Interpopulational variation in emitted pheromone blend of cabbage looper moth, Trichoplusia ni

K. F. Haynes, R. E. Hunt

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


Female cabbage looper moths, Trichoplusia ni, from laboratory colonies initiated from three locations across the United States emitted similar quantities and blend ratios of the six known pheromone components. In contrast, females from a long-established laboratory colony emitted a greater proportion of four of the five minor components relative to the major component, (Z)-7-dodecenyl acetate; only the relative proportion of 11-dodecenyl acetate was similar in all of the populations sampled. Females from this population emitted (Z)-7-dodecenyl acetate at a rate similar to that from females from field-collected colonies. Within each population there were highly significant correlations among the quantities of pheromone components of similar molecular weights. Correlations between components of different molecular weights were not as great, but often were significant. Similarities of blend ratios among field populations may indicate that the chemical signal in this species is conservative. The difference of the blend ratios in our laboratory population from the other populations may indicate a decrease in the intensity of selection pressure that usually would maintain these values.

Original languageEnglish
Pages (from-to)509-519
Number of pages11
JournalJournal of Chemical Ecology
Issue number2
StatePublished - Feb 1990


  • (Z)-5-dodecenyl acetate
  • (Z)-7-dodecenyl acetate
  • (Z)-7-tetradecenyl acetate
  • (Z)-9-tetradecenyl acetate
  • 11-dodecenyl acetate
  • Lepidoptera
  • Noctuidae
  • Sex pheromone
  • Trichoplusia ni
  • dodecyl acetate

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Biochemistry


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