Ethological function of components of a sex attractant system for oriental fruit moth males, Grapholitha molesta (Lepidoptera: Tortricidae)

R. T. Cardé, Thomas Charles Baker, W. L. Roelofs

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Field studies of male Oriental fruit moth, Grapholitha molesta (Busck), behavior indicated that a mixture of cis-8-dodecenyl acetate (c8-12:Ac) and ca. 7% trans-8-dodecenyl acetate (t8-12:Ac) was requisite for upwind anemotaxis. The simultaneous emission of dodecyl alcohol (12:OH) and the attractant blend of c8-12:Ac containing ca. 7% t8-12:Ac elicited a behavioral repertoire including close-range orientation, landing near the chemical source, wing fanning, and extrusion of the males' abdominal hairpencils in precopulatory display. The effect of 12:OH in increasing trap catches was, therefore, not due to its effect on upwind anemotaxis, but rather to its importance in eliciting landing and other close-range precopulatory behavior. Interestingly, cis-8-dodecen-1-ol in extremely low ratios to the attractants (1:333) appeared to duplicate the activity of 12:OH used in ratios of 3:1 to the attractants. Laboratory observations of mating sequences revealed that male hairpencil eversion always preceded copulation. The evidence supports a male response sequence based on specific component combinations and concentrations eliciting successive behavioral steps rather than a response hierarchy dependent on increases in concentration of a single chemical or blend. Additionally, the closeness of the males' approach to c8-12:Ac containing ca. 7% t8-12:Ac was optimal at a discrete emission rate, and male responses were diminished within 30-60 sec after the males' arrival at the attractant source.

Original languageEnglish (US)
Pages (from-to)475-491
Number of pages17
JournalJournal of Chemical Ecology
Volume1
Issue number4
DOIs
StatePublished - Dec 1 1975

Fingerprint

sex attractants
Grapholita molesta
Sex Attractants
Lepidoptera
Moths
attractant
Tortricidae
Fruits
Landing
moth
Fruit
Dodecanol
fruit
attractants
Extrusion
Display devices
acetate
wing fanning
acetates
Copulation

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Biochemistry

Cite this

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title = "Ethological function of components of a sex attractant system for oriental fruit moth males, Grapholitha molesta (Lepidoptera: Tortricidae)",
abstract = "Field studies of male Oriental fruit moth, Grapholitha molesta (Busck), behavior indicated that a mixture of cis-8-dodecenyl acetate (c8-12:Ac) and ca. 7{\%} trans-8-dodecenyl acetate (t8-12:Ac) was requisite for upwind anemotaxis. The simultaneous emission of dodecyl alcohol (12:OH) and the attractant blend of c8-12:Ac containing ca. 7{\%} t8-12:Ac elicited a behavioral repertoire including close-range orientation, landing near the chemical source, wing fanning, and extrusion of the males' abdominal hairpencils in precopulatory display. The effect of 12:OH in increasing trap catches was, therefore, not due to its effect on upwind anemotaxis, but rather to its importance in eliciting landing and other close-range precopulatory behavior. Interestingly, cis-8-dodecen-1-ol in extremely low ratios to the attractants (1:333) appeared to duplicate the activity of 12:OH used in ratios of 3:1 to the attractants. Laboratory observations of mating sequences revealed that male hairpencil eversion always preceded copulation. The evidence supports a male response sequence based on specific component combinations and concentrations eliciting successive behavioral steps rather than a response hierarchy dependent on increases in concentration of a single chemical or blend. Additionally, the closeness of the males' approach to c8-12:Ac containing ca. 7{\%} t8-12:Ac was optimal at a discrete emission rate, and male responses were diminished within 30-60 sec after the males' arrival at the attractant source.",
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Ethological function of components of a sex attractant system for oriental fruit moth males, Grapholitha molesta (Lepidoptera : Tortricidae). / Cardé, R. T.; Baker, Thomas Charles; Roelofs, W. L.

In: Journal of Chemical Ecology, Vol. 1, No. 4, 01.12.1975, p. 475-491.

Research output: Contribution to journalArticle

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