Evidence for Regional Differences in the Response of Obliquebanded Leafroller (Lepidoptera: Tortricidae) to Sex Pheromone Blends

Thomson, D. R.; Angerilli, N. P. D.; Vincent, Charles; Gaunce, A. P.

doi:10.1093/ee/20.3.935

Cited by 39 publications

(27 citation statements)

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“…Despite the importance and specificity of the 3 minor pheromone components in the attractiveness of the sex pheromone blend for male C. rosaceana in western North America (Vakenti et al 1988, Thomson et al 1991, we failed in a series of both small-plot and field-cage studies to show any significant role of the minor components Zll-14:Ald and Zll-14:0H in disruption. Similarly, Agnello et al (1996) found no difference in the level of disruption by using dispensers loaded with either a 94:6 Z:Ell-14:0Ac blend or a 90:5:5 Z:Ell-14:0Ac: Zll-14:0H blend in New York.…”

Section: Discussionmentioning

confidence: 82%

“…Blends with 3-6% Ell-14:0Ac were significantly less attractive. Thomson et al (1991) found that decreasing the percentage of Ell-14:0Ac from 5.0 to 2.5% significantly improved attraction. Reissig et al (1978) found that including Ell-14:0Ac in the pheromone blend marginally improved disruption; however, its proportion in the blend was not specified.…”

Section: Discussionmentioning

confidence: 90%

“…Vakenti et al (1988) detected Zl1-14:Ald in female tip extracts in a population of C. rosaceana from western Canada and showed its importance in enhancing the attractiveness of the 3-component blend. Thomson et al (1991) found that inclusion ofZl1-14: AId in a 4-component blend enhanced moth catch compared with the 3-component blend for populations in British Columbia, but not for populations in Quebec. Several trapping studies with C. rosaceana in California, Oregon, and Washington have caught 5-10 times more moths with the pheromone blend of Argyrotaenia citrana Fernald that includes Zl1-14:Ald (Hill et al 1975) than with similar lures loaded with the eastern blend of C. rosaceana (A.L.K., unpublished data) .…”

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confidence: 89%

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Developing Mating Disruption of Obliquebanded Leafroller (Lepidoptera: Tortricidae) in Washington State

Knight¹,

Thomson²,

Cockfield³

1998

Environmental Entomology

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Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 90%

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confidence: 89%

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Developing Mating Disruption of Obliquebanded Leafroller (Lepidoptera: Tortricidae) in Washington State

Knight¹,

Thomson²,

Cockfield³

1998

Environmental Entomology

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“…This led to the hypothesis that the pheromone blend of E. lignosellus in Brazil might be different due to regional variations [6,7].…”

Section: Introductionmentioning

confidence: 99%

Identification (GC and GC-MS) of unsaturated acetates inElasmopalpus lignosellus and their biological activity (GC-EAD and EAG)

Jham¹,

Silva²,

Lima

et al. 2005

J. Sep. Science

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Two insect colonies of Elasmopalpus lignosellus were reared in our laboratory, the first being initiated from pupae obtained from a cornfield in the region of Sete Lagoas, Minas Gerais and the second from a cornfield in the region of Goiânia, Goiás. From the two colonies, two extracts were prepared from the pheromone glands of virgin E. lignosellus females. The extract obtained from the first colony was designated as extract 1 while the extract obtained from the second colony was designated as extract 2. Extract 1 was analyzed by gas chromatography-mass spectrometry (GC-MS) with (Z)-9-hexadecenyl acetate [(Z)-9-HDA] and (Z)-11-hexadecenyl acetate [(Z)-11-HDA] being identified and confirmed by the formation of DMDS derivatives. In addition, a third acetate, which could be either (E)-8-hexadecenyl acetate [(E)-8-HDA] or (E)-9-hexadecenyl acetate [(E)-9-HDA] was detected by GC-MS. Extract 2 was analyzed by gas chromatography (GC) and gas chromatography-electroannetography (GC-EAD) revealing the presence of (Z)-11-HDA and (Z)-9-TDA. In addition, the same compounds elicited a response with the E. lignosellus male antenna obtained from the second insect colony. Electroantennography (EAG) screening with the male E. lignosellus antenna (obtained from the second insect colony) was conducted with the 23 possible tetradecenyl acetates (TDA) and 22 hexadecenyl acetates (HDA) as standards. Out of the 23 TDA isomers evaluated, only (Z)-9-TDA elicited a response and out of the 22 HDA [(Z) and (E) isomers gamma2 to delta13] evaluated only (Z)-11-HDA elicited a response. The acetate compositions of two extracts obtained from insects originating from the two states (Minas Gerais and Goiás) of Brazil were different from one another as well as from that obtained from insects in Tifton, GA, USA. The bioactivity data (GC-EAD) of the extract 2 differed from those reported for the Tifton, GA, USA population. These data suggest polymorphism in relation to the insect populations found in Brazil and in the USA. The possibility of the existence of an E. lignosellus sub-species cannot be ruled out.

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“…Greater success has been recorded with a Western population of obliquebanded leafroller in British Columbia, Canada (Evenden et al, 1999a,b). The females of this Western population contain different amounts and ratios of the four-component pheromone and the males are characterized by different behavioral and antennal responsiveness to blends of these four components as compared with Eastern U.S. populations of this species (Vakenti et al, 1988, Thomson et al, 1991El-Sayed et al, 2003). Despite numerous studies on mating disruption of these two species, the mechanisms behind its effectiveness are still poorly understood.…”

Section: Introductionmentioning

confidence: 99%

Comparative behavioral and EAG responses of female obliquebanded and redbanded leafroller moths (Lepidoptera: Tortricidae) to their sex pheromone components

Gökçe¹,

Stelinski²,

Gut³

et al. 2007

Eur. J. Entomol.

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Abstract. Studies were conducted investigating the responses of female obliquebanded leafrollers, Choristoneura rosaceana (Harris) and redbanded leafrollers, Argyrotaenia velutinana (Walker) (Lepidoptera: Tortricidae), to components of their sex pheromone. Electroantennogram (EAG) recordings revealed significant responses from antennae of female moths of both species to the major pheromone component, (Z)-11-tetradecenyl acetate, at dosages ranging from 2 µg -2 mg. However, tested individually, the minor pheromone components of the obliquebanded leafroller, (E)-11-tetradecenyl acetate and (Z)-11-tetradecenol, elicited little or no antennal response from conspecific females. This result was consistent for redbanded leafroller females, which showed only weak responses to the minor component (E)-11-tetradecenyl acetate at a 2 mg dosage. For both species, species-specific blend ratios of the Z and E isomers of tetradecenyl acetate did not elicit a greater antennal response than the Z isomer alone. Virgin females of each species (2-4 d old) were placed into 1-liter plastic assay chambers with constant throughput of carbon-filtered air passed through 1-liter flasks containing rubber septa loaded with (Z)-and (E)-11-tetradecenyl acetates and (Z)-11-tetradecenol for trials with female obliquebanded leafrollers or with (Z)-and (E)-11-tetradecenyl acetates and dodecyl acetate for trials with female redbanded leafrollers. Exposure to pheromone-permeated air delayed the onset of calling by 1 h and terminated the calling period 1 h earlier for both species compared with solvent-control exposed females. Furthermore, the total proportion of calling females was reduced by half in chambers receiving constant throughput of pheromone-permeated air compared with solvent controls. Exposure to pheromonepermeated air also significantly reduced egg-laying in both species compared with clean-air controls. Furthermore, application of the major pheromone component, (Z)-11-tetradecenyl acetate, at dosages ranging from 2 µg-2 mg to wax-paper ovipositional substrates, deterred oviposition by females of both species. Our data suggest that application of synthetic sex-attractant pheromones for mating disruption of leafroller species may have deleterious effects on female moth behavior, which may contribute to pest control. Field investigations will need to be conducted to test this hypothesis. 187* Corresponding author; current address:

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Evidence for Regional Differences in the Response of Obliquebanded Leafroller (Lepidoptera: Tortricidae) to Sex Pheromone Blends

Cited by 39 publications

References 0 publications

Developing Mating Disruption of Obliquebanded Leafroller (Lepidoptera: Tortricidae) in Washington State

Developing Mating Disruption of Obliquebanded Leafroller (Lepidoptera: Tortricidae) in Washington State

Identification (GC and GC-MS) of unsaturated acetates inElasmopalpus lignosellus and their biological activity (GC-EAD and EAG)

Comparative behavioral and EAG responses of female obliquebanded and redbanded leafroller moths (Lepidoptera: Tortricidae) to their sex pheromone components

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