1 : 1 to a constant dose of the opposite component (E or F) plus the host monoterpene myrcene (M), which were each released at 1.5 rag/day. The components were released by a new method that combines the principles of chemical diffusion through a tube with mole percentage dilution of the chemical. Both sexes of D. brevicomis were attracted similarly at comparable ratios (and release rates) of E or F and showed similar logarithmic relationships (r 2 = 0.92-0.99). The bark beetle predator, Temnochila chlorodia (Mannerheim) (Coleoptera: Trogositidae) was apparently less sensitive to E than D. brevicomis, being relatively less attracted to amounts of E equivalent to that released by 70 females, while none were attracted to that from seven females (while this rate still attracted significant numbers of conspecifics). The apparent insensitivity of bark beetles to extreme ratios between pheromone components in contrast to moths is discussed. The advantages of the diffusion-dilution method of releasing semiochemicals compared to previous methods of absorbents, wicks, capillary tubes, and semipermeable plastic membranes are also discussed. Dendroctonus brevicomis

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“…More specifically, this behaviour has been found to be dependent on the chirality of the pheromones involved (Wood et al, 1976;Vit6 et aL, 1976;Borden et aL, 1976 ;Hedden et al, 1976;Krawielitzki et al, 1977;Harring & Mori, 1977;Vit6 etaL, 1978).…”

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confidence: 97%

OLFACTORY PERCEPTION OF PHEROMONE AND HOSTODOUR ENANTIOMERS BY IPS TYPOGRAPHUS (COLEOPTERA: SCOLYTIDAE)

Dickens

1978

Entomologia Exp Applicata

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Electroantennograms (EAGs) were recorded from adult male and female beetles to enantiomers of their pheromone, cis-verbenol, and the precursor, tt-pinene. (S)-(-)-a-pinene, the precursor for (S)-(-)-c/s-verbenol, elicited significantly greater responses in both males and females than did the (R)-(+)-enantiomer. Male beetles were more responsive to the (S)-(-)-a-pinene than female beetles. The response of female beetles was significantly greater to (S)-(-)-cis-verbenol than to the (R)-(+)-enantiomer. Although EAGs indicated a similar number of acceptor sites for both the pheromone and host terpene, the pheromone had a greater affinity for its acceptor sites. Based on electro-physiological data hypothetical acceptors were constructed.

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Western Pine Beetle: Specificity Among Enantiomers of Male and Female Components of an Attractant Pheromone

Cited by 179 publications

References 20 publications

Interactions of pheromone component odor plumes of western pine beetle

Interactions of pheromone component odor plumes of western pine beetle

Novel diffusion-dilution method for release of semiochemicals: Testing pheromone component ratios on western pine beetle

OLFACTORY PERCEPTION OF PHEROMONE AND HOSTODOUR ENANTIOMERS BY IPS TYPOGRAPHUS (COLEOPTERA: SCOLYTIDAE)

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